S-3ASR

As filed with the Securities and Exchange Commission on May 20, 2011.

Registration No. 333-      

UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

Form S-3

REGISTRATION STATEMENT
UNDER
THE SECURITIES ACT OF 1933

PIONEER NATURAL RESOURCES COMPANY
PIONEER NATURAL RESOURCES USA, INC.
(Exact name of registrants as specified in their charters)

Delaware	75-2702753
Delaware	75-2516853
(State or other jurisdiction of incorporation or organization)	(I.R.S. employer identification no.)

5205 North O’Connor Blvd., Suite 200
Irving, Texas 75039
(972) 444-9001

(Address, including zip code, and telephone number, including area code, of registrants’ principal executive offices)

Scott D. Sheffield
Chief Executive Officer
Pioneer Natural Resources Company
5205 North O’Connor Blvd., Suite 200
Irving, Texas 75039
(972) 444-9001

(Name, address, including zip code, and telephone number, including area code, of agent for service)

Copies to:

Mark S. Berg
Executive Vice President and General Counsel
Pioneer Natural Resources Company
5205 North O’Connor Blvd., Suite 200
Irving, Texas 75039
(972) 444-9001 Robert L. Kimball
Vinson & Elkins L.L.P.
2001 Ross Avenue, Suite 3700
Dallas, Texas 75201
(214) 220-7700

Approximate date of commencement of proposed sale to the public:  From time to time after this Registration Statement becomes effective.

If the only securities being registered on this form are being offered pursuant to dividend or interest reinvestment plans, please check the following box.  o

If any of the securities being registered on this form are to be offered on a delayed or continuous basis pursuant to Rule 415 under the Securities Act of 1933, other than securities offered only in connection with dividend or interest reinvestment plans, check the following box.  þ

If this form is filed to register additional securities for an offering pursuant to Rule 462(b) under the Securities Act, check the following box and list the Securities Act Registration Statement number of the earlier effective Registration Statement for the same offering.  o

If this form is a post-effective amendment filed pursuant to Rule 462(c) under the Securities Act, please check the following box and list the Securities Act Registration Statement number of the earlier effective Registration Statement for the same offering.  o

If this form is a Registration Statement pursuant to General Instruction I.D. or a post-effective amendment thereto that shall become effective upon filing with the Commission pursuant to Rule 462(e) under the Securities Act, check the following box.  þ

If this form is a post-effective amendment to a Registration Statement filed pursuant to General Instruction I.D. filed to register additional securities or additional classes of securities pursuant to Rule 413(b) under the Securities Act, check the following box.  o

Indicate by check mark whether the registrant is a large accelerated filer, an accelerated filer, a non-accelerated filer, or a smaller reporting company. See the definitions of “large accelerated filer,” “accelerated filer” and “smaller reporting company” in Rule 12b-2 of the Exchange Act. (Check one):

Large accelerated filer þ	Accelerated filer o	Non-accelerated filer o	Smaller reporting company o
		(Do not check if a smaller reporting company)

CALCULATION OF REGISTRATION FEE

		Proposed Maximum	Proposed Maximum	Amount of
Title of Each Class of	Amount to be	Offering	Aggregate	Registration
Securities to be Registered	Registered(1)	Price Per Unit(2)	Offering Price(2)	Fee(3)
Debt securities(4)(5)
Guarantees of debt securities(5)
Common stock, par value $.01 per share(4)(6)
Preferred stock, par value $.01 per share(4)
Depositary shares(4)(7)
Warrants(4)
Stock purchase contracts(4)
Stock purchase units(4)

(1)	An indeterminate aggregate initial offering price or number of the securities of each identified class is being registered as may from time to time be offered hereunder at indeterminate prices. Separate consideration may or may not be received for securities that are issuable on exercise, conversion or exchange of other securities or that are issued in units or represented by depositary shares.
(2)	Pursuant to General Instruction II.E., this information is not required to be included. The proposed maximum offering price per security will be determined from time to time by the registrant(s) in connection with the issuance of the securities registered by this Registration Statement. If any debt securities or preferred stock are issued at an original issue discount, then the amount registered will include the principal or liquidation amount of such securities measured by the initial offering price thereof.
(3)	In accordance with Rules 456(b) and 457(r) under the Securities Act of 1933, the registrants are deferring payment of all of the registration fee.
(4)	This Registration Statement covers an indeterminate amount of securities as may be issued in exchange for, or upon conversion or exercise of, as the case may be, the debt securities, common stock, preferred stock, depositary shares or warrants registered under this Registration Statement and such indeterminate amount of securities as may be issued upon settlement of the stock purchase contracts or stock purchase units registered under this Registration Statement. The securities registered under this Registration Statement may be sold separately or as units with other securities registered under this Registration Statement. No separate consideration will be received for any securities registered under this Registration Statement that are issued in exchange for, or upon conversion of, as the case may be, the debt securities, common stock, preferred stock, depositary shares or warrants.
(5)	The debt securities will be issued by Pioneer Natural Resources Company and may be accompanied by guarantees issued by Pioneer Natural Resources USA, Inc. Pursuant to Rule 457(n), no separate fee is payable with respect to the guarantees being registered hereby.
(6)	Each share of common stock registered under this Registration Statement includes an associated right to purchase Series A Junior Participating Preferred Stock. Until the occurrence of certain prescribed events, none of which has occurred, such rights (a) are not exercisable, (b) are evidenced by the certificates representing the common stock, and (c) may be transferred only with the common stock. No separate consideration is payable for such rights.
(7)	The depositary shares registered hereunder will be evidenced by depositary receipts issued pursuant to a depositary agreement. If the registrants elect to offer to the public fractional interests in shares of preferred stock, then the registrants will distribute depositary receipts to those persons purchasing the fractional interests and will issue the shares of preferred stock to the depositary under the depositary agreement.

PROSPECTUS

Pioneer Natural Resources Company
Pioneer Natural Resources USA, Inc., as Guarantor

Debt Securities
Guarantees of Debt Securities
Common Stock
Preferred Stock
Depositary Shares
Warrants
Stock Purchase Contracts
Stock Purchase Units

We may offer and sell the securities listed above from time to time in one or more classes or series and in amounts, at prices and on terms that we will determine at the time of the offering. Any debt securities we issue under this prospectus may be guaranteed by Pioneer Natural Resources USA, Inc., our wholly-owned subsidiary that we call Pioneer USA.

This prospectus describes some of the general terms that may apply to these securities and the general manner in which they may be offered. We will provide specific terms of the securities to be sold by us, including any guarantee by Pioneer USA, and the methods by which we will sell them in one or more supplements to this prospectus. The prospectus supplement may also add, update or change information contained in this prospectus. You should read this prospectus and any supplement carefully before you invest. This prospectus may not be used to offer or sell securities without a prospectus supplement describing the methods and terms of the offering. We may sell the securities directly or we may distribute them through underwriters or dealers. In addition, the underwriters may overallot a portion of the securities.

Our common stock is listed on the New York Stock Exchange under the symbol “PXD.”

Investing in these securities involves risks. We recommend that you read carefully the risks we describe in any accompanying prospectus supplement and the risks factors that are incorporated by reference into this prospectus from our filings made with the Securities and Exchange Commission. See “Risk Factors” on page 2 of this prospectus.

Neither the Securities and Exchange Commission nor any state securities commission has approved or disapproved of these securities or determined if this prospectus is truthful or complete. Any representation to the contrary is a criminal offense.

The date of this prospectus is May 20, 2011.

TABLE OF CONTENTS

	Page
About This Prospectus		1
Uncertainty of Forward-Looking Statements		2
Risk Factors		2
Where You Can Find More Information		2
Information That Pioneer and Pioneer USA Incorporate by Reference		3
Pioneer and Pioneer USA		4
Use of Proceeds		4
Ratios of Earnings to Fixed Charges and Earnings to Fixed Charges and Preferred Stock Dividends		4
Description of Debt Securities		6
Description of Guarantees of Debt Securities		16
Description of Capital Stock		17
Description of Depositary Shares		23
Description of Warrants		25
Description of Stock Purchase Contracts and Stock Purchase Units		27
Plan of Distribution		28
Legal Matters		29
Experts		29
EX-4.18
EX-5.1
EX-23.1
EX-23.3
EX-25.1

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ABOUT THIS PROSPECTUS

This prospectus is part of a Registration Statement on Form S-3 that Pioneer and Pioneer USA filed with the Securities and Exchange Commission, or the SEC, using a shelf registration process. Under this shelf process, Pioneer or Pioneer USA may sell any combination of the securities described in this prospectus in one or more offerings. This prospectus provides you with a general description of the securities Pioneer or Pioneer USA may offer. Each time Pioneer or Pioneer USA sells securities, Pioneer or Pioneer USA will provide a prospectus supplement that will contain specific information about the terms of that offering. This prospectus does not contain all of the information included in the Registration Statement. For a more complete understanding of the offering of the securities, you should refer to the Registration Statement, including its exhibits. The prospectus supplement may also add, update or change information contained in this prospectus. You should read both this prospectus and any prospectus supplement together with the documents incorporated by reference into this prospectus as described below under the heading “Information that Pioneer and Pioneer USA Incorporate by Reference.”

You should rely only on the information contained or incorporated by reference in this prospectus and any prospectus supplement. Pioneer and Pioneer USA have not authorized anyone to provide you with different information. Pioneer and Pioneer USA are not making offers to sell the securities in any jurisdiction in which an offer or solicitation is not authorized or in which the person making such offer or solicitation is not qualified to do so or to anyone to whom it is unlawful to make an offer or solicitation.

The information in this prospectus is accurate as of the date on the front cover. You should not assume that the information contained in this prospectus is accurate as of any other date.

In this prospectus, references to the terms “we,” “us” or “Pioneer” or other similar terms refer to Pioneer Natural Resources Company, and not to Pioneer Natural Resources USA, Inc., unless we state otherwise or the context indicates otherwise. References to “Pioneer USA” refer to Pioneer Natural Resources USA, Inc.

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UNCERTAINTY OF FORWARD-LOOKING STATEMENTS

This prospectus and the documents Pioneer and Pioneer USA incorporate by reference contain statements that constitute “forward-looking statements” within the meaning of Section 27A of the Securities Act of 1933, Section 21E of the Securities Exchange Act of 1934 and the Private Securities Litigation Reform Act of 1995. The forward-looking statements speak only as of the date made, and Pioneer and Pioneer USA undertake no obligation to update such forward-looking statements. These forward-looking statements may be identified by the use of the words “believe,” “expect,” “anticipate,” “will,” “contemplate,” “would” and similar expressions that contemplate future events. These statements appear in a number of places in this prospectus and in documents Pioneer and Pioneer USA incorporate by reference. All statements other than statements of historical fact included or incorporated in this prospectus, including statements regarding Pioneer’s or Pioneer USA’s financial position, business strategy, production and reserve growth and other plans and objectives for Pioneer’s or Pioneer USA’s future operations, are forward-looking statements.

Although Pioneer and Pioneer USA believe that such forward-looking statements are based on reasonable assumptions, Pioneer and Pioneer USA give no assurance that Pioneer’s or Pioneer USA’s expectations will in fact occur. Important factors could cause actual results to differ materially from those in the forward-looking statements, including factors identified in Pioneer’s periodic and current reports incorporated in this prospectus by reference or as stated in a prospectus supplement to this prospectus under the caption “Risk Factors.” Forward-looking statements are subject to risks and uncertainties and include information concerning general economic conditions and possible or assumed future results of operations, estimates of oil and gas production and reserves, drilling plans, future cash flows, anticipated capital expenditures, Pioneer’s realization of deferred tax assets, the level of future expenditures for environmental costs, government regulation or action and the strategies, plans and objectives of Pioneer’s management.

This cautionary statement expressly qualifies in their entirety all forward-looking statements attributable to Pioneer or Pioneer USA.

RISK FACTORS

Investing in our securities involves risks. You should carefully consider the specific risks described in our Annual Report on Form 10-K for the fiscal year ended December 31, 2010, the risk factors described under the caption “Risk Factors” in any applicable prospectus supplement, and any risk factors set forth in our other filings with the SEC pursuant to Sections 13(a), 13(c), 14 or 15(d) of the Securities Exchange Act of 1934 before making an investment decision. See “Where You Can Find More Information.”

WHERE YOU CAN FIND MORE INFORMATION

Pioneer files annual, quarterly and other reports, proxy statements and other information with the SEC. You may read and copy any document Pioneer files at the SEC’s public reference room at 100 F Street, N.E., Room 1580, Washington, D.C. 20549. Please call the SEC at 1-800-SEC-0330 for further information on the operation of the public reference room. The SEC also maintains an Internet site (www.sec.gov) that contains the reports, proxy and information statements that Pioneer files electronically with the SEC. Pioneer’s reports, proxy and information statements are also available through its Internet site at www.pxd.com. The information contained in this website is not part of this prospectus.

Pioneer’s common stock is listed on the New York Stock Exchange under the symbol “PXD.” Pioneer’s reports and other information filed with the SEC can also be inspected at the offices of the New York Stock Exchange, 11 Wall Street, New York, New York 10005.

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INFORMATION THAT PIONEER AND PIONEER USA INCORPORATE BY REFERENCE

The SEC allows Pioneer and Pioneer USA to incorporate by reference the information Pioneer files with the SEC, which means that Pioneer and Pioneer USA can disclose important information to you by referring you to those documents. The information incorporated by reference is an important part of this prospectus, and information Pioneer files later with the SEC will automatically update and supersede this information. Except to the extent that information therein is deemed furnished and not filed pursuant to securities laws and regulations, Pioneer and Pioneer USA incorporate by reference the documents listed below that Pioneer filed with the SEC under the Securities Exchange Act of 1934:

•  the description of Pioneer’s common stock contained in its Registration Statement on Form 8-A, filed with the SEC on August 5, 1997, the amendment to that Registration Statement filed with the SEC on August 8, 1997, and any subsequently filed amendments and reports updating such description;

•  the description of the rights to purchase Pioneer’s Series A Junior Participating Preferred Stock pursuant to Pioneer’s stockholder rights plan contained in Pioneer’s Registration Statement on Form 8-A filed with the SEC on July 24, 2001, the amendment to that Registration Statement filed with the SEC on May 23, 2006, and any subsequently filed amendments and reports updating such description;

•  Pioneer’s annual report on Form 10-K for the year ended December 31, 2010;

•  Pioneer’s quarterly report on Form 10-Q for the three months ended March 31, 2011, as amended on May 19, 2011;

•  Pioneer’s current reports on Form 8-K, filed with the SEC on January 6, 2011, February 22, 2011, February 25, 2011, April 5, 2011 and May 18, 2011.

Pioneer and Pioneer USA also incorporate by reference each of the documents that Pioneer files with the SEC under Sections 13(a), 13(c), 14 or 15(d) of the Securities Exchange Act of 1934 (excluding any information furnished under Items 2.02 or 7.01 in any Current Report on Form 8-K and any other information that is deemed furnished and not filed) after the date of this prospectus until the offering of the securities terminates or Pioneer or Pioneer USA has filed with the SEC an amendment to the Registration Statement relating to this offering that deregisters all securities then remaining unsold.

You may request a copy of any of these filings, other than an exhibit to those filings unless Pioneer or Pioneer USA has specifically incorporated that exhibit by reference into the filing, at no cost, by telephoning or writing Pioneer or Pioneer USA at the following address:

Pioneer Natural Resources Company
5205 North O’Connor Blvd., Suite 200
Irving, Texas 75039
Attention: Investor Relations
Telephone: (972) 444-9001

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PIONEER AND PIONEER USA

Pioneer is a large independent oil and gas exploration and production company with operations in the United States and South Africa. Pioneer USA is a wholly-owned subsidiary of Pioneer and owns the majority of Pioneer’s United States oil and gas properties.

The executive offices of Pioneer and Pioneer USA are located at 5205 North O’Connor Blvd., Suite 200, Irving, Texas 75039, telephone number: (972) 444-9001. Pioneer maintains other offices in Anchorage, Alaska; Denver, Colorado; Midland, Texas; London, England; and Capetown, South Africa.

USE OF PROCEEDS

Unless Pioneer or Pioneer USA informs you otherwise in the prospectus supplement, each of Pioneer and Pioneer USA expects to use the net proceeds from the sale of securities for general corporate purposes. These purposes may include, but are not limited to:

•  reduction or refinancing of debt or other corporate obligations;

•  acquisitions;

•  capital expenditures; and

•  working capital.

Pending any specific application, each of Pioneer and Pioneer USA may initially invest funds in short-term marketable securities or apply them to the reduction of short-term indebtedness.

RATIOS OF EARNINGS TO FIXED CHARGES AND
EARNINGS TO FIXED CHARGES AND PREFERRED STOCK DIVIDENDS

The following table sets forth Pioneer’s ratios of consolidated earnings to fixed charges and earnings to fixed charges and preferred stock dividends for the periods presented:

	Three Months
	Ended
	March 31,			Year Ended December 31,
	2011			2010		2009			2008		2007		2006
Ratio of earnings to fixed charges(a)		(b	)		4.67		(b	)		2.38		2.39		2.78
Ratio of earnings to fixed charges and preferred stock dividends(c)		(b	)		4.67		(b	)		2.38		2.39		2.78

(a)	The ratio has been computed by dividing earnings by fixed charges. For purposes of computing the ratio:
	• earnings consist of income from continuing operations before income taxes, cumulative effect of change in accounting principle, adjustments for net income or loss attributable to noncontrolling interests and the Company’s share of investee’s income or loss accounted for under the equity method, and adjustment for capitalized interest, plus fixed charges and the Company’s share of distributed income from investees accounted for under the equity method; and
	• fixed charges consist of interest expense, capitalized interest and the portion of rental expense deemed to be representative of the interest component of rental expense.
(b)	The ratios indicate a less than one-to-one coverage because the earnings are inadequate to cover the fixed charges (i) during the three months ended March 31, 2011 by $116.8 million and (ii) for the year ended December 31, 2009 by $266.9 million.
(c)	The ratio has been computed by dividing earnings by fixed charges and preferred stock dividends. For purposes of computing the ratio:
	• earnings consist of income from continuing operations before income taxes, cumulative effect of change in accounting principle, adjustments for net income or loss attributable to noncontrolling interests and the Company’s share of investee’s income or loss accounted for under the equity method, and adjustment

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for capitalized interest, plus fixed charges, the Company’s share of distributed income from investees accounted for under the equity method and preferred stock dividends, net of preferred stock dividends of a consolidated subsidiary; and

• fixed charges and preferred stock dividends consist of interest expense, capitalized interest and the portion of rental expense deemed to be representative of the interest component of rental expense, preferred stock dividends of a consolidated subsidiary and preferred stock dividends.

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DESCRIPTION OF DEBT SECURITIES

This section describes the general terms and provisions of the debt securities that Pioneer may issue separately, upon exercise of a debt warrant, in connection with a stock purchase contract, or as part of a stock purchase unit from time to time in the form of one or more series of debt securities. The applicable prospectus supplement will describe the specific terms of the debt securities offered through that prospectus supplement as well as any general terms described in this section that will not apply to those debt securities.

Pioneer’s debt securities will be issued under an indenture to be entered into between Pioneer and Wells Fargo Bank, National Association, as trustee, as supplemented from time to time. Under the indenture, Pioneer’s debt securities may be subordinated to other indebtedness of Pioneer. See “Description of Debt Securities — Subordination of Subordinated Debt Securities” below. We have filed the indenture as an exhibit to the Registration Statement of which this prospectus is a part. You can obtain a copy of the indenture and any indenture supplements by following the directions outlined in “Where You Can Find More Information.” We urge you to read the indenture and any supplement thereto because they, and not this description, control your rights as a debt securities holder.

The indenture will not limit the amount of debt securities that Pioneer may issue and will permit Pioneer to issue securities from time to time in one or more series. The debt securities will be unsecured obligations of Pioneer, unless otherwise stated in the applicable prospectus supplement. Pioneer currently conducts substantially all of its operations through subsidiaries, and the holders of debt securities (whether senior or subordinated debt securities) will be effectively subordinated to the creditors of Pioneer’s subsidiaries. This means that creditors of Pioneer’s subsidiaries will have a claim to the assets of Pioneer’s subsidiaries that is superior to the claim of Pioneer’s creditors, including holders of Pioneer’s debt securities.

The applicable prospectus supplement will describe the following terms of any series of debt securities that Pioneer may offer:

•  the title of the debt securities;

•  whether they are senior debt securities or subordinated debt securities;

•  the total amount of the debt securities authorized and the amount outstanding, if any;

•  any limit on the aggregate principal amount of the debt securities offered through that prospectus supplement;

•  the identity of the person to whom Pioneer will pay interest if it is anybody other than the holder;

•  when the principal of the debt securities will mature;

•  the interest rate or the method for determining it, including any procedures to vary or reset the interest rate;

•  when interest will be payable, as well as the record dates for determining to whom Pioneer will pay interest;

•  where the principal of, premium, if any, and interest on the debt securities will be paid;

•  whether Pioneer has any obligation to redeem, repurchase or repay the debt securities under any mandatory or optional sinking funds or similar arrangements and the terms of those arrangements;

•  when the debt securities may be redeemed if they are redeemable, as well as the redemption prices, and a description of the terms of redemption;

•  whether Pioneer has any obligation to redeem or repurchase the debt securities at the holder’s option;

•  the denominations of the debt securities, if other than $1,000 or an integral multiple of $1,000;

•  the amount that Pioneer will pay the holder if the maturity of the debt securities is accelerated, if other than their principal amount;

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•  the currency in which Pioneer will make payments to the holder and, if a foreign currency, the manner of conversion from United States dollars;

•  any index Pioneer may use to determine the amount of payment of principal of, premium, if any, and interest on the debt securities;

•  whether the debt securities will be issued in electronic, global or certificated form;

•  if the debt securities will be issued only in the form of a global note, the name of the depositary or its nominee and the circumstances under which the global note may be exchanged in whole or in part for other individual debt securities in definitive registered form;

•  the applicability of the legal defeasance and covenant defeasance provisions in the applicable indenture;

•  any additions or changes to events of default and any additional events of default that would result in acceleration of their maturity;

•  whether the debt securities will be issued as registered securities or bearer securities and, if the debt securities are bearer securities, whether coupons will be attached, whether and to whom any additional interest payments shall be made, and the circumstances, if any, under which the bearer debt securities may be exchanged for registered debt securities;

•  the applicability or inapplicability of any covenants and any additions or changes to the covenants, including those relating to permitted consolidations, mergers or sales of assets or otherwise;

•  if any debt securities do not bear interest, the dates for any required reports to the trustee;

•  the amount that will be deemed to be the principal amount of the debt securities as of a particular date before maturity if the principal amount payable at the stated maturity date will not be able to be determined on that date;

•  whether the debt securities will be convertible into or exchangeable for any other securities and the terms and conditions upon which a conversion or exchange may occur, including the initial conversion or exchange price or rate, the conversion or exchange period and any other additional provisions;

•  the terms of any repurchase or remarketing rights of third parties;

•  the terms of any guarantee of the debt securities; and

•  any other material terms of the debt securities.

Generally, Pioneer will pay the principal of, premium, if any, and interest on Pioneer’s registered debt securities either at an office or agency that Pioneer maintains for that purpose or, if Pioneer elects, Pioneer may pay interest by mailing a check to your address as it appears on Pioneer’s register (or, at the election of the holder, by wire transfer to an account designated by the holder). Except as may be provided otherwise in the applicable prospectus supplement, no payment on a bearer security will be made by mail to an address in the United States or by wire transfer to an account in the United States. Except as may be provided otherwise in the applicable prospectus supplement, Pioneer will issue its debt securities only in fully registered form without coupons, generally in denominations of $1,000 or integral multiples of $1,000. Pioneer will not apply a service charge for a transfer or exchange of its debt securities, but Pioneer may require that you pay the amount of any applicable tax or other governmental charge.

Debt securities may bear interest at fixed or floating rates. Pioneer may issue its debt securities at an original issue discount, bearing no interest or bearing interest at a rate that, at the time of issuance, is below market rate, to be sold at a substantial discount below their stated principal amount. Generally speaking, if Pioneer’s debt securities are issued at an original issue discount and there is an event of default or acceleration of their maturity, holders will receive an amount less than their principal amount. Tax and other special considerations applicable to any series of debt securities, including original issue discount debt, will be described in the prospectus supplement in which Pioneer offers those debt securities.

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Pioneer will have the ability under the indenture to reopen a previously issued series of debt securities and issue additional debt securities of that series or establish additional terms of the series. Pioneer is also permitted to issue debt securities with the same terms as previously issued debt securities.

Pioneer will comply with Section 14(e) under the Securities Exchange Act of 1934 and any other tender offer rules under the Securities Exchange Act of 1934 that may then apply to any obligation Pioneer may have to purchase debt securities at the option of the holders. Any such obligation applicable to a series of debt securities will be described in the related prospectus supplement.

Subordination of Subordinated Debt Securities

Debt securities of a series may be subordinated to senior indebtedness to the extent set forth in the prospectus supplement relating to the subordinated debt securities. The definition of “senior indebtedness” (1) will include, among other things, Pioneer’s indebtedness, whether outstanding on the original issue date of the debt securities or incurred after such date, unless the instrument that creates or evidences such indebtedness provides that such obligations are subordinate in right of payment to the debt securities, and (2) will be specifically set forth in the prospectus supplement relating to the subordinated debt securities.

Subordinated debt securities of a particular series and any coupons relating to those debt securities will be subordinate in right of payment, to the extent and in the manner set forth in the indenture and the prospectus supplement relating to those subordinated debt securities, to the prior payment of all of Pioneer’s indebtedness that is designated as senior indebtedness with respect to that series.

Upon any payment or distribution of Pioneer’s assets to creditors or upon a total or partial liquidation or dissolution of Pioneer or in a bankruptcy, receivership or similar proceeding relating to Pioneer or its property, holders of senior indebtedness will be entitled to receive payment in full in cash of the senior indebtedness before holders of subordinated debt securities will be entitled to receive any payment of principal, premium, if any, or interest with respect to the subordinated debt securities and, until the senior indebtedness is paid in full, any distribution to which holders of subordinated debt securities would otherwise be entitled will be made to the holders of senior indebtedness (except that holders of subordinated debt securities may receive shares of stock and any debt securities that are subordinated to senior indebtedness to at least the same extent as the subordinated debt securities), all as described in the applicable prospectus supplement.

Unless otherwise provided in an applicable prospectus supplement, Pioneer may not (1) make any payments of principal, premium, if any, or interest with respect to subordinated debt securities, (2) make any deposit for the purpose of defeasance of the subordinated debt securities, or (3) repurchase, redeem or otherwise retire (except, in the case of subordinated debt securities that provide for a mandatory sinking fund, by Pioneer’s delivery of subordinated debt securities to the trustee in satisfaction of Pioneer’s sinking fund obligation) any subordinated debt securities if:

•  any principal, premium or interest with respect to senior indebtedness is not paid within any applicable grace period (including at maturity); or

•  any other default on senior indebtedness occurs and the maturity of that senior indebtedness is accelerated in accordance with its terms,

unless, in either case, the default has been cured or waived and the acceleration has been rescinded, the senior indebtedness has been paid in full in cash, or Pioneer and the trustee receive written notice approving the payment from the representatives of each issue of specified senior indebtedness as described in the applicable prospectus supplement.

Unless otherwise provided in an applicable prospectus supplement, during the continuance of any default (other than a default described in the preceding paragraph) with respect to any senior indebtedness pursuant to which the maturity of that senior indebtedness may be accelerated immediately without further notice (except such notice as may be required to effect the acceleration) or the expiration of any applicable grace periods, Pioneer may not pay the subordinated debt securities for such periods after notice of the default from the representative of specified senior indebtedness as shall be specified in the applicable prospectus supplement.

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By reason of this subordination, in the event of insolvency, Pioneer’s creditors who are holders of senior indebtedness or holders of any indebtedness or preferred stock of Pioneer’s subsidiaries, as well as certain of Pioneer’s general creditors, may recover more, ratably, than the holders of the subordinated debt securities.

Events of Default

Except as may be provided otherwise in a prospectus supplement, any of the following events will constitute an event of default for a series of debt securities under the indenture:

•  failure to pay interest on Pioneer’s debt securities of that series, or any payment with respect to the related coupons, if any, for 30 days past the applicable due date;

•  failure to pay principal of, or premium, if any, on Pioneer’s debt securities of that series when due, whether at maturity, upon redemption, by declaration, upon required repurchase or otherwise;

•  failure to make any sinking fund payment on debt securities of that series when due;

•  failure to perform any covenant or agreement in the indenture, including failure to comply with the provisions of the indenture relating to consolidations, mergers and sales of assets, but other than a covenant included in the indenture solely for the benefit of a different series of Pioneer’s debt securities, which failure to comply continues for 90 days after written notice from the trustee or holders of 25% of the outstanding principal amount of the debt securities of that series as provided in the applicable indenture;

•  acceleration of more than $50,000,000 of indebtedness of Pioneer under the terms of the applicable debt instrument if the acceleration is not rescinded or the indebtedness is not paid within ten days after written notice from the trustee or holders of 25% of the outstanding principal amount of the debt securities of that series as provided in the indenture;

•  specified events relating to the bankruptcy, insolvency or reorganization of Pioneer or any of its significant subsidiaries; and

•  any other event of default provided with respect to debt securities of that series.

An event of default with respect to one series of debt securities is not necessarily an event of default for another series. The trustee may withhold notice to the holders of debt securities of any default (except in the payment of principal, premium, if any, or interest) if it considers such withholding of notice to be in the interests of the holders.

If an event of default described in the sixth bullet point above occurs, the entire principal of, premium, if any, and accrued interest on, all debt securities then outstanding will be due and payable immediately, without any declaration or other act on the part of the trustee or any holders. If any other event of default for any series of debt securities occurs and continues for the requisite amount of time, the trustee or the holders of at least 25% in aggregate principal amount of the debt securities of the series may declare the entire principal of, and accrued interest on, all the debt securities of that series to be due and payable immediately. If this happens, subject to certain conditions, the holders of a majority in aggregate principal amount of the debt securities of that series can rescind the declaration. Other than its duties in case of a default, a trustee is not obligated to exercise any of its rights or powers under the indenture at the request, order or direction of any holders, unless the holders offer the trustee reasonable security or indemnity. If they provide this reasonable security or indemnification, the holders of a majority in aggregate principal amount of any series of debt securities may direct the time, method and place of conducting any proceeding for any remedy available to the trustee, or exercising any power conferred upon the trustee, for that series of debt securities.

Before the acceleration of the maturity of the debt securities of any series, the holders of a majority in aggregate principal amount of the debt securities of that series may, on behalf of the holders of all debt securities and any related coupons of that series, waive any past default or event of default and its consequences for that series, except (1) a default in the payment of the principal, premium or interest with respect to those debt securities or (2) a default with respect to a provision of the indenture that cannot be

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amended without the consent of each holder affected by the amendment. In case of a waiver of a default, that default shall cease to exist, any event of default arising from that default shall be deemed to have been cured for all purposes, and Pioneer, the trustee and the holders of the senior debt securities of that series will be restored to their former positions and rights under the indenture.

A default in the payment of any of Pioneer’s debt securities, or a default with respect to Pioneer’s debt securities that causes them to be accelerated, may give rise to a cross-default under Pioneer’s bank credit facility or other indebtedness.

Satisfaction and Discharge of the Indenture

The indenture will generally cease to be of any further effect with respect to a series of debt securities if:

•  Pioneer has delivered to the trustee for cancellation all debt securities of that series (with certain limited exceptions); or

•  all debt securities and coupons of that series not previously delivered to the trustee for cancellation have become due and payable, whether by redemption, at stated maturity or otherwise, and Pioneer has deposited with the trustee as trust funds the entire amount sufficient to pay at maturity or upon redemption all of those debt securities and coupons;

and if, in either case, Pioneer also pays or causes to be paid all other sums payable under the indenture by Pioneer.

Legal Defeasance and Covenant Defeasance

Any series of Pioneer’s debt securities may be subject to the defeasance and discharge provisions of the indenture if so specified in the applicable prospectus supplement. If those provisions are applicable, Pioneer may elect either:

•  legal defeasance — which will permit Pioneer to defease and be discharged from, subject to limitations, all of its obligations with respect to those debt securities; or

•  covenant defeasance — which will permit Pioneer to be released from its obligations to comply with covenants relating to those debt securities as described in the applicable prospectus supplement, which may include obligations concerning subordination of Pioneer’s subordinated debt securities.

If Pioneer exercises its legal defeasance option with respect to a series of debt securities, payment of those debt securities may not be accelerated because of an event of default. If Pioneer exercises its covenant defeasance option with respect to a series of debt securities, payment of those debt securities may not be accelerated because of an event of default related to the specified covenants.

Unless otherwise provided in the applicable prospectus supplement, Pioneer may invoke legal defeasance or covenant defeasance with respect to any series of its debt securities only if:

•  Pioneer irrevocably deposits with the trustee, in trust, an amount in funds or U.S. government obligations that, through the payment of principal and interest in accordance with their terms, will provide money in an amount sufficient to pay, when due upon maturity or redemption, as the case may be, the principal of, premium, if any, and interest on those debt securities;

•  Pioneer delivers to the trustee a certificate from a nationally recognized firm of independent accountants expressing their opinion that the payments of principal and interest when due and without reinvestment on the deposited U.S. government obligations plus any deposited money without investment will provide cash at such times and in such amounts as will be sufficient to pay the principal, premium, if any, and interest when due with respect to all the debt securities of that series to maturity or redemption, as the case may be;

•  91 days pass after the deposit is made and, during the 91-day period, no default relating to Pioneer’s bankruptcy, insolvency or reorganization occurs that is continuing at the end of that period;

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•  no event of default has occurred and is continuing on the date of the deposit and after giving effect to the deposit;

•  the deposit is not a default under any other material agreement binding on Pioneer and, in the case of subordinated debt securities, is not prohibited by the subordination provisions of the indenture;

•  Pioneer delivers to the trustee an opinion of counsel to the effect that the trust resulting from the deposit is not, or is qualified as, a regulated investment company under the Investment Company Act of 1940;

•  Pioneer delivers to the trustee an opinion of counsel addressing certain U.S. federal income tax matters relating to the defeasance; and

•  Pioneer delivers to the trustee an officers’ certificate and an opinion of counsel, each stating that all conditions precedent to the defeasance of the debt securities of that series as contemplated by the applicable indenture have been complied with.

Modification and Waiver

Pioneer may enter into supplemental indentures for the purpose of modifying or amending the indenture with the consent of holders of at least a majority in aggregate principal amount of each series of Pioneer’s outstanding debt securities affected. However, unless otherwise provided in the applicable prospectus supplement, the consent of all of the holders of Pioneer’s debt securities that are affected by any modification or amendment is required for any of the following:

•  to reduce the percentage in principal amount of debt securities of any series whose holders must consent to an amendment or waiver;

•  to reduce the rate of or extend the time for payment of interest on any debt security or coupon or reduce the amount of any interest payment to be made with respect to any debt security or coupon;

•  to reduce the principal of or extend the stated maturity of principal of any debt security;

•  to reduce any premium payable upon the redemption of any debt security or change the time at which any debt security may or shall be redeemed;

•  to make any debt security payable in a currency other than that stated in that debt security;

•  to modify the subordination provisions of Pioneer’s subordinated debt securities in a manner adverse to holders;

•  to release any security that may have been granted with respect to the debt securities;

•  to impair the right of any holder to receive payment of principal of and premium, if any, and interest on the debt securities on and after the due date therefor;

•  to make any change in the provisions of the indenture relating to waivers of defaults or amendments that require unanimous consent;

•  to change any obligations provided for in the indenture to pay any additional interest with respect to bearer securities; and

•  to limit Pioneer’s obligations to maintain a paying agency outside the United States for payment on bearer securities or limit Pioneer’s obligation to redeem certain bearer securities.

In addition, with respect to the indenture, Pioneer and the trustee may enter into supplemental indentures without the consent of the holders of debt securities for one or more of the following purposes (in addition to any other purposes specified in an applicable prospectus supplement):

•  to evidence that another person has become Pioneer’s successor under the provisions of the indenture relating to consolidations, mergers and sales of assets and that the successor assumes Pioneer’s covenants, agreements and obligations in the indenture and in the debt securities;

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•  to surrender any of Pioneer’s rights or powers under the indenture, to limit the applicability of or consequences of breach of any covenant under the indenture, to add to Pioneer’s covenants further covenants, restrictions, conditions or provisions for the protection of the holders of all or any series of debt securities issued under the indenture, and to make a default in any of these additional covenants, restrictions, conditions or provisions a default or an event of default under the indenture;

•  to cure any ambiguity or omission or to make corrections or supplements to the indenture, any supplemental indenture or any debt securities issued under the indenture, or to convey, transfer, assign, mortgage or pledge any property to or with the trustee;

•  to modify or amend the indenture to permit the qualification of the indenture or any supplemental indenture under the Trust Indenture Act of 1939 as then in effect;

•  to add to or change any of the provisions of the indenture to provide that bearer securities may be registrable as to principal, to change or eliminate any restrictions on the payment of principal or premium with respect to registered securities or of principal, premium or interest with respect to bearer securities, or to permit registered securities to be exchanged for bearer securities, so long as none of these actions adversely affects the interests of the holders of debt securities or any coupons of any series in any material respect or permits the issuance of debt securities of any series in uncertificated form;

•  to comply with the provisions of the indenture relating to consolidations, mergers and sales of assets;

•  to modify the subordination provisions of Pioneer’s subordinated debt securities in a manner that would limit or terminate the benefits available to any holder of senior indebtedness (or its representative) under such subordination provisions;

•  to add guarantees with respect to any or all of the debt securities or to secure any or all of the debt securities;

•  to make any change that does not adversely affect the rights of any holder of a series of debt securities under the indenture;

•  to add to, change or eliminate any of the provisions of the indenture with respect to one or more series of debt securities, so long as the addition, change or elimination not otherwise permitted under the indenture will (1) neither apply to any debt security of any series created before the execution of the supplemental indenture and entitled to the benefit of that provision nor modify the rights of the holders of that debt security with respect to that provision or (2) become effective only when there is none of that debt security outstanding;

•  to evidence and provide for the acceptance of appointment by a successor or separate trustee with respect to the debt securities of one or more series and to add to or change any of the provisions of the indenture as necessary to provide for the administration of the indenture by more than one trustee;

•  to establish the form or terms of debt securities and coupons, if any, of any series; and

•  to provide for uncertificated debt securities in addition to or in place of certificated debt securities, subject to certain limitations.

Consolidation, Merger and Sale of Assets

Unless otherwise provided in the applicable prospectus supplement, the indenture prohibits Pioneer from consolidating with or merging into another business entity, or transferring or leasing substantially all of Pioneer’s assets, unless:

•  Pioneer is the continuing entity in the case of a merger; or the surviving or acquiring entity, if other than Pioneer, is organized and validly existing under the laws of the United States of America, any state thereof, or the District of Columbia and it expressly assumes Pioneer’s obligations with respect to Pioneer’s debt securities by executing a supplemental indenture;

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•  immediately after giving effect to the transaction, no default or event of default would occur or be continuing;

•  the successor company waives any right to redeem any bearer security under circumstances in which the successor company would be entitled to redeem the bearer security but Pioneer would have not been entitled to redeem that bearer security if the consolidation, merger or sale had not occurred; and

•  Pioneer has delivered to the trustee an officers’ certificate and an opinion of counsel, each stating that the consolidation, merger or sale complies with the indenture.

The surviving or acquiring company will be substituted for Pioneer in the indenture with the same effect as if it had been an original party to the indenture, and the issuer will be relieved from any further obligations under the indenture.

No Protection in the Event of a Change of Control

Unless otherwise set forth in the prospectus supplement, the debt securities will not contain any provisions that protect the holders of the debt securities in the event of a change of control of Pioneer or in the event of a highly leveraged transaction, whether or not such transaction results in a change of control of Pioneer.

Conversion or Exchange Rights

If debt securities of any series are convertible or exchangeable, the applicable prospectus supplement will specify:

•  the type of securities into which they may be converted or exchanged;

•  the conversion price or exchange ratio, or its method of calculation;

•  whether conversion or exchange is mandatory or at the holder’s election;

•  how and when the conversion price or exchange ratio may be adjusted; and

•  any other important terms concerning the conversion or exchange rights.

Global Securities

Pioneer’s debt securities may be issued in the form of one or more global securities that will be deposited with a depositary or its nominee identified in the applicable prospectus supplement. If so, each global security will be issued in the denomination of the aggregate principal amount of securities that it represents. Unless and until it is exchanged in whole or in part for debt securities that are in definitive registered form, a global security may not be transferred or exchanged except as a whole to the depositary, another nominee of the depositary, or a successor of the depositary or its nominee. The applicable prospectus supplement will describe this concept more fully.

The specific material terms of the depositary arrangement with respect to any portion of a series of Pioneer’s debt securities that will be represented by a global security will be described in the applicable prospectus supplement. Pioneer anticipates that the following provisions will apply to Pioneer’s depositary arrangements.

Upon the issuance of any global security, and its deposit with or on behalf of the depositary, the depositary will credit, on its book-entry registration and transfer system, the principal amounts of Pioneer’s debt securities represented by the global security to the accounts of participating institutions that have accounts with the depositary or its nominee. The underwriters or agents engaging in the distribution of Pioneer’s debt securities, or Pioneer, if Pioneer is offering and selling its debt securities directly, will designate the accounts to be credited. Ownership of beneficial interests in a global security will be limited to participating institutions or their clients. The depositary or its nominee will keep records of the ownership and transfer of beneficial interests in a global security by participating institutions. Participating institutions will keep records of the

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ownership and transfer of beneficial interests by their clients. The laws of some jurisdictions may require that purchasers of Pioneer’s securities receive physical certificates, which may impair a holder’s ability to transfer its beneficial interests in global securities.

While the depositary or its nominee is the registered owner of a global security, the depositary or its nominee will be considered the sole owner of all of Pioneer’s debt securities represented by the global security for all purposes under the indentures. Generally, if a holder owns beneficial interests in a global security, that holder will not be entitled to have Pioneer’s debt securities registered in that holder’s own name, and that holder will not be entitled to receive a certificate representing that holder’s ownership. Accordingly, if a holder owns a beneficial interest in a global security, the holder must rely on the depositary and, if applicable, the participating institution of which that holder is a client to exercise the rights of that holder under the applicable indenture.

The depositary may grant proxies and otherwise authorize participating institutions to take any action that a holder is entitled to take under the indentures. Pioneer understands that, according to existing industry practices, if Pioneer requests any action of holders, or any owner of a beneficial interest in a global security wishes to give any notice or take any action, the depositary would authorize the participating institutions to give the notice or take the action, and the participating institutions would in turn authorize their clients to give the notice or take the action.

Generally, Pioneer will make payments on its debt securities represented by a global security directly to the depositary or its nominee. It is Pioneer’s understanding that the depositary will then credit the accounts of participating institutions, which will then distribute funds to their clients. Pioneer also expects that payments by participating institutions to their clients will be governed by standing instructions and customary practices, as is now the case with securities held for the accounts of clients registered in “street names,” and will be the responsibility of the participating institutions. Neither Pioneer nor the trustee, nor their respective agents, will have any responsibility, or bear any liability, for any aspects of the records relating to or payments made on account of beneficial interests in a global security, or for maintaining, supervising or reviewing records relating to beneficial interests.

Generally, a global security may be exchanged for certificated debt securities only in the following instances:

•  the depositary notifies Pioneer that it is unwilling or unable to continue as depositary, or it ceases to be a registered clearing agency, if required to be registered by law, and a successor is not appointed within 90 days; or

•  Pioneer determines in its sole discretion that it will no longer have debt securities represented by global securities or that it will permit global securities to be exchanged for certificated debt securities.

The following is based on information furnished to Pioneer:

Unless otherwise specified in the applicable prospectus supplement, The Depository Trust Company, which Pioneer refers to as “DTC,” will act as depositary for securities issued in the form of global securities. Global securities will be issued only as fully-registered securities registered in the name of Cede & Co., which is DTC’s nominee. One or more fully-registered global securities will be issued for these securities representing in the aggregate the total number of these securities, and will be deposited with or on behalf of DTC.

DTC is a limited-purpose trust company organized under the laws of the State of New York, a “banking organization” within the meaning of the New York Banking Law, a member of the Federal Reserve System, a “clearing corporation” within the meaning of the New York Uniform Commercial Code, and a “clearing agency” registered pursuant to the provisions of Section 17A of the Securities Exchange Act of 1934. DTC holds securities that its participants deposit with it. DTC also facilitates the settlement among its participants of securities transactions, such as transfers and pledges, in deposited securities through electronic computerized book-entry changes in participants’ accounts, thereby eliminating the need for physical movement of securities certificates. Direct participants include securities brokers

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and dealers, banks, trust companies, clearing corporations and other organizations. Access to the DTC system is also available to others, known as indirect participants, such as securities brokers and dealers, banks and trust companies that clear through or maintain custodial relationships with direct participants, either directly or indirectly. The rules applicable to DTC and its participants are on file with the SEC.

Purchases of securities within the DTC system must be made by or through direct participants, which will receive a credit for the securities on DTC’s records. The ownership interest of each actual purchaser of each security, commonly referred to as the beneficial owner, is in turn to be recorded on the direct and indirect participants’ records. Beneficial owners will not receive written confirmation from DTC of their purchases, but beneficial owners are expected to receive written confirmations providing details of the transactions, as well as periodic statements of their holdings, from the direct or indirect participants through which the beneficial owners purchased securities. Transfers of ownership interests in securities issued in the form of global securities are accomplished by entries made on the books of participants acting on behalf of beneficial owners. Beneficial owners will not receive certificates representing their ownership interests in these securities, except if use of the book-entry system for such securities is discontinued.

DTC has no knowledge of the actual beneficial owners of the securities issued in the form of global securities. DTC’s records reflect only the identity of the direct participants to whose accounts such securities are credited, which may or may not be the beneficial owners. The participants will remain responsible for keeping accounts of their holdings on behalf of their customers.

Conveyance of notices and other communications by DTC to direct participants, by direct participants to indirect participants, and by direct participants and indirect participants to beneficial owners, will be governed by arrangements among them, subject to any statutory or regulatory requirements as may be in effect from time to time.

Any redemption notices need to be sent to DTC. If less than all of the securities of a series or class are being redeemed, DTC’s practice is to determine by lot the amount to be redeemed from each participant.

Although voting with respect to securities issued in the form of global securities is limited to the holders of record, when a vote is required, neither DTC nor Cede & Co. will itself consent or vote with respect to such securities. Under its usual procedures, DTC would send an omnibus proxy to the issuer of the securities as soon as possible after the record date. The omnibus proxy assigns Cede & Co.’s consenting or voting rights to those direct participants to whose accounts such securities are credited on the record date, identified in a listing attached to the omnibus proxy.

Payments in respect of securities issued in the form of global securities will be made by the issuer of such securities to DTC. DTC’s practice is to credit direct participants’ accounts on the relevant payment date in accordance with their respective holdings shown on DTC’s records unless DTC has reason to believe that it will not receive payments on such payment date. Payments by participants to beneficial owners will be governed by standing instructions and customary practices and will be the responsibility of such participant and not of DTC or Pioneer, subject to any statutory or regulatory requirements as may be in effect from time to time. Payments to DTC are the responsibility of the issuer of the applicable securities, disbursement of such payments to direct participants is the responsibility of DTC, and disbursements of such payments to the beneficial owners is the responsibility of direct and indirect participants.

DTC may discontinue providing its services as depositary with respect to any securities at any time by giving reasonable notice to the issuer of such securities. If a successor depositary is not obtained, individual security certificates representing such securities are required to be printed and delivered. Pioneer, at its option, may decide to discontinue use of the system of book-entry transfers through DTC or a successor depositary.

The information in this section concerning DTC and DTC’s book-entry system has been obtained from sources that Pioneer believes to be accurate, but Pioneer assumes no responsibility for its accuracy. Pioneer

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has no responsibility for the performance by DTC or its participants of their obligations as described in this prospectus or under the rules and procedures governing their operations.

Debt securities may be issued as registered securities (which will be registered as to principal and interest in the register maintained by the registrar for those senior debt securities) or bearer securities (which will be transferable only by delivery). If debt securities are issuable as bearer securities, certain special limitations and considerations will apply, as set forth in the applicable prospectus supplement.

Reports

Pioneer will deliver to the trustee (unless such reports have been made available on the SEC’s Electronic Data Gathering, Analysis and Retrieval system), within 30 calendar days after Pioneer has filed with the SEC, copies of its annual reports and of the information, documents and other reports (or copies of such portions of any of the foregoing as the SEC may by rules and regulations prescribe) that Pioneer is required to file with the SEC pursuant to Section 13(a) or 15(d) of the Securities Exchange Act of 1934. Pioneer will also comply with the provisions of Section 314(a) of the Trust Indenture Act of 1939.

Pioneer’s Trustee

Pioneer has designated Wells Fargo Bank, National Association, to serve as trustee under the indenture. Wells Fargo Bank, National Association, is also the trustee for Pioneer’s 2008 indenture, including for Pioneer’s 2.875% senior notes due 2038 and 7.500% senior notes due 2020 issued under that indenture, and Pioneer’s 6.65% Senior Notes issued under its 1998 indenture. Pioneer may engage additional or substitute trustees with respect to particular series of Pioneer’s debt securities. Pioneer or Pioneer USA may maintain banking and other commercial relationships with any trustee, including Wells Fargo, National Association and its affiliates in the ordinary course of business. A trustee may own Pioneer’s debt securities.

Governing Law

The indenture and the debt securities are governed by the laws of the State of New York.

DESCRIPTION OF GUARANTEES OF DEBT SECURITIES

Pioneer USA may issue guarantees of debt securities offered by Pioneer in any prospectus supplement. A copy of the guarantee will be filed with the SEC in connection with the offering of guarantees. Each guarantee will be issued under the indenture. The prospectus supplement relating to a particular issue of guarantees will describe the terms of those guarantees, including the following:

•  the series of debt securities to which the guarantees apply;

•  whether the guarantees are secured or unsecured;

•  whether the guarantees are conditional or unconditional;

•  whether the guarantees are senior or subordinate to other guarantees or debt;

•  the terms under which the guarantees may be amended, modified, waived, released or otherwise terminated, if different from the provisions applicable to the guaranteed debt securities;

•  any additional terms of the guarantees; and

•  any other information Pioneer USA thinks is important about the guarantees.

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DESCRIPTION OF CAPITAL STOCK

Pioneer’s authorized capital stock consists of 600,000,000 shares of stock, including:

•  500,000,000 shares of common stock, $.01 par value per share, of which 116,193,197 shares were issued and outstanding as of March 31, 2011; and

•  100,000,000 shares of preferred stock, $.01 par value per share, including 500,000 shares that have been designated as Series A Junior Participating Preferred Stock, $.01 par value per share, in connection with Pioneer’s rights agreement, of which no shares are currently issued or outstanding.

Common Stock

This section describes the general terms of Pioneer’s common stock. For more detailed information, you should refer to Pioneer’s amended and restated certificate of incorporation and amended and restated bylaws, copies of which have been filed with the SEC. These documents are also incorporated by reference into this prospectus.

Holders of Pioneer’s common stock are entitled to one vote per share with respect to each matter submitted to a vote of Pioneer’s stockholders, subject to voting rights that may be established for shares of Pioneer’s preferred stock, if any. Except as may be provided in connection with Pioneer’s preferred stock or as otherwise may be required by law or Pioneer’s amended and restated certificate of incorporation, Pioneer’s common stock is the only capital stock entitled to vote in the election of directors. Pioneer’s common stock does not have cumulative voting rights.

Subject to the rights of holders of Pioneer’s preferred stock, if any, holders of Pioneer’s common stock are entitled to receive dividends and distributions lawfully declared by Pioneer’s board of directors. If Pioneer liquidates, dissolves or winds up its business, whether voluntarily or involuntarily, holders of Pioneer’s common stock will be entitled to receive any assets available for distribution to Pioneer’s stockholders after Pioneer has paid or set apart for payment the amounts necessary to satisfy any preferential or participating rights to which the holders of each outstanding series of preferred stock are entitled by the express terms of such series of preferred stock.

The outstanding shares of Pioneer’s common stock are fully paid and nonassessable. Pioneer’s common stock does not have any preemptive, subscription or conversion rights. Pioneer may issue additional shares of its authorized common stock as it is authorized by its board of directors from time to time, without stockholder approval, except as may be required by applicable stock exchange requirements.

Preferred Stock

This section describes the general terms and provisions of Pioneer’s preferred stock. The applicable prospectus supplement will describe the specific terms of the shares of preferred stock offered through that prospectus supplement, as well as any general terms described in this section that will not apply to those shares of preferred stock. Pioneer will file a copy of the certificate of designations that contains the terms of each new series of preferred stock with the SEC each time Pioneer issues a new series of preferred stock. Each certificate of designations will establish the number of shares included in a designated series and fix the designation, powers, privileges, preferences and rights of the shares of each series as well as any applicable qualifications, limitations or restrictions. You should refer to the applicable certificate of designations as well as Pioneer’s amended and restated certificate of incorporation before deciding to buy shares of Pioneer’s preferred stock as described in the applicable prospectus supplement.

Pioneer’s board of directors has been authorized to provide for the issuance of shares of Pioneer’s preferred stock in multiple series without the approval of stockholders. With respect to each series of Pioneer’s preferred stock, Pioneer’s board of directors has the authority to fix the following terms:

•  the designation of the series;

•  the number of shares within the series;

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•  whether dividends are cumulative and, if cumulative, the dates from which dividends are cumulative;

•  the rate of any dividends, any conditions upon which dividends are payable, and the dates of payment of dividends;

•  whether the shares are redeemable, the redemption price and the terms of redemption;

•  the amount payable to a holder of such shares for each share owned if Pioneer dissolves or liquidates;

•  whether the shares are convertible or exchangeable, the price or rate of conversion or exchange, and the applicable terms and conditions;

•  any restrictions on issuance of shares in the same series or any other series;

•  voting rights applicable to the series of preferred stock; and

•  any other rights, preferences or limitations of such series.

A preferred stockholder’s rights with respect to such holder’s shares of preferred stock will be subordinate to the rights of Pioneer’s general creditors. Shares of Pioneer’s preferred stock that Pioneer issues will be fully paid and nonassessable and will not be entitled to preemptive rights unless specified in the applicable prospectus supplement.

Pioneer’s ability to issue preferred stock, or rights to purchase such shares, could discourage an unsolicited acquisition proposal. For example, Pioneer could impede a business combination by issuing a series of preferred stock containing class voting rights that would enable the holders of such preferred stock to block a business combination transaction. Alternatively, Pioneer could facilitate a business combination transaction by issuing a series of preferred stock having sufficient voting rights to provide a required percentage vote of the stockholders. Additionally, under certain circumstances, Pioneer’s issuance of preferred stock could adversely affect the voting power of the holders of Pioneer’s common stock. Although Pioneer’s board of directors is required to make any determination to issue any preferred stock based on its judgment as to the best interests of Pioneer’s stockholders, Pioneer’s board of directors could act in a manner that would discourage an acquisition attempt or other transaction that some, or a majority, of Pioneer’s stockholders might believe to be in their best interests or in which stockholders might receive a premium for their stock over prevailing market prices of such stock. Pioneer’s board of directors does not at present intend to seek stockholder approval prior to any issuance of currently authorized stock, unless otherwise required by law or applicable stock exchange requirements.

Rights Agreement

Attached to each share of Pioneer’s common stock is one preferred share purchase right. Each right entitles the registered holder to purchase from Pioneer one one-thousandth of a share of Series A Junior Participating Preferred Stock, par value $.01, at a price of $95.00 per one one-thousandth of a share of Series A Junior Participating Preferred Stock, subject to adjustment. The rights expire on July 31, 2011, unless the final expiration date is extended or unless the rights are earlier redeemed by Pioneer.

The rights represented by the certificates for Pioneer’s common stock are not exercisable, and are not separately transferable from the common stock, until the earlier of:

•  ten days after a person or group has become an “acquiring person.” A person or group becomes an acquiring person when the person acquires beneficial ownership of 20% or more of Pioneer’s common stock; or

•  ten business days, or a later date determined by Pioneer’s board of directors, after the commencement or first public announcement of a tender or exchange offer that would result in a person or group beneficially owning 15% or more of Pioneer’s outstanding common stock.

The earlier of these two dates is called the “distribution date.” Separate certificates for the rights will be mailed to holders of record of Pioneer’s common stock as of the distribution date. The rights could then begin trading separately from Pioneer’s common stock.

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Generally, in the event that a person or group becomes an acquiring person, each right, other than the rights owned by the acquiring person, will entitle the holder to receive, upon exercise of the right, common stock having a value equal to two times the exercise price of the right. In the event that Pioneer is acquired in a merger, consolidation or other business combination transaction or more than 50% of Pioneer’s assets, cash flow or earning power is sold or transferred, each right, other than the rights owned by an acquiring person, will entitle the holder to receive, upon the exercise of the right, common stock of the surviving corporation having a value equal to two times the exercise price of the right.

At any time after the acquisition by the acquiring person of beneficial ownership of 20% or more of the outstanding shares of Pioneer’s common stock and before the acquisition by the acquiring person of 50% or more of the voting power of the outstanding shares of Pioneer’s common stock, Pioneer’s board of directors may exchange the rights, other than rights owned by the acquiring person, which would have become void, in whole or in part, at an exchange ratio of one share of Pioneer’s common stock for each two shares of Pioneer’s common stock for which each right is then exercisable, subject to adjustment.

The rights are redeemable in whole, but not in part, at $.001 per right until any person or group becomes an acquiring person. The ability to exercise the rights terminates at the time that Pioneer’s board of directors elects to redeem the rights. Notice of redemption will be given by mail to the registered holders of the rights. At no time will the rights have any voting rights.

The number of outstanding rights, the exercise price payable, and the number of shares of Series A Junior Participating Preferred Stock or other securities or property issuable upon exercise of the rights are subject to customary adjustments from time to time to prevent dilution.

The rights have certain anti-takeover effects. The rights may cause substantial dilution to a person or group that attempts to acquire Pioneer on terms not approved by Pioneer’s board of directors, except in the case of an offer conditioned on a substantial number of rights being acquired. The rights should not interfere with any merger or other business combination that Pioneer’s board of directors approves.

The shares of Series A Junior Participating Preferred Stock that may be purchased upon exercise of the rights will rank junior to all other series of Pioneer’s preferred stock, if any, or any similar stock that specifically provides that it ranks prior to the shares of Series A Junior Participating Preferred Stock. The shares of Series A Junior Participating Preferred Stock will be nonredeemable. Each share of Series A Junior Participating Preferred Stock will be entitled to a minimum preferential quarterly dividend of $1.00 per share, if, as and when declared, but will be entitled to an aggregate dividend of 1,000 times the dividend declared per share of Pioneer’s common stock. In the event of liquidation, the holders of the shares of Series A Junior Participating Preferred Stock will be entitled to a minimum preferential liquidation payment of $1,000 per share, but will be entitled to an aggregate payment of 1,000 times the payment made per share of Pioneer’s common stock. Each share of Series A Junior Participating Preferred Stock will have 1,000 votes, voting together with Pioneer’s common stock. In the event of any merger, consolidation or other transaction in which Pioneer’s common stock is exchanged, each share of Series A Junior Participating Preferred Stock will be entitled to receive 1,000 times the amount and type of consideration received per share of Pioneer’s common stock. These rights are protected by customary anti-dilution provisions. Because of the nature of the Series A Junior Participating Preferred Stock’s dividend, liquidation and voting rights, the value of the interest in a share of Series A Junior Participating Preferred Stock purchasable upon the exercise of each right should approximate the value of one share of Pioneer’s common stock.

The description of the rights contained in this section does not describe every aspect of the rights. The rights agreement dated as of July 20, 2001, between Pioneer and the rights agent, as amended, contains the full legal text of the matters described in this section. A copy of the rights agreement, as amended, has been incorporated by reference in the Registration Statement of which this prospectus forms a part. See “Where You Can Find More Information” for information on how to obtain a copy.

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Limitation on Directors’ Liability

Pioneer’s amended and restated certificate of incorporation provides, as authorized by Section 102(b)(7) of the Delaware General Corporation Law, that a director of Pioneer will not be personally liable to Pioneer or its stockholders for monetary damages for breach of fiduciary duty as a director, except for liability:

•  for any breach of the director’s duty of loyalty to Pioneer or its stockholders;

•  for acts or omission not in good faith or that involve intentional misconduct or a knowing violation of law;

•  for unlawful payments of dividends or unlawful stock repurchases or redemptions as provided in Section 174 of the Delaware General Corporation Law; or

•  for any transaction from which the director derived an improper personal benefit.

The inclusion of this provision in Pioneer’s amended and restated certificate of incorporation may have the effect of reducing the likelihood of derivative litigation against directors, and may discourage or deter stockholders or management from bringing a lawsuit against directors for breach of their duty of care, even though such an action, if successful, might otherwise have benefited Pioneer and its stockholders.

Section 203 of the Delaware General Corporation Law

Section 203 of the Delaware General Corporation Law prohibits a defined set of transactions between a Delaware corporation, such as Pioneer, and an “interested stockholder.” An interested stockholder is defined as a person who, together with any affiliates or associates of such person, beneficially owns, directly or indirectly, 15% or more of the outstanding voting shares of a Delaware corporation. This provision may prohibit business combinations between an interested stockholder and a corporation for a period of three years after the date the interested stockholder becomes an interested stockholder. The term “business combination” is broadly defined to include a broad array of transactions, including mergers, consolidations, sales or other dispositions of assets having a total value in excess of 10% of the consolidated assets of the corporation or all of the outstanding stock of the corporation, and some other transactions that would increase the interested stockholder’s proportionate share ownership in the corporation.

This prohibition is effective unless:

•  the business combination or the transaction that resulted in the stockholder becoming an interested stockholder is approved by the corporation’s board of directors prior to the time the interested stockholder becomes an interested stockholder;

•  the interested stockholder acquired at least 85% of the voting stock of the corporation, other than stock held by directors who are also officers or by qualified employee stock plans, in the transaction in which it becomes an interested stockholder; or

•  the business combination is approved by a majority of the corporation’s board of directors and by the affirmative vote of 662/3% of the outstanding voting stock that is not owned by the interested stockholder.

Special Charter and Bylaw Provisions

Pioneer’s amended and restated certificate of incorporation contains provisions requiring that advance notice be delivered to Pioneer of any business to be brought by a stockholder before an annual meeting of stockholders and providing for certain procedures to be followed by stockholders in nominating persons for election to Pioneer’s board of directors. Generally, such advance notice provisions provide that the stockholder must give written notice to Pioneer’s Secretary not less than 60 days before the scheduled date of the annual meeting of Pioneer’s stockholders or, if later, ten days after the first public notice of the annual meeting is sent to Pioneer’s stockholders. The notice must set forth specific information regarding such stockholder and such business or director nominee, as described in Pioneer’s amended and restated certificate of incorporation. Such requirement is in addition to those set forth in the regulations adopted by the SEC under the Securities

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Exchange Act of 1934. Pioneer’s amended and restated certificate of incorporation provides that, subject to any rights of holders of preferred stock to elect one or more directors, the number of directors shall not be fewer than three or more than 21 and provides for a classified board of directors, consisting of three classes as nearly equal in size as practicable. Each class holds office until the third annual stockholders’ meeting for election of directors following the most recent election of such class. Pioneer’s directors may be removed only for cause.

Pioneer’s amended and restated certificate of incorporation provides that stockholders may not act by written consent in lieu of a meeting. Special meetings of the stockholders may be called by Pioneer’s board of directors, but may not be called by Pioneer’s stockholders. Pioneer’s amended and restated bylaws may be amended by Pioneer’s board of directors or by the affirmative vote of the holders of at least 662/3% of the aggregate voting power of Pioneer’s outstanding capital stock entitled to vote in the election of directors.

Pioneer’s amended and restated certificate of incorporation also contains a “fair price” provision that applies to certain business combination transactions involving any person or group that beneficially owns at least 10% of the aggregate voting power of Pioneer’s outstanding capital stock, referred to as a “related person.” The “fair price” provision requires the affirmative vote of the holders of:

•  at least 80% of Pioneer’s voting stock, and

•  at least 662/3% of Pioneer’s voting stock not beneficially owned by the related person

to approve certain transactions between the related person and Pioneer or its subsidiaries, including any merger, consolidation or share exchange, any sale, lease, exchange, pledge or other disposition of Pioneer’s assets or its subsidiaries having a fair market value of at least $10 million, any transfer or issuance of Pioneer’s securities or its subsidiaries’ securities, any adoption of a plan or proposal by Pioneer of its voluntary liquidation or dissolution, certain reclassifications of Pioneer’s securities or recapitalizations or certain other transactions, in each case involving the related person.

This voting requirement will not apply to certain transactions, including:

•  any transaction in which the consideration to be received by the holders of each class or series of capital stock is:

•  the same in form and amount as that paid in a tender offer in which the related person acquired at least 50% of the outstanding shares of such class or series and which was consummated not more than one year earlier; or

•  not less in amount than the highest per share price paid by the related person for shares of such class or series; and

•  any transaction approved by Pioneer’s continuing directors.

This provision could have the effect of delaying or preventing change in control in a transaction or series of transactions that did not satisfy the “fair price” criteria.

The provisions of Pioneer’s amended and restated certificate of incorporation relating to the limitation of actions taken by written consent and the “fair price” provision may be amended only by the affirmative vote of the holders of at least 80% of the aggregate voting power of Pioneer’s outstanding capital stock entitled to vote for the election of directors.

The foregoing provisions of Pioneer’s amended and restated certificate of incorporation and Pioneer’s amended and restated bylaws, together with the rights agreement and the provisions of Section 203 of the Delaware General Corporation Law, could have the effect of delaying, deferring or preventing a change in control or the removal of existing management, of deterring potential acquirors from making an offer to Pioneer’s stockholders and of limiting any opportunity to realize premiums over prevailing market prices for Pioneer’s common stock in connection therewith. This could be the case notwithstanding that a majority of Pioneer’s stockholders might benefit from such a change in control or offer.

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Transfer Agent and Registrar

Continental Stock Transfer & Trust Company serves as the registrar and transfer agent for the common stock.

Stock Exchange Listing

Pioneer’s common stock is listed on the New York Stock Exchange. The trading symbol for Pioneer’s common stock is “PXD.”

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DESCRIPTION OF DEPOSITARY SHARES

General

Pioneer may offer fractional shares of preferred stock, rather than full shares of preferred stock. If Pioneer does so, Pioneer may issue receipts for depositary shares that each represent a fraction of a share of a particular series of preferred stock. The prospectus supplement will indicate that fraction. The shares of preferred stock represented by depositary shares will be deposited under a depositary agreement between Pioneer and a bank depositary. The phrase “bank depositary” means a bank or trust company that meets certain requirements and is selected by Pioneer. Each owner of a depositary share will be entitled to all the rights and preferences of the preferred stock represented by the depositary share. The depositary shares will be evidenced by depositary receipts issued pursuant to the depositary agreement. Depositary receipts will be distributed to those persons purchasing the fractional shares of preferred stock in accordance with the terms of the offering.

Pioneer has summarized some common provisions of a depositary agreement and the related depositary receipts. The forms of the depositary agreement and the depositary receipts relating to any particular issue of depositary shares will be filed with the SEC each time Pioneer issues depositary shares, and you should read those documents for provisions that may be important to you.

Dividends and Other Distributions

If Pioneer pays a cash distribution or dividend on a series of preferred stock represented by depositary shares, the bank depositary will distribute such dividends to the record holders of such depositary shares. If the distributions are in property other than cash, the bank depositary will distribute the property to the record holders of the depositary shares. However, if the bank depositary determines that it is not feasible to make the distribution of property, the bank depositary may, with Pioneer’s approval, sell such property and distribute the net proceeds from such sale to the record holders of the depositary shares.

Redemption of Depositary Shares

If Pioneer redeems a series of preferred stock represented by depositary shares, the bank depositary will redeem the depositary shares from the proceeds received by the bank depositary in connection with the redemption. The redemption price per depositary share will equal the applicable fraction of the redemption price per share of the preferred stock. If fewer than all the depositary shares are redeemed, the depositary shares to be redeemed will be selected by lot or pro rata as the bank depositary may determine.

Voting the Preferred Stock

Upon receipt of notice of any meeting at which the holders of the preferred stock represented by depositary shares are entitled to vote, the bank depositary will mail the notice to the record holders of the depositary shares relating to such preferred stock. Each record holder of these depositary shares on the record date (which will be the same date as the record date for the preferred stock) may instruct the bank depositary as to how to vote the preferred stock represented by such holder’s depositary shares. The bank depositary will endeavor, insofar as practicable, to vote the amount of the preferred stock represented by such depositary shares in accordance with such instructions, and Pioneer will take all action that the bank depositary deems necessary in order to enable the bank depositary to do so. The bank depositary will abstain from voting shares of the preferred stock to the extent it does not receive specific instructions from the holders of depositary shares representing such preferred stock.

Amendment and Termination of the Depositary Agreement

The form of depositary receipt evidencing the depositary shares and any provision of the depositary agreement may be amended by agreement between the bank depositary and Pioneer. However, any amendment that materially and adversely alters the rights of the holders of depositary shares will not be effective unless such amendment has been approved by the holders of at least a majority of the depositary shares then

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outstanding. The depositary agreement may be terminated by the bank depositary or Pioneer only if (1) all outstanding depositary shares have been redeemed or (2) there has been a final distribution in respect of the preferred stock in connection with any liquidation, dissolution or winding up of Pioneer and such distribution has been distributed to the holders of depositary shares.

Charges of Bank Depositary

Pioneer will pay all transfer and other taxes and governmental charges arising solely from the existence of the depositary arrangements. Pioneer will pay charges of the bank depositary in connection with the initial deposit of the preferred stock and any redemption of the preferred stock. Holders of depositary shares will pay other transfer and other taxes and governmental charges and any other charges, including a fee for the withdrawal of shares of preferred stock upon surrender of depositary receipts, as are expressly provided in the depositary agreement to be payable by such holders.

Withdrawal of Preferred Stock

Except as may be provided otherwise in the applicable prospectus supplement, upon surrender of depositary receipts at the principal office of the bank depositary, subject to the terms of the depositary agreement, the owner of the depositary shares may demand delivery of the number of whole shares of preferred stock and all money and other property, if any, represented by those depositary shares. Partial shares of preferred stock will not be issued. If the depositary receipts delivered by the holder evidence a number of depositary shares in excess of the number of depositary shares representing the number of whole shares of preferred stock to be withdrawn, the bank depositary will deliver to such holder at the same time a new depositary receipt evidencing the excess number of depositary shares. Holders of preferred stock thus withdrawn may not thereafter deposit those shares under the depositary agreement or receive depositary receipts evidencing depositary shares therefor.

Miscellaneous

The bank depositary will forward to holders of depositary shares all reports and communications from Pioneer that are delivered to the bank depositary and that Pioneer is required to furnish to the holders of the preferred stock.

Neither the bank depositary nor Pioneer will be liable if Pioneer is prevented or delayed by law or any circumstance beyond its control in performing its obligations under the depositary agreement. The obligations of the bank depositary and Pioneer under the depositary agreement will be limited to performance in good faith of their respective duties under the depositary agreement, and Pioneer will not be obligated to prosecute or defend any legal proceeding in respect of any depositary shares or preferred stock unless satisfactory indemnity is furnished. Pioneer may rely upon written advice of counsel or accountants, or upon information provided by persons presenting preferred stock for deposit, holders of depositary shares or other persons believed to be competent and on documents believed to be genuine.

Resignation and Removal of Bank Depositary

The bank depositary may resign at any time by delivering to Pioneer notice of its election to do so, and Pioneer may at any time remove the bank depositary. Any such resignation or removal will take effect upon the appointment of a successor bank depositary and its acceptance of such appointment. The successor bank depositary must be appointed within 60 days after delivery of the notice of resignation or removal and must be a bank or trust company meeting the requirements of the depositary agreement.

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DESCRIPTION OF WARRANTS

General Description of Warrants

Pioneer may issue warrants for the purchase of debt securities, preferred stock or common stock. Warrants may be issued independently or together with other securities and may be attached to or separate from any offered securities. Each series of warrants will be issued under a separate warrant agreement to be entered into between Pioneer and a bank or trust company, as warrant agent. The warrant agent will act solely as Pioneer’s agent in connection with the warrants and will not have any obligation or relationship of agency or trust for or with any holders or beneficial owners of warrants. A copy of the warrant agreement will be filed with the SEC in connection with the offering of warrants.

Debt Warrants

The prospectus supplement relating to a particular issue of warrants to purchase debt securities will describe the terms of those warrants, including the following:

•  the title of the warrants;

•  the offering price for the warrants, if any;

•  the aggregate number of the warrants;

•  the designation and terms of the debt securities that may be purchased upon exercise of the warrants;

•  if applicable, the designation and terms of the debt securities that the warrants are issued with and the number of warrants issued with each debt security;

•  if applicable, the date from and after which the warrants and any debt securities issued with them will be separately transferable;

•  the principal amount of debt securities that may be purchased upon exercise of a warrant and the price at which the debt securities may be purchased upon exercise;

•  the dates on which the right to exercise the warrants will commence and expire;

•  if applicable, the minimum or maximum amount of the warrants that may be exercised at any one time;

•  whether the warrants represented by the warrant certificates or the debt securities that may be issued upon exercise of the warrants will be issued in registered or bearer form;

•  information relating to book-entry procedures, if any;

•  the currency or currency units in which the offering price, if any, and the exercise price are payable;

•  if applicable, a discussion of material U.S. federal income tax considerations;

•  anti-dilution provisions of the warrants, if any;

•  redemption or call provisions, if any, applicable to the warrants;

•  any additional terms of the warrants, including terms, procedures and limitations relating to the exchange and exercise of the warrants; and

•  any other information Pioneer thinks is important about the warrants.

Stock Warrants

The prospectus supplement relating to a particular issue of warrants to purchase common stock or preferred stock will describe the terms of the common stock warrants and preferred stock warrants, including the following:

•  the title of the warrants;

•  the offering price for the warrants, if any;

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•  the aggregate number of the warrants;

•  the designation and terms of the common stock or preferred stock that maybe purchased upon exercise of the warrants;

•  if applicable, the designation and terms of the securities that the warrants are issued with and the number of warrants issued with each security;

•  if applicable, the date from and after which the warrants and any securities issued with the warrants will be separately transferable;

•  the number of shares of common stock or preferred stock that may be purchased upon exercise of a warrant and the price at which the shares may be purchased upon exercise;

•  the dates on which the right to exercise the warrants commence and expire;

•  if applicable, the minimum or maximum amount of the warrants that may be exercised at any one time;

•  the currency or currency units in which the offering price, if any, and the exercise price are payable;

•  if applicable, a discussion of material U.S. federal income tax considerations;

•  anti-dilution provisions of the warrants, if any;

•  redemption or call provisions, if any, applicable to the warrants;

•  any additional terms of the warrants, including terms, procedures and limitations relating to the exchange and exercise of the warrants; and

•  any other information Pioneer thinks is important about the warrants.

Exercise of Warrants

Each warrant will entitle the holder of the warrant to purchase at the exercise price set forth in the applicable prospectus supplement the principal amount of debt securities or shares of preferred stock or common stock being offered. Holders may exercise warrants at any time up to the close of business on the expiration date set forth in the applicable prospectus supplement. After the close of business on the expiration date, unexercised warrants are void. Holders may exercise warrants as set forth in the prospectus supplement relating to the warrants being offered.

Until a warrant holder exercises such holder’s warrants to purchase Pioneer’s debt securities, preferred stock or common stock, the holder will not have any rights as a holder of Pioneer’s debt securities, preferred stock or common stock, as the case may be, by virtue of the holder’s ownership of warrants.

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DESCRIPTION OF STOCK PURCHASE CONTRACTS AND
STOCK PURCHASE UNITS

Pioneer may issue stock purchase contracts, including contracts obligating holders to purchase from Pioneer and contracts obligating Pioneer to sell to the holders, a specified number of shares of common stock or other securities at a future date or dates, which Pioneer refers to in this prospectus as “stock purchase contracts.” The price per share of the securities and the number of shares of the securities may be fixed at the time the stock purchase contracts are issued or may be determined by reference to a specific formula set forth in the stock purchase contracts. The stock purchase contracts may be issued separately or as part of units consisting of a stock purchase contract and debt securities, preferred securities, warrants or other securities or debt obligations of third parties, including U.S. treasury securities, securing the holders’ obligations to purchase the securities under the stock purchase contracts, which Pioneer refers to in this prospectus as “stock purchase units.” The stock purchase contracts may require holders to secure their obligations under the stock purchase contracts in a specified manner. The stock purchase contracts also may require Pioneer to make periodic payments to the holders of the stock purchase units or vice versa, and those payments may be unsecured or refunded on some basis.

The stock purchase contracts, and, if applicable, collateral or depositary arrangements, relating to the stock purchase contracts or stock purchase units, will be filed with the SEC in connection with the offering of stock purchase contracts or stock purchase units. The prospectus supplement relating to a particular issue of stock purchase contracts or stock purchase units will describe the terms of those stock purchase contracts or stock purchase units, including the following:

•  if applicable, a discussion of material U.S. federal income tax considerations; and

•  any other information Pioneer thinks is important about the stock purchase contracts or the stock purchase units.

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PLAN OF DISTRIBUTION

Pioneer or Pioneer USA may sell the offered securities in and outside the United States (1) through underwriters or dealers, (2) directly to purchasers, including Pioneer’s affiliates and stockholders, in a rights offering, (3) through agents or (4) through a combination of any of these methods. The prospectus supplement will include the following information:

•  the terms of the offering;

•  the names of any underwriters or agents;

•  the name or names of any managing underwriter or underwriters;

•  the purchase price or initial public offering price of the securities;

•  the net proceeds to Pioneer or Pioneer USA from the sale of the securities;

•  any delayed delivery arrangements;

•  any underwriting discounts, commissions and other items constituting underwriters’ compensation;

•  any discounts or concessions allowed or reallowed or paid to dealers; and

•  any commissions paid to agents.

Sale through Underwriters or Dealers

If underwriters are used in the sale, the underwriters will acquire the securities for their own account for resale to the public, either on a firm commitment basis or a best efforts basis. The underwriters may resell the securities from time to time in one or more transactions, including negotiated transactions, at a fixed public offering price or at varying prices determined at the time of sale. Underwriters may offer securities to the public either through underwriting syndicates represented by one or more managing underwriters or directly by one or more firms acting as underwriters. Unless Pioneer or Pioneer USA informs you otherwise in the prospectus supplement, the obligations of the underwriters to purchase the securities will be subject to certain conditions. The underwriters may change from time to time any initial public offering price and any discounts or concessions allowed or reallowed or paid to dealers.

During and after an offering through underwriters, the underwriters may purchase and sell the securities in the open market. These transactions may include overallotment and stabilizing transactions and purchases to cover syndicate short positions created in connection with the offering. The underwriters may also impose a penalty bid, which means that selling concessions allowed to syndicate members or other broker-dealers for the offered securities sold for their account may be reclaimed by the syndicate if the offered securities are repurchased by the syndicate in stabilizing or covering transactions. These activities may stabilize, maintain or otherwise affect the market price of the offered securities, which may be higher than the price that might otherwise prevail in the open market. If commenced, the underwriters may discontinue these activities at any time.

Some or all of the securities that Pioneer or Pioneer USA offers though this prospectus may be new issues of securities with no established trading market. Any underwriters to whom Pioneer or Pioneer USA sells its securities for public offering and sale may make a market in those securities, but they will not be obligated to do so and they may discontinue any market making at any time without notice. Accordingly, each of Pioneer and Pioneer USA cannot assure you of the liquidity of, or continued trading markets for, any securities that it offers.

If dealers are used in the sale of securities, Pioneer or Pioneer USA will sell the securities to them as principals. The dealers may then resell those securities to the public at varying prices determined by the dealers at the time of resale. Pioneer or Pioneer USA will include in the prospectus supplement the names of the dealers and the terms of the transaction.

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Direct Sales and Sales through Agents

Pioneer or Pioneer USA may sell the securities directly. In this case, no underwriters or agents would be involved. Pioneer or Pioneer USA may also sell the securities through agents designated from time to time. In the prospectus supplement, Pioneer or Pioneer USA will name any agent involved in the offer or sale of the offered securities, and Pioneer or Pioneer USA will describe any commissions payable to the agent. Unless Pioneer or Pioneer USA informs you otherwise in the prospectus supplement, any agent will agree to use its reasonable best efforts to solicit purchases for the period of its appointment.

Pioneer or Pioneer USA may sell the securities directly to institutional investors or others who may be deemed to be underwriters within the meaning of the Securities Act of 1933 with respect to any sale of those securities. Pioneer or Pioneer USA will describe the terms of any such sales in the prospectus supplement.

Pioneer may also make direct sales through subscription rights distributed to its existing stockholders on a pro rata basis, which may or may not be transferable. In any distribution of subscription rights to Pioneer’s stockholders, if all of the underlying securities are not subscribed for, Pioneer may then sell the unsubscribed securities directly to third parties or may engage the services of one or more underwriters, dealers or agents, including standby underwriters, to sell the unsubscribed securities to third parties.

Remarketing Arrangements

Offered securities may also be offered and sold, if so indicated in the applicable prospectus supplement, in connection with a remarketing upon their purchase, in accordance with a redemption or repayment pursuant to their terms, or otherwise, by one or more remarketing firms, acting as principals for their own accounts or as agents for Pioneer or Pioneer USA. Any remarketing firm will be identified and the terms of its agreements, if any, with Pioneer or Pioneer USA and its compensation will be described in the applicable prospectus supplement. Remarketing firms may be deemed to be underwriters, as that term is defined in the Securities Act of 1933, in connection with the securities remarketed.

Delayed Delivery Contracts

If Pioneer or Pioneer USA so indicates in the prospectus supplement, Pioneer or Pioneer USA may authorize agents, underwriters or dealers to solicit offers from certain types of institutions to purchase securities from Pioneer or Pioneer USA at the public offering price under delayed delivery contracts. These contracts would provide for payment and delivery on a specified date in the future. The contracts would be subject only to those conditions described in the prospectus supplement. The prospectus supplement will describe the commission payable for solicitation of those contracts.

General Information

Pioneer or Pioneer USA may have agreements with the agents, dealers, underwriters and remarketing firms to indemnify them against certain civil liabilities, including liabilities under the Securities Act of 1933, or to contribute with respect to payments that the agents, dealers, underwriters or remarketing firms may be required to make. Agents, dealers, underwriters and remarketing firms may be customers of, engage in transactions with, or perform services for Pioneer or Pioneer USA in the ordinary course of their businesses.

LEGAL MATTERS

Except as set forth in the applicable prospectus supplement, Vinson & Elkins L.L.P., Dallas, Texas, will pass upon the validity of Pioneer’s debt securities, common stock, preferred stock, depositary shares, warrants, stock purchase contracts and stock purchase units and Pioneer USA’s guarantees of debt securities.

EXPERTS

The consolidated financial statements of Pioneer Natural Resources Company appearing in Pioneer Natural Resources Company’s Annual Report (Form 10-K) for the year ended December 31, 2010, and the

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effectiveness of Pioneer Natural Resources Company’s internal control over financial reporting as of December 31, 2010, have been audited by Ernst & Young LLP, independent registered public accounting firm, as set forth in their reports thereon, included therein, and incorporated herein by reference. Such consolidated financial statements are incorporated herein by reference in reliance upon such reports given on the authority of such firm as experts in accounting and auditing.

Estimated quantities of our oil and gas reserves and the net present value of such reserves as of December 31, 2010, set forth in or incorporated by reference in this prospectus are based upon reserve reports prepared by us and audited by Netherland, Sewell & Associates, Inc. for our major properties in the United States and reserve reports prepared by our engineers for all other properties. The reserve audit conducted by Netherland, Sewell & Associates, Inc. for our major properties in the United States in aggregate represented 90% of our estimated proved quantities of reserves as of December 31, 2010. We have incorporated these estimates in reliance on the authority of such firm as experts in such matters.

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PART II

INFORMATION NOT REQUIRED IN PROSPECTUS

Item 14.   Other Expenses of Issuance and Distribution

The following are the estimated expenses of the issuance and distribution of the securities being registered, other than selling or underwriting discounts and commissions, all of which are payable by Pioneer Natural Resources Company (“Pioneer”).

Registration fee	$		*
Accountant’s fees and expenses		50,000
Printing expenses		25,000
Legal fees and expenses		50,000
Trustee fees and expenses			*
Miscellaneous		10,000
Total	$	135,000	**

All of the above items are estimates.

*	Deferred in reliance upon Rules 456(b) and 457(r) under the Securities Act of 1933 and not estimable at this time.
**	An estimate of the aggregate expenses in connection with the sale and distribution of the securities being offered will be included in the applicable prospectus supplement.

Item 15.   Indemnification of Directors and Officers

Delaware General Corporation Law

Section 145(a) of the Delaware General Corporation Law provides that a corporation may indemnify any person who was or is a party or is threatened to be made a party to any threatened, pending or completed action, suit or proceeding, whether civil, criminal, administrative or investigative (other than an action by or in the right of the corporation) by reason of the fact that the person is or was a director, officer, employee or agent of the corporation, or is or was serving at the request of the corporation as a director, officer, employee or agent of another corporation, partnership, joint venture, trust or other enterprise against expenses (including attorneys’ fees), judgments, fines and amounts paid in settlement actually and reasonably incurred by the person in connection with the action, suit or proceeding if he acted in good faith and in a manner the person reasonably believed to be in or not opposed to the best interests of the corporation, and, with respect to any criminal action or proceeding, had no reasonable cause to believe the person’s conduct was unlawful.

Section 145(b) of the Delaware General Corporation Law provides that a corporation may indemnify any person who was or is a party or is threatened to be made a party to any threatened, pending or completed action or suit by or in the right of the corporation to procure a judgment in its favor by reason of the fact that the person is or was a director, officer, employee or agent of the corporation, or is or was serving at the request of the corporation as a director, officer, employee or agent of another corporation, partnership, joint venture, trust or other enterprise against expenses (including attorneys’ fees) actually and reasonably incurred by the person in connection with the defense or settlement of the action or suit if the person acted in good faith and in a manner the person reasonably believed to be in or not opposed to the best interests of the corporation and except that no indemnification shall be made in respect of any claim, issue or matter as to which the person shall have been adjudged to be liable to the corporation unless and only to the extent that the Delaware Court of Chancery or the court in which the action or suit was brought shall determine upon application that, despite the adjudication of liability but in view of all the circumstances of the case, the person

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is fairly and reasonably entitled to indemnity for the expenses which the Delaware Court of Chancery or such other court shall deem proper.

Section 145(c) of the Delaware General Corporation Law provides that to the extent that a present or former director or officer of a corporation has been successful on the merits or otherwise in defense of any action, suit or proceeding referred to in Section 145(a) and (b), or in defense of any claim, issue or matter therein, the person shall be indemnified against expenses (including attorneys’ fees) actually and reasonably incurred by the person in connection therewith.

Section 145(d) of the Delaware General Corporation Law provides that any indemnification under Section 145(a) and (b) (unless ordered by a court) shall be made by the corporation only as authorized in the specific case upon a determination that indemnification of the present or former director, officer, employee or agent is proper in the circumstances because the person has met the applicable standard of conduct set forth in Section 145(a) and (b). The determination shall be made, with respect to a person who is a director or officer at the time of such determination, (1) by a majority vote of the directors who are not parties to such action, suit or proceeding, even though less than a quorum, (2) by a committee of such directors designated by majority vote of such directors, even though less than a quorum, (3) if there are no such directors, or if such directors so direct, by independent legal counsel in a written opinion, or (4) by the stockholders.

Section 145(e) of the Delaware General Corporation Law provides that expenses (including attorneys’ fees) incurred by an officer or director in defending any civil, criminal, administrative or investigative action, suit or proceeding may be paid by the corporation in advance of the final disposition of such action, suit or proceeding upon receipt of an undertaking by or on behalf of the director or officer to repay such amount if it shall ultimately be determined that the person is not entitled to be indemnified by the corporation as authorized in Section 145. The expenses (including attorneys’ fees) incurred by former directors and officers or other employees and agents may be so paid upon those terms and conditions, if any, as the corporation deems appropriate.

Section 145(f) of the Delaware General Corporation Law provides that the indemnification and advancement of expenses provided by, or granted pursuant to, Section 145 shall not be deemed exclusive of any other rights to which those seeking indemnification or advancement of expenses may be entitled under any bylaw, agreement, vote of stockholders or disinterested directors or otherwise.

Section 145(g) of the Delaware General Corporation Law provides that a corporation shall have the power to purchase and maintain insurance on behalf of any person who is or was a director, officer, employee or agent of the corporation, or is or was serving at the request of the corporation as a director, officer, employee or agent of another corporation, partnership, joint venture, trust or other enterprise against any liability asserted against the person and incurred by the person in any such capacity, or arising out of the person’s status as such, whether or not the corporation would have the power to indemnify the person against such liability under Section 145.

Section 145(k) of the Delaware General Corporation Law provides that the indemnification and advancement of expenses provided by, or granted pursuant to, Section 145 shall, unless otherwise provided when authorized or ratified, continue as to a person who has ceased to be a director, officer, employee or agent and shall inure to the benefit of the heirs, executors and administrators of such a person.

Amended and Restated Certificate of Incorporation

Article Twelfth of Pioneer’s amended and restated certificate of incorporation provides that each person who at any time is or was a director or officer of Pioneer, or any person who, while a director or officer of Pioneer, is or was serving at Pioneer’s request as a director, officer, partner, venturer, proprietor, trustee, employee, agent or similar functionary of another foreign or domestic corporation, limited liability company, association, partnership, joint venture, sole proprietorship, trust, employee benefit plan or other enterprise, shall be entitled to (1) indemnification and (2) the advancement of expenses incurred by such person from Pioneer as, and to the fullest extent, permitted by the Delaware General Corporation Law or any successor statutory provision, as from time to time amended. Any repeal or modification of Article Twelfth of Pioneer’s amended and restated certificate of incorporation shall be prospective only, and shall not limit the rights of

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any director or officer or the obligations of Pioneer with respect to any claim arising from the services of such director or officer in the capacities described above prior to any such repeal or amendment of Article Twelfth. Article Twelfth further provides that, in the event of the death of any person having a right of indemnification under the foregoing provisions, such right shall inure to the benefit of his or her heirs, executors, administrators and personal representatives. The rights conferred in Article Twelfth of Pioneer’s amended and restated certificate of incorporation are not exclusive of any other right which any person may have or hereafter acquire under any statute, bylaw, resolution of stockholders or directors, agreement or otherwise.

Article Thirteenth of Pioneer’s amended and restated certificate of incorporation provides that Pioneer’s directors shall not be personally liable to Pioneer or any of its stockholders for monetary damages for breach of fiduciary duty as a director involving any act or omission of any such director; provided, however, that such Article Thirteenth does not eliminate or limit the liability of a director (1) for any breach of such director’s duty of loyalty to Pioneer or its stockholders, (2) for acts or omissions not in good faith or which involve intentional misconduct or a knowing violation of law, (3) under Section 174 of the Delaware General Corporation Law (which relates to certain unlawful dividend payments or stock purchases or redemptions), as the same exists or may hereafter be amended, supplemented or replaced, or (4) for a transaction from which the director derived an improper personal benefit. If the Delaware General Corporation Law is amended to authorize the further elimination or limitation of the liability of directors, then the liability of a director, in addition to the limitation on personal liability described above, shall be limited to the fullest extent permitted by the Delaware General Corporation Law, as so amended. Furthermore, any repeal or modification of Article Thirteenth of Pioneer’s amended and restated certificate of incorporation by its stockholders shall be prospective only, and shall not adversely affect any limitation on the personal liability of a director existing at the time of such repeal or modification.

Indemnification Agreements

Pioneer has entered into indemnification agreements with its directors and certain of its officers. Under the terms of the indemnification agreements, Pioneer has generally agreed to indemnify an officer or director for liabilities incurred to the fullest extent permitted by the Delaware General Corporation Law. Also, as permitted under Delaware law, the indemnification agreements require Pioneer to advance expenses in defending any such action provided that the director or executive officer undertakes to repay the amounts if the person ultimately is determined not to be entitled to indemnification from Pioneer. Pioneer has additionally agreed to make the indemnitee whole for taxes imposed on the indemnification payments and for costs in any action to establish indemnitee’s right to indemnification, whether or not wholly successful.

In general, the disinterested directors on the board of Pioneer or a committee of disinterested directors have the authority to determine an indemnitee’s right to indemnification, but the indemnitee can require that independent legal counsel make this determination if a change in control or potential change in control has occurred. In addition, the indemnitee can require Pioneer to establish a trust fund with a third-party trustee sufficient to satisfy the indemnification obligations and expenses if a change in control or potential change in control has occurred.

The indemnification agreements require Pioneer to continue director and officers’ liability insurance coverage for an indemnitee for six years after the indemnitee ceases to be an officer or director, and they obligate Pioneer to procure up to a six-year run-off policy in the event of a change in control or termination of the person in the year following a change in control of Pioneer. The indemnification agreements also limit the period in which Pioneer can bring an action against the indemnitee to three years for breaches of fiduciary duty and to one year for other types of claims.

D&O Liability Insurance.

Pioneer maintains directors’ and officers’ liability insurance.

The above discussion of Section 145 of the Delaware General Corporation Law, Pioneer’s amended and restated certificate of incorporation, the indemnification agreements and Pioneer’s maintenance of directors’ and officers’ liability insurance is not intended to be exhaustive and is respectively qualified in its entirety by such statute and documents.

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Item 16.   Exhibits

The following documents are exhibits to this Registration Statement.

Exhibit No.			Description
	1	.1**	Form of Underwriting Agreement.
	4	.1	Amended and Restated Certificate of Incorporation of Pioneer (incorporated by reference to Exhibit 3.1 to Pioneer’s Registration Statement on Form S-4, Registration No. 333-26951, filed with the SEC on June 26, 1997).
	4	.2	Amended and Restated Bylaws of Pioneer (incorporated by reference to Exhibit 3.1 to Pioneer’s Current Report on Form 8-K, Registration No. 001-13245, filed with the SEC on November 17, 2006).
	4	.3	Rights Agreement, dated as of July 24, 2001, between Pioneer and Continental Stock Transfer & Trust Company, as Rights Agent (incorporated by reference to Exhibit 4.1 to Pioneer’s Registration Statement on Form 8-A, File No. 001-13245, filed with the SEC on July 24, 2001).
	4	.4	Amendment No. 1 to Rights Agreement, dated as of May 22, 2006, between Pioneer and Continental Stock Transfer & Trust Company (incorporated by reference to Exhibit 4.2 to Amendment No. 1 to Pioneer’s Registration Statement on Form 8-A/A, File No. 001-13245, filed with the SEC on May 23, 2006).
	4	.5	Certificate of Designations of Series A Junior Participating Preferred Stock of Pioneer (incorporated by reference to Exhibit A to Exhibit 4.1 to Pioneer’s Registration Statement on Form 8-A, File No. 001-13245, filed with the SEC on July 24, 2001).
	4	.6	Indenture, dated as of January 13, 1998, between Pioneer and The Bank of New York, as trustee (incorporated by reference to Exhibit 99.1 to Pioneer’s and Pioneer USA’s Current Report on Form 8-K, File No. 001-13245, filed with the SEC on January 14, 1998).
	4	.7	First Supplemental Indenture, dated as of January 13, 1998, among Pioneer, Pioneer USA, as the subsidiary guarantor, and The Bank of New York, as trustee, with respect to the indenture identified above as Exhibit 4.6 (incorporated by reference to Exhibit 99.2 to Pioneer’s and Pioneer USA’s Current Report on Form 8-K, File No. 001-13245, filed with the SEC on January 14, 1998).
	4	.8	Second Supplemental Indenture, dated as of April 11, 2000, among Pioneer, Pioneer USA, as the subsidiary guarantor, and The Bank of New York, as trustee, with respect to the indenture identified above as Exhibit 4.6 (incorporated by reference to Exhibit 10.1 to Pioneer’s Quarterly Report on Form 10-Q for the quarter ended March 31, 2000, File No. 001-13245, filed with the SEC on May 11, 2000).
	4	.9	Third Supplemental Indenture, dated as of April 30, 2002, among Pioneer, Pioneer USA, as the subsidiary guarantor, and The Bank of New York, as trustee, with respect to the indenture identified above as Exhibit 4.6 (incorporated by reference to Exhibit 10.4 to Pioneer’s Quarterly Report on Form 10-Q for the quarter ended March 31, 2002, File No. 001-13245, filed with the SEC on May 9, 2007).
	4	.10	Fourth Supplemental Indenture, dated as of July 15, 2004, among Pioneer and The Bank of New York, as trustee, with respect to the indenture identified above as Exhibit 4.6 (incorporated by reference to Exhibit 99.1 to Pioneer’s Current Report on Form 8-K, File No. 001-13245, filed with the SEC on July 19, 2004).
	4	.11	Fifth Supplemental Indenture, dated as of July 15, 2004, among Pioneer, Pioneer USA, as the subsidiary guarantor, and The Bank of New York, as trustee, with respect to the indenture identified above as Exhibit 4.6 (incorporated by reference to Exhibit 99.2 to Pioneer’s Current Report on Form 8-K, File No. 001-13245, filed with the SEC on July 19, 2004).
	4	.12	Sixth Supplemental Indenture, dated as of May 1, 2006, among Pioneer, Pioneer USA and The Bank of New York Trust Company, N.A., as trustee, with respect to the indenture identified above as Exhibit 4.6 (incorporated by reference to Exhibit 4.1 to Pioneer’s Current Report on Form 8-K, File No. 001-13245, filed with the SEC on May 4, 2006).
	4	.13	Seventh Supplemental Indenture, dated as of March 12, 2007, among Pioneer, Pioneer USA, The Bank of New York Trust Company, N.A., as original trustee under the indenture, and Wells Fargo Bank, National Association, as series trustee, with respect to the indenture identified above as Exhibit 4.6 (incorporated by reference to Exhibit 4.1 to Pioneer’s Current Report on Form 8-K, File No. 001-13245, filed with the SEC on March 12, 2007).

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Exhibit No.			Description
	4	.14	Indenture, dated as of January 22, 2008, between Pioneer and Wells Fargo Bank, National Association, as trustee (incorporated by reference to Exhibit 4.1 to Pioneer’s Current Report on Form 8-K, File No. 001-13245, filed with the SEC on January 22, 2008).
	4	.15	First Supplemental Indenture, dated as of January 22, 2008, by and among Pioneer, Pioneer USA and Wells Fargo Bank, National Association, as trustee, with respect to the indenture identified above as Exhibit 4.14 (incorporated by reference to Exhibit 4.2 to Pioneer’s Current Report on Form 8-K, File No. 001-13245, filed with the SEC on January 22, 2008).
	4	.16	Second Supplemental Indenture, dated as of November 9, 2009, by and among Pioneer, Pioneer USA and Wells Fargo Bank, National Association, as trustee, with respect to the indenture identified above as Exhibit 4.14 (incorporated by reference to Exhibit 4.1 to Pioneer’s Current Report on Form 8-K, File No. 001-13245, filed with the SEC on November 13, 2009).
	4	.17	Second Amended and Restated 5-Year Revolving Credit Agreement, dated as of March 31, 2011, among Pioneer, as Borrower, Wells Fargo Bank, National Association, as Administrative Agent, and certain other lenders (incorporated by reference to Exhibit 10.1 to Pioneer’s Current Report on Form 8-K, File No. 001-13245, filed with the SEC on April 5, 2011).
	4	.18*	Form of Debt Indenture between Pioneer and Wells Fargo Bank, National Association, as trustee.
	4	.19**	Form of Debt Securities.
	4	.20**	Form of Depositary Agreement.
	4	.21**	Form of Depositary Receipt.
	4	.22**	Form of Warrant Agreement.
	4	.23**	Form of Warrant Certificate.
	4	.24**	Form of Stock Purchase Contract.
	4	.25**	Form of Stock Purchase Unit.
	4	.26	Form of Certificate of Common Stock, par value $.01 per share, of Pioneer (incorporated by reference to Exhibit 4.1 to Pioneer’s Registration Statement on Form S-4, Registration No. 333-26951, filed with the SEC on June 26, 1997).
	4	.27**	Form of Certificate of Preferred Stock, par value $.01 per share, of Pioneer.
	5	.1*	Opinion of Vinson & Elkins L.L.P. as to the legality of the securities to be registered.
	12	.1	Computation of Ratios of Earnings to Fixed Charges and Earnings to Fixed Charges and Preferred Stock Dividends (incorporated by reference to Exhibit 12.1 to Pioneer’s Amended Quarterly Report on Form 10-Q/A for the quarter ended March 31, 2011, File No. 001-13245, filed with the SEC on May 19, 2011).
	23	.1*	Consent of Ernst & Young LLP.
	23	.2*	Consent of Vinson & Elkins L.L.P. (included in the opinion filed as Exhibit 5.1 to this Registration Statement).
	23	.3*	Consent of Netherland, Sewell & Associates, Inc.
	24	.1*	Powers of Attorney for Pioneer (included on Pioneer’s signature page to this Registration Statement).
	24	.2*	Powers of Attorney for Pioneer USA (included on Pioneer USA’s signature page to this Registration Statement).
	25	.1*	Form T-1 Statement of Eligibility under Trust Indenture Act of 1939 of Wells Fargo, National Association under the Indenture.

*	Filed herewith.
**	To be filed either by amendment or as an exhibit to a document incorporated by reference in this Registration Statement.

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Item 17.   Undertakings

Each of the undersigned registrants hereby undertakes:

(a)(1) To file, during any period in which offers or sales are being made, a post-effective amendment to this Registration Statement:

(i) To include any prospectus required by Section 10(a)(3) of the Securities Act of 1933 (the “Securities Act”);

(ii) To reflect in the prospectus any facts or events arising after the effective date of the Registration Statement (or the most recent post-effective amendment thereof) which, individually or in the aggregate, represent a fundamental change in the information set forth in the Registration Statement. Notwithstanding the foregoing, any increase or decrease in volume of securities offered (if the total dollar value of securities offered would not exceed that which was registered) and any deviation from the low or high end of the estimated maximum offering range may be reflected in the form of prospectus filed with the Securities and Exchange Commission (the “Commission”) pursuant to Rule 424(b) if, in the aggregate, the changes in volume and price represent no more than a 20% change in the maximum aggregate offering price set forth in the “Calculation of Registration Fee” table in the effective Registration Statement; and

(iii) To include any material information with respect to the plan of distribution not previously disclosed in the Registration Statement or any material change to such information in the Registration Statement;

provided, however, that paragraphs (i), (ii) and (iii) do not apply if the information required to be included in a post-effective amendment by those paragraphs is contained in reports filed with or furnished to the Commission by the registrant pursuant to Section 13 or Section 15(d) of the Securities Exchange Act of 1934 that are incorporated by reference in the Registration Statement or is contained in a form of prospectus filed pursuant to Rule 424(b) that is part of the Registration Statement.

(2) That, for the purpose of determining any liability under the Securities Act, each such post-effective amendment shall be deemed to be a new registration statement relating to the securities offered therein, and the offering of such securities at that time shall be deemed to be the initial bona fide offering thereof.

(3) To remove from registration by means of a post-effective amendment any of the securities being registered which remain unsold at the termination of the offering.

(4) That, for the purpose of determining liability under the Securities Act to any purchaser:

(A) Each prospectus filed by the registrants pursuant to Rule 424(b)(3) shall be deemed to be part of the Registration Statement as of the date the filed prospectus was deemed part of and included in the Registration Statement; and

(B) Each prospectus required to be filed pursuant to Rule 424(b)(2), (b)(5) or (b)(7) as part of a registration statement in reliance on Rule 430B relating to an offering made pursuant to Rule 415(a)(1)(i), (vii) or (x) for the purpose of providing the information required by Section 10(a) of the Securities Act shall be deemed to be part of and included in the Registration Statement as of the earlier of the date such form of prospectus is first used after effectiveness or the date of the first contract of sale of securities in the offering described in the prospectus. As provided in Rule 430B, for liability purposes of the issuer and any person that is at that date an underwriter, such date shall be deemed to be a new effective date of the Registration Statement relating to the securities in the Registration Statement to which that prospectus relates, and the offering of such securities at that time shall be deemed to be the initial bona fide offering thereof. Provided, however, that no statement made in a registration statement or prospectus that is part of the Registration Statement or made in a document incorporated or deemed incorporated by reference into the Registration Statement or prospectus that is part of the Registration Statement will, as to a purchaser with a time

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of contract of sale prior to such effective date, supersede or modify any statement that was made in the Registration Statement or prospectus that was part of the Registration Statement or made in any such document immediately prior to such effective date.

(5) That, for the purpose of determining liability of the registrants under the Securities Act to any purchaser in the initial distribution of the securities:

The undersigned registrant undertakes that in a primary offering of securities of the undersigned registrant pursuant to this Registration Statement, regardless of the underwriting method used to sell the securities to the purchaser, if the securities are offered or sold to such purchaser by means of any of the following communications, the undersigned registrant will be a seller to the purchaser and will be considered to offer or sell such securities to such purchaser:

(i) Any preliminary prospectus or prospectus of the undersigned registrant relating to the offering required to be filed pursuant to Rule 424;

(ii) Any free writing prospectus relating to the offering prepared by or on behalf of the undersigned registrant or used or referred to by the undersigned registrant;

(iii) The portion of any other free writing prospectus relating to the offering containing material information about the undersigned registrant or its securities provided by or on behalf of the undersigned registrant; and

(iv) Any other communication that is an offer in the offering made by the undersigned registrant to the purchaser.

(b) That, for purposes of determining any liability under the Securities Act, each filing of the registrant’s annual report pursuant to Section 13(a) or Section 15(d) of the Securities Exchange Act of 1934 (and, where applicable, each filing of an employee benefit plan’s annual report pursuant to Section 15(d) of the Securities Exchange Act of 1934) that is incorporated by reference in the Registration Statement shall be deemed to be a new Registration Statement relating to the securities offered therein, and the offering of such securities at that time shall be deemed to be the initial bona fide offering thereof.

(c) To the extent that the securities are offered to existing security holders pursuant to warrants or rights and any securities not taken by security holders are to be reoffered to the public, to supplement the prospectus, after the expiration of the subscription period, to set forth the results of the subscription offer, the transactions by the underwriters during the subscription period, the amount of unsubscribed securities to be purchased by the underwriters, and the terms of any subsequent reoffering thereof. If any public offering by the underwriters is to be made on terms differing from those set forth on the cover page of the prospectus, a post-effective amendment will be filed to set forth the terms of such offering.

(d) To file an application for the purpose of determining the eligibility of the trustee under the indenture to act under subsection (a) of Section 310 of the Trust Indenture Act (“Act”) in accordance with the rules and regulations prescribed by the Commission under Section 305(b)(2) of the Act.

(e) Insofar as indemnification for liabilities arising under the Securities Act may be permitted to directors, officers and controlling persons of the registrants pursuant to the provisions described under Item 15 above, or otherwise, the registrant has been advised that in the opinion of the Commission, such indemnification is against public policy as expressed in the Securities Act and is, therefore, unenforceable. In the event that a claim for indemnification against such liabilities (other than the payment by the registrant of expenses incurred or paid by a director, officer or controlling person of the registrant in the successful defense of any action, suit or proceeding) is asserted by such director, officer or controlling person in connection with the securities being registered, the registrant will, unless in the opinion of its counsel the matter has been settled by controlling precedent, submit to a court of appropriate jurisdiction the question whether such indemnification by the registrants is against public policy as expressed in the Securities Act and will be governed by the final adjudication of such issue.

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SIGNATURES

Pursuant to the requirements of the Securities Act of 1933, the undersigned registrant certifies that it has reasonable grounds to believe that it meets all of the requirements for filing on Form S-3 and has duly caused this Registration Statement to be signed on its behalf by the undersigned, thereunto duly authorized, in the City of Irving, State of Texas, on May 20, 2011.

PIONEER NATURAL RESOURCES COMPANY

By:  /s/  Richard P. Dealy

Richard P. Dealy

Executive Vice President and Chief Financial Officer

POWER OF ATTORNEY

KNOW ALL PERSONS BY THESE PRESENTS, that each person whose signature appears below hereby constitutes and appoints Scott D. Sheffield, Richard P. Dealy and Frank W. Hall, and each of them, any of whom may act without the joinder of the other, as his true and lawful attorneys-in-fact and agents, with full power of substitution and resubstitution, for him and in his name, place and stead, in any and all capacities, to sign any or all amendments (including post-effective amendments) to this Registration Statement and any Registration Statement (including any amendment thereto) for this offering that is to be effective upon filing pursuant to Rule 462(b) under the Securities Act of 1933, and to file the same, with all exhibits thereto, and all other documents in connection therewith, with the Securities and Exchange Commission, and hereby grants to such attorneys-in-fact and agents, and each of them, full power and authority to do and perform each and every act and thing requisite and necessary to be done, as fully to all intents and purposes as he might or could do in person, hereby ratifying and confirming all that said attorneys-in-fact and agents or any of them, or his or their substitute or substitutes, may lawfully do or cause to be done by virtue hereof.

Pursuant to the requirements of the Securities Act of 1933, this Registration Statement has been signed by the following persons in the capacities and on the dates indicated.

Signature	Title	Date
/s/  Scott D. Sheffield Scott D. Sheffield	Chairman of the Board and Chief Executive Officer (principal executive officer)	May 20, 2011
/s/  Richard P. Dealy Richard P. Dealy	Executive Vice President and Chief Financial Officer (principal financial officer)	May 20, 2011
/s/  Frank W. Hall Frank W. Hall	Vice President and Chief Accounting Officer (principal accounting officer)	May 20, 2011
/s/  Thomas D. Arthur Thomas D. Arthur	Director	May 20, 2011
/s/  Edison C. Buchanan Edison C. Buchanan	Director	May 20, 2011

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Signature	Title	Date
/s/  Andrew F. Cates Andrew F. Cates	Director	May 20, 2011
/s/  R. Hartwell Gardner R. Hartwell Gardner	Director	May 20, 2011
/s/  Andrew D. Lundquist Andrew D. Lundquist	Director	May 20, 2011
/s/  Charles E. Ramsey, Jr. Charles E. Ramsey, Jr.	Director	May 20, 2011
/s/  Scott J. Reiman Scott J. Reiman	Director	May 20, 2011
/s/  Frank A. Risch Frank A. Risch	Director	May 20, 2011
/s/  Jim A. Watson Jim A. Watson	Director	May 20, 2011

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SIGNATURES

Pursuant to the requirements of the Securities Act of 1933, the undersigned registrant certifies that it has reasonable grounds to believe that it meets all of the requirements for filing on Form S-3 and has duly caused this Registration Statement to be signed on its behalf by the undersigned, thereunto duly authorized, in the City of Irving, State of Texas, on May 20, 2011.

PIONEER NATURAL RESOURCES USA, INC.

By:  /s/  Timothy L. Dove

Timothy L. Dove

President and Chief Operating Officer

POWER OF ATTORNEY

KNOW ALL PERSONS BY THESE PRESENTS, that each person whose signature appears below hereby constitutes and appoints Timothy L. Dove, Richard P. Dealy and Frank W. Hall, and each of them, any of whom may act without the joinder of the other, as his true and lawful attorneys-in-fact and agents, with full power of substitution and resubstitution, for him and in his name, place and stead, in any and all capacities, to sign any or all amendments (including post-effective amendments) to this Registration Statement and any Registration Statement (including any amendment thereto) for this offering that is to be effective upon filing pursuant to Rule 462(b) under the Securities Act of 1933, and to file the same, with all exhibits thereto, and all other documents in connection therewith, with the Securities and Exchange Commission, and hereby grants to such attorneys-in-fact and agents, and each of them, full power and authority to do and perform each and every act and thing requisite and necessary to be done, as fully to all intents and purposes as he or she might or could do in person, hereby ratifying and confirming all that said attorneys-in-fact and agents or any of them, or his or their substitute or substitutes, may lawfully do or cause to be done by virtue hereof.

Pursuant to the requirements of the Securities Act of 1933, this Registration Statement has been signed by the following persons in the capacities and on the dates indicated.

Signature	Title	Date
/s/  Timothy L. Dove Timothy L. Dove	Director, President (principal executive officer)	May 20, 2011
/s/  Richard P. Dealy Richard P. Dealy	Director, Executive Vice President and Chief Financial Officer (principal financial officer)	May 20, 2011
/s/  Frank W. Hall Frank W. Hall	Vice President and Chief Accounting Officer (principal accounting officer)	May 20, 2011
/s/  Mark S. Berg Mark S. Berg	Director	May 20, 2011
/s/  Chris J. Cheatwood Chris J. Cheatwood	Director	May 20, 2011

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Signature	Title	Date
/s/  William F. Hannes William F. Hannes	Director	May 20, 2011
/s/  Danny L. Kellum Danny L. Kellum	Director	May 20, 2011
/s/  Jay P. Still Jay P. Still	Director	May 20, 2011

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EXHIBIT INDEX

The following documents are exhibits to this Registration Statement.

Exhibit No.			Description
	1	.1**	Form of Underwriting Agreement.
	4	.1	Amended and Restated Certificate of Incorporation of Pioneer (incorporated by reference to Exhibit 3.1 to Pioneer’s Registration Statement on Form S-4, Registration No. 333-26951, filed with the SEC on June 26, 1997).
	4	.2	Amended and Restated Bylaws of Pioneer (incorporated by reference to Exhibit 3.1 to Pioneer’s Current Report on Form 8-K, Registration No. 001-13245, filed with the SEC on November 17, 2006).
	4	.3	Rights Agreement, dated as of July 24, 2001, between Pioneer and Continental Stock Transfer & Trust Company, as Rights Agent (incorporated by reference to Exhibit 4.1 to Pioneer’s Registration Statement on Form 8-A, File No. 001-13245, filed with the SEC on July 24, 2001).
	4	.4	Amendment No. 1 to Rights Agreement, dated as of May 22, 2006, between Pioneer and Continental Stock Transfer & Trust Company (incorporated by reference to Exhibit 4.2 to Amendment No. 1 to Pioneer’s Registration Statement on Form 8-A/A, File No. 001-13245, filed with the SEC on May 23, 2006).
	4	.5	Certificate of Designations of Series A Junior Participating Preferred Stock of Pioneer (incorporated by reference to Exhibit A to Exhibit 4.1 to Pioneer’s Registration Statement on Form 8-A, File No. 001-13245, filed with the SEC on July 24, 2001).
	4	.6	Indenture, dated as of January 13, 1998, between Pioneer and The Bank of New York, as trustee (incorporated by reference to Exhibit 99.1 to Pioneer’s and Pioneer USA’s Current Report on Form 8-K, File No. 001-13245, filed with the SEC on January 14, 1998).
	4	.7	First Supplemental Indenture, dated as of January 13, 1998, among Pioneer, Pioneer USA, as the subsidiary guarantor, and The Bank of New York, as trustee, with respect to the indenture identified above as Exhibit 4.6 (incorporated by reference to Exhibit 99.2 to Pioneer’s and Pioneer USA’s Current Report on Form 8-K, File No. 001-13245, filed with the SEC on January 14, 1998).
	4	.8	Second Supplemental Indenture, dated as of April 11, 2000, among Pioneer, Pioneer USA, as the subsidiary guarantor, and The Bank of New York, as trustee, with respect to the indenture identified above as Exhibit 4.6 (incorporated by reference to Exhibit 10.1 to Pioneer’s Quarterly Report on Form 10-Q for the quarter ended March 31, 2000, File No. 001-13245, filed with the SEC on May 11, 2000).
	4	.9	Third Supplemental Indenture, dated as of April 30, 2002, among Pioneer, Pioneer USA, as the subsidiary guarantor, and The Bank of New York, as trustee, with respect to the indenture identified above as Exhibit 4.6 (incorporated by reference to Exhibit 10.4 to Pioneer’s Quarterly Report on Form 10-Q for the quarter ended March 31, 2002, File No. 001-13245, filed with the SEC on May 9, 2007).
	4	.10	Fourth Supplemental Indenture, dated as of July 15, 2004, among Pioneer and The Bank of New York, as trustee, with respect to the indenture identified above as Exhibit 4.6 (incorporated by reference to Exhibit 99.1 to Pioneer’s Current Report on Form 8-K, File No. 001-13245, filed with the SEC on July 19, 2004).
	4	.11	Fifth Supplemental Indenture, dated as of July 15, 2004, among Pioneer, Pioneer USA, as the subsidiary guarantor, and The Bank of New York, as trustee, with respect to the indenture identified above as Exhibit 4.6 (incorporated by reference to Exhibit 99.2 to Pioneer’s Current Report on Form 8-K, File No. 001-13245, filed with the SEC on July 19, 2004).
	4	.12	Sixth Supplemental Indenture, dated as of May 1, 2006, among Pioneer, Pioneer USA and The Bank of New York Trust Company, N.A., as trustee, with respect to the indenture identified above as Exhibit 4.6 (incorporated by reference to Exhibit 4.1 to Pioneer’s Current Report on Form 8-K, File No. 001-13245, filed with the SEC on May 4, 2006).
	4	.13	Seventh Supplemental Indenture, dated as of March 12, 2007, among Pioneer, Pioneer USA, The Bank of New York Trust Company, N.A., as original trustee under the indenture, and Wells Fargo Bank, National Association, as series trustee, with respect to the indenture identified above as Exhibit 4.6 (incorporated by reference to Exhibit 4.1 to Pioneer’s Current Report on Form 8-K, File No. 001-13245, filed with the SEC on March 12, 2007).

Exhibit No.			Description
	4	.14	Indenture, dated as of January 22, 2008, between Pioneer and Wells Fargo Bank, National Association, as trustee (incorporated by reference to Exhibit 4.1 to Pioneer’s Current Report on Form 8-K, File No. 001-13245, filed with the SEC on January 22, 2008).
	4	.15	First Supplemental Indenture, dated as of January 22, 2008, by and among Pioneer, Pioneer USA and Wells Fargo Bank, National Association, as trustee, with respect to the indenture identified above as Exhibit 4.14 (incorporated by reference to Exhibit 4.2 to Pioneer’s Current Report on Form 8-K, File No. 001-13245, filed with the SEC on January 22, 2008).
	4	.16	Second Supplemental Indenture, dated as of November 9, 2009, by and among Pioneer, Pioneer USA and Wells Fargo Bank, National Association, as trustee, with respect to the indenture identified above as Exhibit 4.14 (incorporated by reference to Exhibit 4.1 to Pioneer’s Current Report on Form 8-K, File No. 001-13245, filed with the SEC on November 13, 2009).
	4	.17	Second Amended and Restated 5-Year Revolving Credit Agreement, dated as of March 31, 2011, among Pioneer, as Borrower, Wells Fargo Bank, National Association, as Administrative Agent, and certain other lenders (incorporated by reference to Exhibit 10.1 to Pioneer’s Current Report on Form 8-K, File No. 001-13245, filed with the SEC on April 5, 2011).
	4	.18*	Form of Debt Indenture between Pioneer and Wells Fargo Bank, National Association, as trustee.
	4	.19**	Form of Debt Securities.
	4	.20**	Form of Depositary Agreement.
	4	.21**	Form of Depositary Receipt.
	4	.22**	Form of Warrant Agreement.
	4	.23**	Form of Warrant Certificate.
	4	.24**	Form of Stock Purchase Contract.
	4	.25**	Form of Stock Purchase Unit.
	4	.26	Form of Certificate of Common Stock, par value $.01 per share, of Pioneer (incorporated by reference to Exhibit 4.1 to Pioneer’s Registration Statement on Form S-4, Registration No. 333-26951, filed with the SEC on June 26, 1997).
	4	.27**	Form of Certificate of Preferred Stock, par value $.01 per share, of Pioneer.
	5	.1*	Opinion of Vinson & Elkins L.L.P. as to the legality of the securities to be registered.
	12	.1	Computation of Ratios of Earnings to Fixed Charges and Earnings to Fixed Charges and Preferred Stock Dividends (incorporated by reference to Exhibit 12.1 to Pioneer’s Amended Quarterly Report on Form 10-Q/A for the quarter ended March 31, 2011, File No. 001-13245, filed with the SEC on May 19, 2011).
	23	.1*	Consent of Ernst & Young LLP.
	23	.2*	Consent of Vinson & Elkins L.L.P. (included in the opinion filed as Exhibit 5.1 to this Registration Statement).
	23	.3*	Consent of Netherland, Sewell & Associates, Inc.
	24	.1*	Powers of Attorney for Pioneer (included on Pioneer’s signature page to this Registration Statement).
	24	.2*	Powers of Attorney for Pioneer USA (included on Pioneer USA’s signature page to this Registration Statement).
	25	.1*	Form T-1 Statement of Eligibility under Trust Indenture Act of 1939 of Wells Fargo, National Association under the Indenture.

*	Filed herewith.
**	To be filed either by amendment or as an exhibit to a document incorporated by reference in this Registration Statement.

EX-4.18

Exhibit 4.18

PIONEER NATURAL RESOURCES COMPANY
and
WELLS FARGO BANK, NATIONAL ASSOCIATION,
as Trustee

Indenture
Dated as of                     , 20__

Debt Securities

TABLE OF CONTENTS^*

ARTICLE I
DEFINITIONS
Section 1.01 Certain Terms Defined	1
Section 1.02 Incorporation by Reference of Trust Indenture Act	8
Section 1.03 Rules of Construction	8
ARTICLE II
DEBT SECURITIES
Section 2.01 Forms Generally	8
Section 2.02 Form of Trustee’s Certificate of Authentication	9
Section 2.03 Principal Amount; Issuable in Series	9
Section 2.04 Execution of Debt Securities	12
Section 2.05 Authentication and Delivery of Debt Securities	12
Section 2.06 Denomination of Debt Securities	13
Section 2.07 Registration of Transfer and Exchange	13
Section 2.08 Temporary Debt Securities	15
Section 2.09 Mutilated, Destroyed, Lost or Stolen Debt Securities	16
Section 2.10 Cancellation of Surrendered Debt Securities	16
Section 2.11 Provisions of the Indenture and Debt Securities for the Sole Benefit of the Parties and the Holders	17
Section 2.12 Payment of Interest; Interest Rights Preserved	17
Section 2.13 Securities Denominated in Foreign Currencies	18
Section 2.14 Wire Transfers	18
Section 2.15 Securities Issuable in the Form of a Global Security	18
Section 2.16 Medium Term Securities	21
Section 2.17 Defaulted Interest	21
Section 2.18 Judgments	22
Section 2.19 CUSIP and ISIN Numbers	23
ARTICLE III
REDEMPTION OF DEBT SECURITIES
Section 3.01 Applicability of Article	23
Section 3.02 Tax Redemption; Special Tax Redemption	23
Section 3.03 Notice of Redemption; Selection of Debt Securities	25
Section 3.04 Payment of Debt Securities Called for Redemption	26
Section 3.05 Mandatory and Optional Sinking Funds	27
Section 3.06 Redemption of Debt Securities for Sinking Fund	27

* The Table of Contents is not part of the Indenture.

i

ARTICLE IV
PARTICULAR COVENANTS OF THE COMPANY
Section 4.01 Payment of Principal of, and Premium, If Any, and Interest on, Debt Securities	28
Section 4.02 Maintenance of Offices or Agencies for Registration of Transfer, Exchange and Payment of Debt Securities	29
Section 4.03 Appointment to Fill a Vacancy in the Office of Trustee	29
Section 4.04 Duties of Paying Agents, Etc.	30
Section 4.05 Statement by Officers as to Default	30
Section 4.06 Payment of Additional Interest	31
Section 4.07 SEC Reports; Notice of Defaults	32
Section 4.08 Further Instruments and Acts	32
Section 4.09 Existence	33
Section 4.10 Maintenance of Properties	33
Section 4.11 Payment of Taxes and Other Claims	33
Section 4.12 Waiver of Certain Covenants	33
ARTICLE V
HOLDERS’ LISTS AND REPORTS BY THE TRUSTEE
Section 5.01 Company to Furnish Trustee Information as to Names and Addresses of Holders; Preservation of Information	33
Section 5.02 Communications to Holders	34
Section 5.03 Reports by Trustee	34
Section 5.04 Record Dates for Action by Holders	34
ARTICLE VI
REMEDIES OF THE TRUSTEE AND HOLDERS IN EVENT OF DEFAULT
Section 6.01 Events of Default	34
Section 6.02 Collection of Indebtedness by Trustee, Etc.	36
Section 6.03 Application of Money Collected by Trustee	37
Section 6.04 Limitation on Suits by Holders	38
Section 6.05 Remedies Cumulative; Delay or Omission in Exercise of Rights Not a Waiver of Default	39
Section 6.06 Rights of Holders of Majority in Principal Amount of Debt Securities to Direct Trustee and to Waive Default	39
Section 6.07 Trustee to Give Notice of Events of Default Known to It, but May Withhold Such Notice in Certain  Circumstances	39
Section 6.08 Requirement of an Undertaking to Pay Costs in Certain Suits under the Indenture or Against the Trustee	40

ii

ARTICLE VII
CONCERNING THE TRUSTEE
Section 7.01 Certain Duties and Responsibilities	40
Section 7.02 Certain Rights of Trustee	41
Section 7.03 Trustee Not Liable for Recitals in Indenture or in Debt Securities	42
Section 7.04 Trustee, Paying Agent or Registrar May Own Debt Securities	42
Section 7.05 Money Received by Trustee to be Held in Trust	42
Section 7.06 Compensation and Reimbursement	42
Section 7.07 Right of Trustee to Rely on an Officers’ Certificate Where No Other Evidence Specifically Prescribed	43
Section 7.08 Separate Trustee; Replacement of Trustee	43
Section 7.09 Successor Trustee by Merger	44
Section 7.10 Eligibility; Disqualification	44
Section 7.11 Preferential Collection of Claims Against Company	44
Section 7.12 Compliance with Tax Laws	44
ARTICLE VIII
CONCERNING THE HOLDERS
Section 8.01 Evidence of Action by Holders	45
Section 8.02 Proof of Execution of Instruments and of Holding of Debt Securities	45
Section 8.03 Who May be Deemed Owner of Debt Securities	45
Section 8.04 Instruments Executed by Holders Bind Future Holders	46
ARTICLE IX
SUPPLEMENTAL INDENTURES
Section 9.01 Purposes for Which Supplemental Indenture May be Entered into Without Consent of Holders	46
Section 9.02 Modification of Indenture with Consent of Holders of Debt Securities	48
Section 9.03 Effect of Supplemental Indentures	49
Section 9.04 Debt Securities May Bear Notation of Changes by Supplemental Indentures	49
ARTICLE X
CONSOLIDATION, MERGER, SALE OR CONVEYANCE
Section 10.01 Consolidations and Mergers of the Company	50
Section 10.02 Rights and Duties of Successor Corporation	50
ARTICLE XI
SATISFACTION AND DISCHARGE OF INDENTURE; DEFEASANCE; UNCLAIMED MONEY
Section 11.01 Applicability of Article	51
Section 11.02 Satisfaction and Discharge of Indenture; Defeasance	51
Section 11.03 Conditions of Defeasance	52

iii

Section 11.04 Application of Trust Money	52
Section 11.05 Repayment to Company	53
Section 11.06 Indemnity for U.S. Government Obligations	53
Section 11.07 Reinstatement	53
ARTICLE XII
SUBORDINATION OF DEBT SECURITIES
Section 12.01 Applicability of Article; Agreement to Subordinate	53
Section 12.02 Liquidation, Dissolution, Bankruptcy	53
Section 12.03 Default on Senior Indebtedness	54
Section 12.04 Acceleration of Payment of Debt Securities	54
Section 12.05 When Distribution Must be Paid Over	54
Section 12.06 Subrogation	55
Section 12.07 Relative Rights	55
Section 12.08 Subordination May Not be Impaired by Company	55
Section 12.09 Rights of Trustee and Paying Agent	55
Section 12.10 Distribution or Notice to Representative	55
Section 12.11 Article XII Not to Prevent Defaults or Limit Right to Accelerate	55
Section 12.12 Trust Money Not Subordinated	55
Section 12.13 Trustee Entitled to Rely	56
Section 12.14 Trustee to Effectuate Subordination	56
Section 12.15 Trustee Not Fiduciary for Holders of Senior Indebtedness	56
Section 12.16 Reliance by Holders of Senior Indebtedness on Subordination Provisions	56
ARTICLE XIII
MISCELLANEOUS PROVISIONS
Section 13.01 Successors and Assigns of Company Bound by Indenture	56
Section 13.02 Acts of Board, Committee or Officer of Successor Company Valid	56
Section 13.03 Notices, Demands, Etc. to the Trustee or the Company	57
Section 13.04 Notices to Holders; Waiver	57
Section 13.05 Indenture and Debt Securities to be Construed in Accordance with the Laws of the State of New York	58
Section 13.06 Officers’ Certificate and Opinion of Counsel to be Furnished upon Application or Demand by the Company	58
Section 13.07 Payments Due on Legal Holidays	58
Section 13.08 Provisions Required by Trust Indenture Act to Control	58
Section 13.09 Computation of Interest on Debt Securities	58
Section 13.10 Rules by Trustee, Paying Agent and Registrar	59
Section 13.11 No Recourse Against Others	59
Section 13.12 Severability	59
Section 13.13 Effect of Headings	59
Section 13.14 Indenture May be Executed in Counterparts	59

iv

PIONEER NATURAL RESOURCES COMPANY

CROSS REFERENCE SHEET^*

This Cross Reference Sheet shows the location in the Indenture of the provisions inserted pursuant to Sections 310-318(a), inclusive, of the Trust Indenture Act of 1939.

		Indenture
TIA Section		Section
310	(a)	7.10
	(b)	7.10
	(c)	N.A.**
311	(a)	7.11
	(b)	7.11
	(c)	N.A.
312	(a)	5.01
	(b)	5.02
	(c)	5.02
313	(a)	5.03
	(b)	5.03
	(c)	13.03
	(d)	5.03
314	(a)	4.07
	(b)	N.A.
	(c)(1)	13.05
	(c)(2)	13.05
	(c)(3)	N.A.
	(d)	N.A.
	(e)	13.05
	(f)	4.06
315	(a)	7.01
	(b)	6.07 & 13.03
	(c)	7.01
	(d)	7.01
	(e)	6.08
316	(a) (last sentence)	1.01
	(a)(1)(A)	6.06
	(a)(1)(B)	6.06
	(a)(2)	9.01(d)
	(b)	6.04
	(c)	5.04
317	(a)(1)	6.02
	(a)(2)	6.02
	(b)	4.04

v

		Indenture
TIA Section		Section
318	(a)	13.07

*	The Cross Reference Sheet is not part of the Indenture.
**	N.A. means not applicable.

vi

     INDENTURE dated as of __________, between PIONEER NATURAL RESOURCES COMPANY, a corporation duly organized and existing under the laws of the State of Delaware (hereinafter sometimes called the “Company”), and WELLS FARGO BANK, NATIONAL ASSOCIATION, a national banking association organized under the laws of the United States of America (hereinafter sometimes called the “Trustee”).

RECITALS OF THE COMPANY

     The Company has duly authorized the execution and delivery of this Indenture to provide for the issuance from time to time of its debentures, notes, bonds or other evidences of indebtedness to be issued in one or more series unlimited as to principal amount (herein called the “Debt Securities”), as in this Indenture provided.

     All things necessary to make this Indenture a valid agreement of the Company, in accordance with its terms, have been done.

     NOW, THEREFORE, THIS INDENTURE WITNESSETH

     That in order to declare the terms and conditions upon which the Debt Securities are authenticated, issued and delivered, and in consideration of the premises, and of the purchase and acceptance of the Debt Securities by the holders thereof, the Company and the Trustee covenant and agree with each other, for the benefit of the respective Holders from time to time of the Debt Securities or any series thereof, as follows:

ARTICLE I
DEFINITIONS

     Section 1.01 Certain Terms Defined. The terms defined in this Section 1.01 (except as herein otherwise expressly provided or unless the context otherwise requires) for all purposes of this Indenture and of any indenture supplemental hereto shall have the respective meanings specified in this Section 1.01. All other terms used in this Indenture which are defined in the Trust Indenture Act or which are by reference therein defined in the Securities Act (except as herein otherwise expressly provided or unless the context otherwise requires) shall have the meanings assigned to such terms in the Trust Indenture Act and in the Securities Act as in force as of the date of original execution of this Indenture.

     “Affiliate” of any specified Person means any other Person, directly or indirectly, controlling or controlled by or under direct or indirect common control with such specified Person. For the purposes of this definition, “control” when used with respect to any Person means the power to direct the management and policies of such Person, directly or indirectly, whether through the ownership of voting securities, by contract or otherwise; and the terms “controlling” and “controlled” have meanings correlative to the foregoing. The Trustee may request and may conclusively rely upon an Officers’ Certificate to determine whether any Person is an Affiliate of any specified Person.

     “Authorized Newspaper” means a newspaper in an official language of the country of publication customarily published at least once a day, and customarily published for at least five days in each calendar week, and of general circulation in such city or cities specified pursuant to Section 2.03 with respect to the Debt Securities of any series. Where successive publications are required to be made in Authorized Newspapers, the successive publications may be made in the same or in different newspapers in the same city meeting the foregoing requirements and in each case on any business day in such city.

     “Bank Indebtedness” means any and all amounts payable under or in respect of the Credit Agreement, as supplemented, amended or modified from time to time, including principal, premium (if any), interest (including interest accruing on or after the filing of any petition in bankruptcy or for reorganization relating to the Company whether or not a claim for post-filing interest is allowed in such proceedings), fees, charges, expenses, reimbursement obligations, guarantees and all other amounts payable thereunder or in respect thereof.

1

     “Bearer Holder” means, with respect to any Bearer Security or Coupon, the bearer thereof.

     “Bearer Security” means any Debt Security (with or without Coupons), title to which passes by delivery only, but does not include any Coupons.

     “Board of Directors” means either the Board of Directors of the Company or any duly authorized committee or subcommittee of such Board, except as the context may otherwise require.

     “business day” means, when used with respect to any Place of Payment specified pursuant to Section 2.03, any day that is not a Saturday, a Sunday or a legal holiday or a day on which banking institutions or trust companies in such Place of Payment are authorized or obligated by law to close, except as otherwise specified pursuant to Section 2.03.

     “Capital Stock” of any Person means any and all shares, rights to purchase, warrants or options (whether or not currently exercisable), participations or other equivalents of or interests (including partnership interests) in (however designated) the equity (which includes, but is not limited to, common stock, Preferred Stock and partnership and joint venture interests) of such Person (excluding any debt securities that are convertible into, or exchangeable for, such equity).

     “Commodity Price Protection Agreement” means, in respect of any Person, any forward contract, commodity swap agreement, commodity option agreement or other similar agreement or arrangement designed to protect such Person against fluctuations in commodity prices.

     “Common Stock” means the common stock, par value $.01 per share, of the Company, which stock is currently listed on the New York Stock Exchange.

     “Company” means Pioneer Natural Resources Company, a Delaware corporation, and, subject to the provisions of Article X, shall also include its successors and assigns.

     “Company Order” means a written order of the Company, signed by its Chairman of the Board, Vice Chairman of the Board, Chief Executive Officer, President, Chief Operating Officer, Chief Financial Officer, Secretary or any Vice President.

     “corporate trust office of the Trustee” or other similar term means the office of the Trustee in Dallas, Texas, at which the corporate trust business of the Trustee shall, at any particular time, be principally administered in the United States of America, which is on the date hereof at 201 Main Street, Third Floor, Fort Worth, Texas 76102; Attention: Corporate Trust, except that with respect to the presentation of Debt Securities for payment or for registration of transfer and exchange, such term shall also mean the office of the Trustee in Minneapolis, Minnesota, in each case at which at any particular time its corporate agency business shall be conducted.

     “Coupon” means any interest coupon appertaining to any Bearer Security.

     “Coupon Security” means any Bearer Security authenticated and delivered with one or more Coupons appertaining thereto.

     “covenant defeasance option” has the meaning set forth in Section 11.02(b).

     “Credit Agreement” means the Second Amended and Restated Credit Facility Agreement, dated as of March 31, 2011, among the Company, as Borrower, Wells Fargo Bank, National Association, as Administrative Agent, Wells Fargo Bank, National Association, Bank of America, N.A. and JPMorgan Chase Bank, N.A., as Issuing Banks, Wells Fargo Bank, National Association, Bank of America, N.A. and JPMorgan Chase Bank, N.A., as Swingline Lenders, the Lenders party thereto, Bank of America, N.A. and JPMorgan Chase Bank, N.A., as Co-Syndication Agents, Bank of Montreal and Citibank N.A., as Co-Documentation Agents, and Wells Fargo Securities, LLC, Merrill Lynch, Pierce, Fenner & Smith Incorporated and J.P. Morgan Securities LLC, as Co-Arrangers and Joint Bookrunners, as supplemented, amended or modified or Refinanced from time to time. It is understood and agreed that the Credit Agreement may be Refinanced, refunded, extended, renewed or replaced (through one or more such

2

Refinancings, refundings, extensions, renewals or replacements), as a whole, or in part, from time to time before, at or after the termination of the applicable Credit Agreement.

     “Currency” means Dollars or Foreign Currency.

     “Currency Exchange Protection Agreement” means, in respect of any Person, any foreign exchange contract, currency swap agreement, currency option or other similar agreement or arrangement designed to protect such Person against fluctuations in currency exchange rates.

     “Debt Security” or “Debt Securities” has the meaning stated in the first recital of this Indenture and more particularly means any debt security or debt securities, as the case may be of any series authenticated and delivered under this Indenture.

     “Debt Security Register” has the meaning set forth in Section 2.07(a).

     “Default” means any event which is, or after notice or passage of time or both would be, an Event of Default.

     “Defaulted Interest” has the meaning set forth in Section 2.17(a).

     “Depositary” means, unless otherwise specified by the Company pursuant to either Section 2.03 or 2.15, with respect to registered Debt Securities of any series issuable or issued in whole or in part in the form of one or more Global Securities, The Depository Trust Company, New York, New York, or any successor thereto registered as a clearing agency under the Exchange Act or other applicable statute or regulations.

     “Designated Senior Indebtedness” means (a) the Bank Indebtedness and (b) any other Senior Indebtedness that, at the date of determination, has an aggregate principal amount outstanding of, or under which, at the date of determination, the holders thereof are committed to lend up to, at least $100 million and is specifically designated by the Company in the instrument evidencing or governing such Senior Indebtedness as “Designated Senior Indebtedness” for purposes of this Indenture or has been designated as “Designated Senior Indebtedness” for purposes of this Indenture in an Officers’ Certificate received by the Trustee.

     “Dollar” or “$” means such currency of the United States as at the time of payment is legal tender for the payment of public and private debts.

     “Dollar Equivalent” means, with respect to any monetary amount in a Foreign Currency, at any time for the determination thereof, the amount of Dollars obtained by converting such Foreign Currency involved in such computation into Dollars at the spot rate for the purchase of Dollars with the applicable Foreign Currency as quoted by Bankers Trust Company (unless another comparable financial institution is designated by the Company) in New York, New York at approximately 11:00 a.m. (New York time) on the date two business days prior to such determination.

     “European Currency Units” has the meaning assigned to it from time to time by the Council of the European Communities, or its successor in the European Union.

     “European Communities” means the European Economic Community, the European Coal and Steel Community and the European Atomic Energy Community, or their successors in the European Union.

     “Event of Default” has the meaning specified in Section 6.01.

     “Exchange Act” means the Securities Exchange Act of 1934 and any successor statute.

     “Foreign Currency” means a currency issued by the government of any country other than the United States or a composite currency the value of which is determined by reference to the values of the currencies of any group of countries.

3

     “GAAP” means generally accepted accounting principles in the United States as in effect on the date on which the Debt Securities of the applicable series are issued, including those set forth in (a) the opinions and pronouncements of the Accounting Principles Board of the American Institute of Certified Public Accountants, (b) statements and pronouncements of the Financial Accounting Standards Board, (c) such other statements by such other entity as approved by a significant segment of the accounting profession and (d) the rules and regulations of the SEC governing the inclusion of financial statements (including pro forma financial statements) in periodic reports required to be filed pursuant to Section 13 of the Exchange Act, including opinions and pronouncements in staff accounting bulletins and similar written statements from the accounting staff of the SEC. All ratios and computations based on GAAP contained in this Indenture shall be computed in conformity with GAAP consistently applied.

     “Global Security” means, with respect to any series of Debt Securities issued hereunder, a Debt Security which is executed by the Company and authenticated and delivered by the Trustee to the Depositary or pursuant to the Depositary’s instruction, all in accordance with this Indenture and any indentures supplemental hereto, or resolution of the Board of Directors and set forth in an Officers’ Certificate, which shall be registered in the name of the Depositary or its nominee and which shall represent, and shall be denominated in an amount equal to the aggregate principal amount of, all the Outstanding Debt Securities of such series or any portion thereof, in either case having the same terms, including, without limitation, the same original issue date, date or dates on which principal is due and interest rate or method of determining interest.

     “Guarantee” means any obligation, contingent or otherwise, of any Person directly or indirectly guaranteeing any Indebtedness or other obligation of any other Person and any obligation, direct or indirect, contingent or otherwise, of such Person (a) to purchase or pay (or advance or supply funds for the purchase or payment of) such Indebtedness or other obligation of such other Person (whether arising by virtue of partnership arrangements, or by agreement to keep-well, to purchase assets, goods, securities or services, to take-or-pay, or to maintain financial statement conditions or otherwise) or (b) entered into for purposes of assuring in any other manner the obligee of such Indebtedness or other obligation of the payment thereof or to protect such obligee against loss in respect thereof (in whole or in part); provided, however, that the term “Guarantee” shall not include endorsements for collection or deposit in the ordinary course of business. The term “Guarantee” used as a verb has a corresponding meaning.

     “Holder,” “Holder of Debt Securities” or other similar terms means, with respect to a Registered Security, the Registered Holder and, with respect to a Bearer Security or a Coupon, the Bearer Holder.

     “Incur” means issue, assume, Guarantee, incur or otherwise become liable for; provided, however, that any Indebtedness or Capital Stock of a Person existing at the time such Person becomes a Subsidiary (whether by merger, consolidation, acquisition or otherwise) shall be deemed to be incurred by such Subsidiary at the time it becomes a Subsidiary. The terms “Incurred,” “Incurrence” and “Incurring” shall each have a correlative meaning.

     “Indebtedness” means, with respect to any Person, at any date, any obligation created or assumed by such Person for the repayment of borrowed money and any guarantee thereof.

     “Indenture” means this instrument as originally executed, or, if amended or supplemented as herein provided, as so amended or supplemented and shall include the form and terms of particular series of Debt Securities as contemplated hereunder, whether or not a supplemental indenture is entered into with respect thereto.

     “interest” includes, when used with respect to a Bearer Security, any additional interest payable on such Bearer Security pursuant to Section 3.02 or 4.06.

     “legal defeasance option” has the meaning set forth in Section 11.02(b).

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     “Lien” means any mortgage, pledge, security interest, encumbrance, lien, charge or adverse claim affecting title or resulting in an encumbrance against real or personal property or a security interest of any kind (including, without limitation, any conditional sale or other title retention agreement or lease in the nature thereof or any filing or agreement to file a financing statement as debtor under the Uniform Commercial Code or any similar statute other than to reflect ownership by a third party of property leased to the Company or any of its Subsidiaries under a lease that is not in the nature of a conditional sale or title retention agreement).

     “mandatory sinking fund payment” has the meaning set forth in Section 3.05.

     “Officer” means, with respect to the Company, the Chairman of the Board, the Vice Chairman of the Board, the Chief Executive Officer, the President, the Chief Operating Officer, the Chief Financial Officer, the Secretary or any Vice President.

     “Officers’ Certificate” means a certificate signed on behalf of the Company by any two of its Officers, one of whom must be the Company’s principal executive officer, principal financial officer or principal accounting officer, that meets the requirements of Section 13.05 hereof.

     “Opinion of Counsel” means an opinion in writing signed by legal counsel for the Company (which counsel may be an employee of the Company or outside counsel for the Company). Each such opinion shall include the statements provided for in Section 13.05, if applicable.

     “optional sinking fund payment” has the meaning set forth in Section 3.05.

     “Original Issue Discount Debt Security” means any Debt Security which provides for an amount less than the principal amount thereof to be due and payable upon a declaration of acceleration of the maturity thereof pursuant to Section 6.01.

     “Outstanding,” when used with respect to any series of Debt Securities, means, as of the date of determination, all Debt Securities of that series theretofore authenticated and delivered under this Indenture, except:

     (a) Debt Securities of that series theretofore canceled by the Trustee or delivered to the Trustee for cancellation;

     (b) Debt Securities of that series for whose payment or redemption money in the necessary amount has been theretofore deposited with the Trustee or any paying agent (other than the Company) in trust or set aside and segregated in trust by the Company (if the Company shall act as its own paying agent) for the Holders of such Debt Securities; provided, that, if such Debt Securities are to be redeemed, notice of such redemption has been duly given pursuant to this Indenture or provision therefor satisfactory to the Trustee has been made; and

     (c) Debt Securities of that series which have been paid pursuant to Section 2.09 or in exchange for or in lieu of which other Debt Securities have been authenticated and delivered pursuant to this Indenture, other than any such Debt Securities in respect of which there shall have been presented to the Trustee proof satisfactory to it that such Debt Securities are held by a protected purchaser in whose hands such Debt Securities are valid obligations of the Company;

provided, however, that in determining whether the Holders of the requisite principal amount of the Outstanding Debt Securities of any series have given any request, demand, authorization, direction, notice, consent or waiver hereunder, Debt Securities owned by the Company or any other obligor upon the Debt Securities or any Affiliate of the Company or of such other obligor shall be disregarded and deemed not to be Outstanding, except that, in determining whether the Trustee shall be protected in relying upon any such request, demand, authorization, direction, notice, consent or waiver, only Debt Securities which a responsible officer of the Trustee actually knows to be so owned shall be so disregarded. Debt Securities so owned which have been pledged in good faith may be regarded as Outstanding if the pledgee establishes to the satisfaction of the Trustee the pledgee’s right so to act with

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respect to such Debt Securities and that the pledgee is not the Company or any other obligor upon the Debt Securities or an Affiliate of the Company or of such other obligor. In determining whether the Holders of the requisite principal amount of Outstanding Debt Securities have given any request, demand, authorization, direction, notice, consent or waiver hereunder, the principal amount of an Original Issue Discount Debt Security that shall be deemed to be Outstanding for such purposes shall be the amount of the principal thereof that would be due and payable as of the date of such determination upon a declaration of acceleration of the maturity thereof pursuant to Section 6.01. In determining whether the Holders of the requisite principal amount of the Outstanding Debt Securities of any series have given any request, demand, authorization, direction, notice, consent or waiver hereunder, the principal amount of a Debt Security denominated in one or more Foreign Currencies or currency units that shall be deemed to be Outstanding for such purposes shall be the Dollar Equivalent, determined in the manner provided as contemplated by Section 2.03 on the date of original issuance of such Debt Security, of the principal amount (or, in the case of any Original Issue Discount Security, the Dollar Equivalent on the date of original issuance of such Security of the amount determined as provided in the preceding sentence above) of such Debt Security.

     “Person” means any individual, corporation, partnership, joint venture, limited liability company, incorporated or unincorporated association, joint-stock company, trust, unincorporated organization or government or other agency or political subdivision thereof or any other entity of any kind.

     “Place of Payment” means, when used with respect to the Debt Securities of any series, the place or places where the principal of, and premium, if any, and interest on, the Debt Securities of that series are payable as specified pursuant to Section 2.03.

     “Preferred Stock,” as applied to the Capital Stock of any Person, means Capital Stock of any class or classes (however designated) that is preferred as to the payment of dividends or distributions, or as to the distribution of assets upon any voluntary or involuntary liquidation or dissolution of such Person, over shares of Capital Stock of any other class of such Person.

     “Refinance” means, in respect of any Indebtedness, to refinance, extend, renew, refund, repay, prepay, redeem, defease or retire, or to issue other Indebtedness in exchange or replacement for, such indebtedness. “Refinanced” and “Refinancing” shall have correlative meanings.

     “Registered Holder” means the Person in whose name a Registered Security is registered in the Debt Security Register.

     “Registered Security” means any Debt Security registered as to principal and interest in the Debt Security Register (as defined in Section 2.07(a)).

     “Registrar” has the meaning set forth in Section 2.07(a).

     “Representative” means the trustee, agent or representative (if any) for an issue of Senior Indebtedness.

     “responsible officer,” when used with respect to the Trustee, means any Account Manager or any officer within the corporate trust trustee administration group of the Trustee, including any Vice President, any Assistant Vice President, any Treasurer, any Assistant Treasurer, any trust officer or any other officer of the Trustee performing functions similar to those performed by the persons who at the time shall be such officers, and any other officer of the Trustee to whom corporate trust matters are referred because of his knowledge of and familiarity with the particular subject.

     “SEC” means the United States Securities and Exchange Commission.

     “Secured Indebtedness” means any Indebtedness of the Company secured by a Lien.

     “Securities Act” means the Securities Act of 1933 and any successor statute.

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     “Senior Indebtedness” means, as to any series of Debt Securities subordinated pursuant to the provisions of Article XII, the Indebtedness of the Company identified as Senior Indebtedness in the resolution of the Board of Directors and accompanying Officers’ Certificate or supplemental indenture setting forth the terms, including as to subordination, of such series.

     “Significant Subsidiary” means a Subsidiary of any Person that would be a “significant subsidiary” as defined in Rule 405 under the Securities Act as in effect on the date of this Indenture.

     “Stated Maturity” means, with respect to any security, the date specified in such security as the fixed date on which the payment of principal of such security is due and payable, including pursuant to any mandatory redemption provision (but excluding any provision providing for the repurchase of such security at the option of the holder thereof upon the happening of any contingency beyond the control of the issuer unless such contingency has occurred).

     “Subsidiary” of any Person means (a) any Person of which more than 50% of the total voting power of shares of Capital Stock entitled (without regard to the occurrence of any contingency) to vote in the election of directors, managers or trustees thereof is at the time owned or controlled, directly or indirectly, by that Person or one or more of the Subsidiaries of that Person or a combination thereof, and (b) any partnership, joint venture or other Person in which that Person or one or more of the Subsidiaries of that Person or a combination thereof has the power to control by contract or otherwise the board of directors or equivalent governing body or otherwise controls such entity; provided, however, that notwithstanding the foregoing, with respect to the Company and its Subsidiaries, the definition of Subsidiary shall not include (i) Pioneer Southwest Energy Partners L.P. or any Subsidiary of Pioneer Southwest Energy Partners L.P., (ii) EFS Midstream LLC or any Subsidiary of EFS Midstream LLC, or (iii) any Person (other than a guarantor of the series of Debt Securities) that has securities that are listed for trading on a national securities exchange or that is subject to the reporting requirements of Section 13(a) or 15(d) of the Exchange Act.

     “Successor Company” has the meaning set forth in Section 10.01.

     “Trustee” initially means Wells Fargo Bank, National Association, and any other Person or Persons appointed as such from time to time pursuant to Section 7.08, and, subject to the provisions of Article VII, includes its or their successors and assigns. If at any time there is more than one such Person, “Trustee” as used with respect to the Debt Securities of any series shall mean the Trustee with respect to the Debt Securities of that series.

     “Trust Indenture Act” (except as herein otherwise expressly provided) means the Trust Indenture Act of 1939 as in force at the date of this Indenture as originally executed and, to the extent required by law, as amended.

     “United States” means the United States of America (including the states and the District of Columbia), its territories, its possessions and other areas subject to its jurisdiction.

     “United States Alien” means any Person who, for United States federal income tax purposes, is a foreign corporation, a nonresident alien individual, a nonresident alien fiduciary of a foreign estate or trust, or a foreign partnership one or more members of which is, for United States federal income tax purposes, a foreign corporation, a nonresident alien individual or a nonresident alien fiduciary of a foreign estate or trust.

     “U.S. Government Obligations” means direct obligations (or certificates representing an ownership interest in such obligations) of the United States of America (including any agency or instrumentality thereof) for the payment of which the full faith and credit of the United States of America is pledged.

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     “Yield to Maturity” means the yield to maturity, calculated at the time of issuance of a series of Debt Securities, or, if applicable, at the most recent redetermination of interest on such series and calculated in accordance with accepted financial practice.

     Section 1.02 Incorporation by Reference of Trust Indenture Act. This Indenture is subject to the mandatory provisions of the Trust Indenture Act which are incorporated by reference in and made a part of this Indenture. The following Trust Indenture Act terms have the following meanings:

     “indenture securities” means the Debt Securities.

     “indenture security holder” means a Holder.

     “indenture to be qualified” means this Indenture.

     “indenture trustee” or “institutional trustee” means the Trustee.

     “obligor” on the indenture securities means the Company and any other obligor on the Debt Securities.

     All other Trust Indenture Act terms used in this Indenture that are defined by the Trust Indenture Act, reference to another statute or defined by rules of the SEC have the meanings assigned to them by such definitions.

     Section 1.03 Rules of Construction. Unless the context otherwise requires:

     (a) a term has the meaning assigned to it;

     (b) an accounting term not otherwise defined has the meaning assigned to it in accordance with GAAP;

     (c) “or” is not exclusive;

     (d) “including” means including without limitation;

     (e) words in the singular include the plural and words in the plural include the singular;

     (f) if the applicable series of Debt Securities are subordinated pursuant to Article XII, unsecured Indebtedness shall not be deemed to be subordinate or junior to Secured Indebtedness merely by virtue of its nature as unsecured Indebtedness;

     (g) the principal amount of any noninterest bearing or other discount security at any date shall be the principal amount thereof that would be shown on a balance sheet of the issuer dated such date prepared in accordance with GAAP; and

     (h) the principal amount of any Preferred Stock shall be the greater of (i) the maximum liquidation value of such Preferred Stock or (ii) the maximum mandatory redemption or mandatory repurchase price with respect to such Preferred Stock.

ARTICLE II
DEBT SECURITIES

     Section 2.01 Forms Generally. The Debt Securities and Coupons, if any, of each series shall be in substantially the form established without the approval of any Holder by or pursuant to a resolution of the Board of Directors or in one or more indentures supplemental hereto, in each case with such appropriate insertions, omissions, substitutions and other variations as are required or permitted by this Indenture, and may have such letters, numbers or other marks of identification and such legends or endorsements placed thereon as the Company may deem appropriate (and, if not contained in a supplemental indenture entered into in accordance with Article IX, as are not prohibited by the provisions of this Indenture) or as may be required or appropriate to comply with any law or with any rules made pursuant thereto or with any rules of any securities exchange on which such series of Debt Securities may

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be listed, or to conform to general usage, or as may, consistently herewith, be determined by the officers executing such Debt Securities and Coupons, as evidenced by their execution of the Debt Securities and Coupons.

     The definitive Debt Securities of each series and Coupons, if any, shall be printed, lithographed or engraved on steel engraved borders or may be produced in any other manner, all as determined by the officers executing such Debt Securities and Coupons, as evidenced by their execution of such Debt Securities and Coupons.

     Each Bearer Security and each Coupon shall bear a legend substantially to the following effect: “Any United States Person who holds this obligation will be subject to limitations under the United States federal income tax laws, including the limitations provided in Sections 165(j) and 1287(a) of the Internal Revenue Code of 1986. as amended.”

     Section 2.02 Form of Trustee’s Certificate of Authentication. The Trustee’s Certificate of Authentication on all Debt Securities authenticated by the Trustee shall be in substantially the following form:

     TRUSTEE’S CERTIFICATE OF AUTHENTICATION

     This is one of the Debt Securities of the series designated therein referred to in the within-mentioned Indenture.

Dated:
WELLS FARGO BANK, NATIONAL ASSOCIATION,
As Trustee
By:
	Authorized Signature

     Section 2.03 Principal Amount; Issuable in Series. The aggregate principal amount of Debt Securities which may be issued, executed, authenticated, delivered and outstanding under this Indenture is unlimited.

     The Debt Securities may be issued in one or more series. There shall be established, without the approval of any Holders, in or pursuant to a resolution of the Board of Directors and set forth in an Officers’ Certificate, or established in one or more indentures supplemental hereto, prior to the issuance of Debt Securities of any series any or all of the following:

     (a) the title of the Debt Securities of the series (which shall distinguish the Debt Securities of the series from all other Debt Securities);

     (b) any limit upon the aggregate principal amount of the Debt Securities of the series which may be authenticated and delivered under this Indenture (except for Debt Securities authenticated and delivered upon registration of transfer of, or in exchange for, or in lieu of, other Debt Securities of the series pursuant to this Article II);

     (c) the date or dates on which the principal of and premium on, if any, of the Debt Securities of the series are payable;

     (d) the rate or rates (which may be fixed or variable) at which the Debt Securities of the series shall bear interest, if any, or the method of determining such rate or rates, the date or dates from which such interest shall accrue, the interest payment dates on which such interest shall be payable, or the

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method by which such date will be determined, in the case of Registered Securities, the record dates for the determination of Holders thereof to whom such interest is payable; and the basis upon which interest will be calculated if other than that of a 360-day year of 12 30-day months;

     (e) the place or places, if any, in addition to or instead of the corporate trust office of the Trustee (in the case of Registered Securities) or the principal London office of the Trustee (in the case of Bearer Securities), where the principal of, and premium, if any, and interest on, Debt Securities of the series shall be payable;

     (f) the price or prices at which, the period or periods within which and the terms and conditions upon which Debt Securities of the series may be redeemed, in whole or in part, at the option of the Company or otherwise;

     (g) whether Debt Securities of the series are to be issued as Registered Securities or Bearer Securities or both, and, if Bearer Securities are to be issued, whether Coupons will be attached thereto, whether Bearer Securities of the series may be exchanged for Registered Securities of the series and the circumstances under which and the places at which any such exchanges, if permitted, may be made;

     (h) if any Debt Securities of the series are to be issued as Bearer Securities or as one or more Global Securities representing individual Bearer Securities of the series, (i) whether the provisions of Sections 3.02 and 4.06 or other provisions for payment of additional interest or tax redemptions shall apply and, if other provisions shall apply, such other provisions; (ii) whether interest in respect of any portion of a temporary Bearer Security of the series (delivered pursuant to Section 2.08) payable in respect of any interest payment date prior to the exchange of such temporary Bearer Security for definitive Bearer Securities of the series shall be paid to any clearing organization with respect to the portion of such temporary Bearer Security held for its account and, in such event, the terms and conditions (including any certification requirements) upon which any such interest payment received by a clearing organization will be credited to the Persons entitled to interest payable on such interest payment date; and (iii) the terms upon which a temporary Bearer Security may be exchanged for one or more definitive Bearer Securities of the series;

     (i) the obligation, if any, of the Company to redeem, purchase or repay Debt Securities of the series pursuant to any sinking fund or analogous provisions or at the option of a Holder thereof, and the price or prices at which and the period or periods within which and the terms and conditions upon which Debt Securities of the series shall be redeemed, purchased or repaid, in whole or in part, pursuant to such obligations;

     (j) the terms, if any, upon which the Debt Securities of the series may be convertible into or exchanged for Common Stock, Preferred Stock (which may be represented by depositary shares), other Debt Securities or warrants for Common Stock, Preferred Stock or Indebtedness or other securities of any kind of the Company or any other obligor and the terms and conditions upon which such conversion or exchange shall be effected, including the initial conversion or exchange price or rate, the conversion or exchange period and any other provision in addition to or in lieu of those described herein;

     (k) if other than denominations of $1,000 and any integral multiple thereof, the denominations in which Debt Securities of the series shall be issuable;

     (l) if the amount of principal of or any premium or interest on Debt Securities of the series may be determined with reference to an index or pursuant to a formula, the manner in which such amounts will be determined;

     (m) if the principal amount payable at the Stated Maturity of Debt Securities of the series will not be determinable as of any one or more dates prior to such Stated Maturity, the amount which will be deemed to be such principal amount as of any such date for any purpose, including the principal amount thereof which will be due and payable upon any maturity other than the Stated Maturity or which will be

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deemed to be Outstanding as of any such date (or, in any such case, the manner in which such deemed principal amount is to be determined); and the manner of determining the equivalent thereof in the currency of the United States for purposes of the definition of Dollar Equivalent;

     (n) any changes or additions to Article XI, including the addition of additional covenants that may be subject to the covenant defeasance option pursuant to Section 11.02(b);

     (o) if other than such coin or Currency of the United States as at the time of payment is legal tender for payment of public and private debts, the coin or Currency or Currencies or units of two or more Currencies in which payment of the principal of, and premium, if any, and interest on, Debt Securities of the series shall be payable;

     (p) if other than the principal amount thereof, the portion of the principal amount of Debt Securities of the series which shall be payable upon declaration of acceleration of the maturity thereof pursuant to Section 6.01 or provable in bankruptcy pursuant to Section 6.02;

     (q) the terms, if any, of the transfer, mortgage, pledge or assignment as security for the Debt Securities of the series of any properties, assets, moneys, proceeds, securities or other collateral, including whether certain provisions of the Trust Indenture Act are applicable and any corresponding changes to provisions of this Indenture as currently in effect;

     (r) any addition to or change in the Events of Default with respect to the Debt Securities of the series and any change in the right of the Trustee or the Holders to declare the principal of, and premium and interest on, such Debt Securities due and payable;

     (s) if the Debt Securities of the series shall be issued in whole or in part in the form of a Global Security or Securities, the terms and conditions, if any, upon which such Global Security or Securities may be exchanged in whole or in part for other individual Debt Securities in definitive registered form; and the Depositary for such Global Security or Securities and the form of any legend or legends to be borne by any such Global Security or Securities in addition to or in lieu of the legend referred to in Section 2.15;

     (t) any trustees, authenticating or paying agents, transfer agents or registrars;

     (u) the applicability or inapplicability of, and any addition to or change in the covenants and definitions currently set forth in this Indenture or in the terms currently set forth in Article X, including conditioning any merger, conveyance, transfer or lease permitted by Article X upon the satisfaction of an Indebtedness coverage standard by the Company and Successor Company (as defined in Article X);

     (v) the terms, if any, of any Guarantee of the payment of principal of, and premium, if any, and interest on, Debt Securities of the series and any corresponding changes to the provisions of this Indenture as currently in effect;

     (w) the subordination, if any, of the Debt Securities of the series pursuant to Article XII and any changes or additions to Article XII;

     (x) with regard to Debt Securities of the series that do not bear interest, the dates for certain required reports to the Trustee; and

     (y) any other terms of the Debt Securities of the series (which terms shall not be prohibited by the provisions of this Indenture).

All Debt Securities of any one series and the Coupons, if any, appertaining thereto shall be substantially identical except as to denomination and except as may otherwise be provided in or pursuant to such resolution of the Board of Directors and as set forth in such Officers’ Certificate or in any such indenture supplemental hereto.

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     Section 2.04 Execution of Debt Securities. The Debt Securities and the Coupons, if any, shall be signed on behalf of the Company by its Chairman of the Board, its Vice Chairman of the Board, its Chief Executive Officer, its President, its Chief Operating Officer, its Chief Financial Officer, its Secretary or any Vice President. Such signatures upon the Debt Securities and Coupons may be the manual or facsimile signatures of the present or any future such authorized officers and may be imprinted or otherwise reproduced on the Debt Securities and Coupons. The seal of the Company, if any, may be in the form of a facsimile thereof and may be impressed, affixed, imprinted or otherwise reproduced on the Debt Securities and Coupons.

     Only such Debt Securities and Coupons as shall bear thereon a certificate of authentication substantially in the form hereinbefore recited, signed manually by the Trustee, shall be entitled to the benefits of this Indenture or be valid or obligatory for any purpose. Such certificate by the Trustee upon any Debt Security or Coupon executed by the Company shall be conclusive evidence that the Debt Security or Coupon so authenticated has been duly authenticated and delivered hereunder.

     In case any officer of the Company who shall have signed any of the Debt Securities or Coupons shall cease to be such officer before the Debt Securities or Coupons so signed shall have been authenticated and delivered by the Trustee, or disposed of by the Company, such Debt Securities or Coupons nevertheless may be authenticated and delivered or disposed of as though the Person who signed such Debt Securities or Coupons had not ceased to be such officer of the Company; and any Debt Security or Coupon may be signed on behalf of the Company by such Persons as, at the actual date of the execution of such Debt Security or Coupon, shall be the proper officers of the Company, although at the date of such Debt Security or Coupon or of the execution of this Indenture any such Person was not such officer.

     Section 2.05 Authentication and Delivery of Debt Securities. At any time and from time to time after the execution and delivery of this Indenture, the Company may deliver Debt Securities, with appropriate Coupons, if any, of any series executed by the Company to the Trustee for authentication, and the Trustee shall thereupon authenticate and deliver said Debt Securities and Coupons to or upon a Company Order. In authenticating such Debt Securities and Coupons, and accepting the additional responsibilities under this Indenture in relation to such Debt Securities and Coupons, the Trustee shall be entitled to receive, and (subject to Section 7.01) shall be fully protected in relying upon:

     (a) a copy of any resolution or resolutions of the Board of Directors, certified by the Secretary or Assistant Secretary of the Company, authorizing the terms of issuance of any series of Debt Securities and Coupons;

     (b) an executed supplemental indenture, if any;

     (c) an Officers’ Certificate; and

     (d) an Opinion of Counsel prepared in accordance with Section 13.05 which shall also state:

     (i) that the form of such Debt Securities and Coupons has been established by or pursuant to a resolution of the Board of Directors or by a supplemental indenture as permitted by Section 2.01 in conformity with the provisions of this Indenture;

     (ii) that the terms of such Debt Securities and Coupons have been established by or pursuant to a resolution of the Board of Directors or by a supplemental indenture as permitted by Section 2.03 in conformity with the provisions of this Indenture;

     (iii) that such Debt Securities and Coupons, when authenticated and delivered by the Trustee and issued by the Company in the manner and subject to any conditions specified in such Opinion of Counsel, will constitute valid and legally binding obligations of the Company, enforceable in accordance with their terms except as (A) the enforceability thereof may be limited by bankruptcy, insolvency or similar laws affecting the enforcement of creditors’ rights generally

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and (B) rights of acceleration and the availability of equitable remedies may be limited by equitable principles of general applicability;

     (iv) that the Company has the corporate power to issue such Debt Securities and Coupons and has duly taken all necessary corporate action with respect to such issuance;

     (v) that the issuance of such Debt Securities and Coupons will not contravene the charter or by-laws of the Company or result in any material violation of any of the terms or provisions of any law or regulation or of any material indenture, mortgage or other agreement known to such counsel by which the Company is bound;

     (vi) that authentication and delivery of such Debt Securities and Coupons and the execution and delivery of any supplemental indenture will not violate the terms of this Indenture; and

     (vii) such other matters as the Trustee may reasonably request.

     Such Opinion of Counsel need express no opinion as to whether a court in the United States would render a money judgment in a currency other than that of the United States.

     The Trustee shall have the right to decline to authenticate and deliver any Debt Securities or Coupons under this Section 2.05 if the Trustee, being advised by counsel, determines that such action may not lawfully be taken or if the Trustee in good faith by its board of directors or trustees, executive committee or a trust committee of directors, trustees or vice presidents (or any combination thereof) shall determine that such action would expose the Trustee to personal liability to existing Holders.

     The Trustee may appoint an authenticating agent reasonably acceptable to the Company to authenticate Debt Securities and Coupons, if any, of any series. Unless limited by the terms of such appointment, an authenticating agent may authenticate Debt Securities whenever the Trustee may do so. Each reference in this Indenture to authentication by the Trustee includes authentication by such agent. An authenticating agent has the same rights as any Registrar, paying agent or agent for service of notices and demands.

     Unless otherwise provided in the form of Debt Security for any series, each Debt Security shall be dated the date of its authentication.

     Section 2.06 Denomination of Debt Securities. Unless otherwise provided in the form of Debt Security for any series, the Debt Securities of each series shall be issuable only as Registered Securities in such denominations as shall be specified or contemplated by Section 2.03. In the absence of any such specification with respect to the Debt Securities of any series, the Debt Securities of such series shall be issuable in denominations of $1,000 and any integral multiple thereof.

     Section 2.07 Registration of Transfer and Exchange. (a) The Company shall keep or cause to be kept a register for each series of Registered Securities issued hereunder (hereinafter collectively referred to as the “Debt Security Register”), in which, subject to such reasonable regulations as it may prescribe, the Company shall provide for the registration of Registered Securities and the registration of transfer and exchange of Registered Securities as in this Article II provided. At all reasonable times the Debt Security Register shall be open for inspection by the Trustee. Subject to Section 2.15, upon due presentment for registration of transfer of any Registered Security at any office or agency to be maintained by the Company in accordance with the provisions of Section 4.02, the Company shall execute and the Trustee shall authenticate and deliver in the name of the transferee or transferees a new Registered Security or Registered Securities of authorized denominations for a like aggregate principal amount. In no event may Registered Securities, including Registered Securities received in exchange for Bearer Securities, be issued as, or exchanged for, Bearer Securities.

     Unless and until otherwise determined by the Company by resolution of the Board of Directors, the register of the Company for the purpose of registration, exchange or registration of transfer of the

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Registered Securities shall be kept at the corporate trust office of the Trustee referred to in Section 13.03 and, for this purpose, the Trustee referred to in Section 13.03 shall be designated “Registrar.”

     Registered Securities of any series (other than a Global Security, except as set forth below) may be exchanged for a like aggregate principal amount of Registered Securities of the same series of other authorized denominations. Subject to Section 2.15, Registered Securities to be exchanged shall be surrendered at the office or agency to be maintained by the Company as provided in Section 4.02, and the Company shall execute and the Trustee shall authenticate and deliver in exchange therefor the Registered Security or Registered Securities which the Holder making the exchange shall be entitled to receive.

     At the option of the Holder of Bearer Securities of any series, except as otherwise specified as contemplated by Section 2.03(h) or 2.03(s) with respect to a Global Security representing Bearer Securities, Bearer Securities of such series may be exchanged for Registered Securities (if the Debt Securities of such series are issuable as Registered Securities) or Bearer Securities of the same series, of any authorized denomination or denominations, of like tenor and aggregate principal amount, upon surrender of the Bearer Securities to be exchanged at the office or agency of the Company maintained for such purpose, with all unmatured Coupons and all matured Coupons in Default thereto appertaining; provided, however, that delivery of a Bearer Security shall occur only outside the United States. If such Holder is unable to produce any such unmatured Coupon or Coupons or matured Coupon or Coupons in Default, such exchange may be effected if such Holder’s Bearer Securities are accompanied by payment in funds acceptable to the Company and the Trustee in an amount equal to the face amount of such missing Coupon or Coupons, or the surrender of such missing Coupon or Coupons may be waived by the Company and the Trustee if there be furnished to them such security or indemnity as they may require to save each of them and any paying agent harmless. If thereafter such Holder shall surrender to any paying agent any such missing Coupon in respect of which such a payment shall have been made, such Holder shall be entitled to receive the amount of such payment; provided, however, that, except as otherwise provided in Section 2.12, interest represented by Coupons shall be payable only upon presentation and surrender of those Coupons at an office or agency located outside the United States.

     Whenever any Debt Securities are so surrendered for exchange, the Company shall execute, and the Trustee shall authenticate and deliver, the Debt Securities that the Holder making the exchange is entitled to receive.

     Notwithstanding the foregoing, the exchange of Bearer Securities for Registered Securities will be subject to the provisions of United States income tax laws and regulations applicable to Debt Securities in effect at the time of such exchange.

     (b) All Registered Securities presented or surrendered for registration of transfer, exchange or payment shall (if so required by the Company, the Trustee or the Registrar) be duly endorsed or be accompanied by a written instrument or instruments of transfer, in form satisfactory to the Company, the Trustee and the Registrar, duly executed by the Registered Holder or his attorney duly authorized in writing.

     All Debt Securities issued in exchange for or upon transfer of Debt Securities shall be the valid obligations of the Company, evidencing the same debt, and entitled to the same benefits under this Indenture as the Debt Securities surrendered for such exchange or transfer.

     No service charge shall be made for any exchange or registration of transfer of Debt Securities (except as provided by Section 2.09), but the Company may require payment of a sum sufficient to cover any tax, fee, assessment or other governmental charge that may be imposed in relation thereto, other than those expressly provided in this Indenture to be made at the Company’s own expense or without expense or without charge to the Holders.

     The Company shall not be required (i) to issue, register the transfer of or exchange any Debt Securities for a period of 15 days next preceding any mailing of notice of redemption of Debt Securities

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of such series or (ii) to register the transfer of or exchange any Debt Securities selected, called or being called for redemption; provided, however, that, if specified pursuant to Section 2.03, any Bearer Securities of any series that are exchangeable for Registered Securities and that are called for redemption pursuant to Section 3.02 may, to the extent permitted by applicable law, be exchanged for one or more Registered Securities of such series during the period preceding the redemption date therefor.

     Prior to the due presentation for registration of transfer of any Debt Security, the Company, the Trustee, any paying agent or any Registrar may deem and treat the Person in whose name a Debt Security is registered as the absolute owner of such Debt Security for the purpose of receiving payment of or on account of the principal of, and premium, if any, and (subject to Section 2.12) interest on, such Debt Security and for all other purposes whatsoever, whether or not such Debt Security is overdue, and none of the Company, the Trustee, any paying agent or any Registrar shall be affected by notice to the contrary.

     None of the Company, the Trustee, any agent of the Trustee, any paying agent or any Registrar will have any responsibility or liability for any aspect of the records relating to, or payments made on account of, beneficial ownership interests of a Global Security or for maintaining, supervising or reviewing any records relating to such beneficial ownership interests.

     Section 2.08 Temporary Debt Securities. Pending the preparation of definitive Debt Securities of any series, the Company may execute and the Trustee shall authenticate and deliver temporary Debt Securities (printed, lithographed, photocopied, typewritten or otherwise produced) of any authorized denomination, and substantially in the form of the definitive Debt Securities in lieu of which they are issued, in registered form or, if authorized, in bearer form with one or more Coupons or without Coupons, and with such omissions, insertions and variations as may be appropriate for temporary Debt Securities and Coupons, all as may be determined by the Company with the concurrence of the Trustee. Temporary Debt Securities and Coupons may contain such reference to any provisions of this Indenture as may be appropriate. Every temporary Debt Security shall be executed by the Company and be authenticated by the Trustee upon the same conditions and in substantially the same manner, and with like effect, as the definitive Debt Securities.

     If temporary Debt Securities of any series are issued, the Company will cause definitive Debt Securities of such series to be prepared without unreasonable delay. Except as otherwise specified as contemplated by Section 2.03(h)(iii) with respect to a series of Debt Securities issuable as Bearer Securities or as one or more Global Securities representing individual Bearer Securities of the series, (a) after the preparation of definitive Debt Securities of such series, the temporary Debt Securities of such series shall be exchangeable for definitive Debt Securities of such series upon surrender of the temporary Debt Securities of such series at the office or agency of the Company at a Place of Payment for such series, without charge to the Holder thereof, except as provided in Section 2.07 in connection with a transfer and except that a Person receiving definitive Bearer Securities shall bear the cost of insurance, postage, transportation and the like unless otherwise specified pursuant to Section 2.03, and (b) upon surrender for cancellation of any one or more temporary Debt Securities of any series (accompanied by any unmatured Coupons appertaining thereto), the Company shall execute and the Trustee shall authenticate and deliver in exchange therefor a like principal amount of definitive Debt Securities of the same series of authorized denominations and of like tenor; provided, however, that no definitive Bearer Security shall be delivered in exchange for a temporary Registered Security; and provided, further, however, that delivery of a Global Security representing individual Bearer Securities or a Bearer Security shall occur only outside the United States. Until so exchanged, temporary Debt Securities of any series shall in all respects be entitled to the same benefits under this Indenture as definitive Debt Securities of such series, except as otherwise specified as contemplated by Section 2.03(h)(ii) with respect to the payment of interest on Global Securities in temporary form.

     Unless otherwise specified pursuant to Section 2.03, the Company will execute and deliver each definitive Global Security representing individual Bearer Securities and each Bearer Security to the

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Trustee at its principal office in London or such other place outside the United States specified pursuant to Section 2.03.

     Upon any exchange of a portion of a temporary Global Security for a definitive Global Security or for the individual Debt Securities represented thereby pursuant to Section 2.07 or this Section 2.08, the temporary Global Security shall be endorsed by the Trustee to reflect the reduction of the principal amount evidenced thereby, whereupon the principal amount of such temporary Global Security shall be reduced for all purposes by the amount to be exchanged and endorsed.

     Section 2.09 Mutilated, Destroyed, Lost or Stolen Debt Securities. If (a) any mutilated Debt Security or any mutilated Coupon with the Coupon Security to which it appertains (and all unmatured Coupons attached thereto) is surrendered to the Trustee at its corporate trust office (in the case of Registered Securities) or at its principal London office (in the case of Bearer Securities) or (b) the Company and the Trustee receive evidence to their satisfaction of the destruction, loss or theft of any Debt Security or any Coupon, and there is delivered to the Company and the Trustee such security or indemnity as may be required by them to save each of them and any paying agent harmless, and neither the Company nor the Trustee receives notice that such Debt Security or Coupon has been acquired by a protected purchaser, then the Company shall execute and, upon a Company Order, the Trustee shall authenticate and deliver, in exchange for or in lieu of any such mutilated, destroyed, lost or stolen Debt Security or in exchange for the Coupon Security to which such mutilated, destroyed, lost or stolen Coupon appertained, a new Debt Security of the same series of like tenor, form, terms and principal amount, bearing a number not contemporaneously Outstanding, and, in the case of a Coupon Security, with such Coupons attached thereto that neither gain nor loss in interest shall result from such exchange or substitution. Upon the issuance of any substituted Debt Security, the Company may require the payment of a sum sufficient to cover any tax, fee, assessment or other governmental charge that may be imposed in relation thereto and any other expenses connected therewith. In case any Debt Security or Coupon which has matured or is about to mature or which has been called for redemption shall become mutilated or be destroyed, lost or stolen, the Company may, instead of issuing a substituted Debt Security or Coupon, pay or authorize the payment of the same (without surrender thereof except in the case of a mutilated Debt Security or Coupon) if the applicant for such payment shall furnish the Company and the Trustee with such security or indemnity as either may require to save it harmless from all risk, however remote, and, in case of destruction, loss or theft, evidence to the satisfaction of the Company and the Trustee of the destruction, loss or theft of such Debt Security or Coupon and of the ownership thereof; provided, however, that payment of principal of, and premium, if any, and interest on, Bearer Securities or Coupons shall, except as otherwise provided in Section 2.12, be payable only at an office or agency located outside the United States.

     Every substituted Debt Security of any series, with its Coupons, if any, issued pursuant to the provisions of this Section 2.09 by virtue of the fact that any Debt Security or Coupon is destroyed, lost or stolen shall constitute an original additional contractual obligation of the Company, whether or not the destroyed, lost or stolen Debt Security or Coupon shall be found at any time, and shall be entitled to all the benefits of this Indenture equally and proportionately with any and all other Debt Securities of that series and Coupons, if any, duly issued hereunder. All Debt Securities and Coupons, if any, shall be held and owned upon the express condition that the foregoing provisions are exclusive with respect to the replacement or payment of mutilated, destroyed, lost or stolen Debt Securities or Coupons, and shall preclude any and all other rights or remedies, notwithstanding any law or statute existing or hereafter enacted to the contrary with respect to the replacement or payment of negotiable instruments or other securities without their surrender.

     Section 2.10 Cancellation of Surrendered Debt Securities. All Debt Securities surrendered for payment, redemption, registration of transfer or exchange and all Coupons surrendered for payment or exchange shall, if surrendered to the Company or any paying agent or a Registrar, be delivered to the Trustee for cancellation by it, or if surrendered to the Trustee, shall be canceled by it, and no Debt

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Securities or Coupons shall be issued in lieu thereof except as expressly permitted by any of the provisions of this Indenture. All canceled Debt Securities and Coupons held by the Trustee shall be destroyed in accordance with its standard procedures (subject to the record retention requirements of the Exchange Act) and certification of their destruction delivered to the Company, unless otherwise directed. On request of the Company, the Trustee shall deliver to the Company canceled Debt Securities and Coupons held by the Trustee. If the Company shall acquire any of the Debt Securities or Coupons, however, such acquisition shall not operate as a redemption or satisfaction of the indebtedness represented thereby unless and until the same are delivered or surrendered to the Trustee for cancellation. The Company may not issue new Debt Securities or Coupons to replace Debt Securities or Coupons it has redeemed, paid or delivered to the Trustee for cancellation.

     Section 2.11 Provisions of the Indenture and Debt Securities for the Sole Benefit of the Parties and the Holders. Nothing in this Indenture or in the Debt Securities or Coupons, expressed or implied, shall give or be construed to give to any Person, other than the parties hereto, the Holders or any Registrar or paying agent, any legal or equitable right, remedy or claim under or in respect of this Indenture, or under any covenant, condition or provision herein contained; all its covenants, conditions and provisions being for the sole benefit of the parties hereto, the Holders and any Registrar and paying agents.

     Section 2.12 Payment of Interest; Interest Rights Preserved. (a) Interest on any Registered Security that is payable and is punctually paid or duly provided for on any interest payment date shall be paid to the Person in whose name such Registered Security is registered at the close of business on the regular record date for such interest notwithstanding the cancellation of such Registered Security upon any transfer or exchange subsequent to the regular record date. In case a Coupon Security of any series is surrendered in exchange for a Registered Security of such series after the close of business (at an office or agency in a Place of Payment for such series) on any regular record date and before the opening of business (at such office or agency) on the next succeeding interest payment date, such Coupon Security shall be surrendered without the Coupon relating to such interest payment date and interest will not be payable on such interest payment date in respect of the Registered Security issued in exchange for such Coupon Security, but will be payable only to the Holder of such Coupon when due in accordance with the provisions of this Indenture. Payment of interest on Registered Securities shall be made at the corporate trust office of the Trustee specified in Section 13.03 (except as otherwise specified pursuant to Section 2.03), or at the option of the Company, by check mailed to the address of the Person entitled thereto as such address shall appear in the Debt Security Register or, if provided pursuant to Section 2.03 and in accordance with arrangements satisfactory to the Trustee, at the option of the Registered Holder by wire transfer to an account designated by the Registered Holder.

     (b) No interest shall be payable with respect to a Bearer Security or Coupon unless such certification requirements as are specified pursuant to Section 2.03(h)(iii) are satisfied with respect to such Bearer Security or Coupon. Interest on any Coupon Security that is payable and is punctually paid or duly provided for on any interest payment date shall be paid to the Holder of the Coupon that has matured on such interest payment date upon surrender of such Coupon on such interest payment date at the principal London office of the Trustee or at such other Place of Payment outside the United States specified pursuant to Section 2.03.

     Interest on any Bearer Security (other than a Coupon Security) that is payable and is punctually paid or duly provided for on any interest payment date shall be paid to the Holder of the Bearer Security upon presentation of such Bearer Security and notation thereon on such interest payment date at the principal London office of the Trustee or at such other Place of Payment outside the United States specified pursuant to Section 2.03.

     Unless otherwise specified pursuant to Section 2.03, at the direction of the Holder of any Bearer Security or Coupon payable in Dollars, and subject to applicable laws and regulations, payments in

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respect of such Bearer Security or Coupon will be made by check drawn on a bank in New York, New York, or, in accordance with arrangements satisfactory to the Trustee, by wire transfer to a Dollar account maintained by such Holder with a bank outside the United States. If such payment at the offices of all paying agents outside the United States becomes illegal or is effectively precluded because of the imposition of exchange controls or similar restrictions on the full payment or receipt of such amounts in Dollars, then, to the extent permitted by United States tax law, the Company will appoint an office or agent in the United States at which such payment may be made. Unless otherwise specified pursuant to Section 2.03, at the direction of the Holder of any Bearer Security or Coupon payable in a Foreign Currency, payment on such Bearer Security or Coupon will be made by a check drawn on a bank outside the United States or, in accordance with arrangements satisfactory to the Trustee, by wire transfer to an appropriate account maintained by such Holder outside the United States. Except as provided in this paragraph, no payment on any Bearer Security or Coupon will be made by mail to an address in the United States or by transfer to an account in the United States.

     (c) Subject to the foregoing provisions of this Section 2.12 and Section 2.17, each Debt Security of a particular series delivered under this Indenture upon registration of transfer of or in exchange for or in lieu of any other Debt Security of the same series shall carry the rights to interest accrued and unpaid, and to accrue, which were carried by such other Debt Security.

     Section 2.13 Securities Denominated in Foreign Currencies. (a) Except as otherwise specified pursuant to Section 2.03 for Bearer Securities of any series, payment of the principal of, and premium, if any, and interest on, Bearer Securities of such series denominated in any Currency will be made in such Currency.

     (b) Except as otherwise specified pursuant to Section 2.03 for Registered Securities of any series, payment of the principal of, and premium, if any, and interest on, Registered Securities of such series will be made in Dollars.

     (c) For the purposes of calculating the principal amount of Debt Securities of any series denominated in a Foreign Currency or in units of two or more Foreign Currencies (including European Currency Units) for any purpose under this Indenture, the principal amount of such Debt Securities at any time Outstanding shall be deemed to be the Dollar Equivalent of such principal amount as of the date of any such calculation.

In the event any Foreign Currency or currencies or units of two or more Currencies in which any payment with respect to any series of Debt Securities may be made ceases to be a freely convertible Currency on United States Currency markets, for any date thereafter on which payment of principal of, or premium, if any, or interest on, the Debt Securities of a series is due, the Company shall select the Currency of payment for use on such date, all as provided in the Debt Securities of such series. In such event, the Company shall, as provided in the Debt Securities of such series, notify the Trustee of the Currency which it has selected to constitute the funds necessary to meet the Company’s obligations on such payment date and of the amount of such Currency to be paid. Such amount shall be determined as provided in the Debt Securities of such series. The payment to the Trustee with respect to such payment date shall be made by the Company solely in the Currency so selected.

     Section 2.14 Wire Transfers. Notwithstanding any other provision to the contrary in this Indenture, the Company may make any payment of money required to be deposited with the Trustee on account of principal of, or premium, if any, or interest on, the Debt Securities (whether pursuant to optional or mandatory redemption payments, interest payments or otherwise) by wire transfer in immediately available funds to an account designated by the Trustee on or before the date such money is to be paid to the Holders of the Debt Securities in accordance with the terms hereof.

     Section 2.15 Securities Issuable in the Form of a Global Security. (a) If the Company shall establish pursuant to Sections 2.01 and 2.03 that the Debt Securities of a particular series are to be issued

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in whole or in part in the form of one or more Global Securities, then the Company shall execute and the Trustee or its agent shall, in accordance with Section 2.05, authenticate and deliver, such Global Security or Securities, which (i) shall represent, and shall be denominated in an amount equal to the aggregate principal amount of, the Outstanding Debt Securities of such series to be represented by such Global Security or Securities, or such portion thereof as the Company shall specify in an Officer’s Certificate, (ii) shall be registered in the name of the Depositary for such Global Security or Securities or its nominee, (iii) shall be delivered by the Trustee or its agent to the Depositary or pursuant to the Depositary’s instruction and (iv) shall bear a legend substantially to the following effect: ‘UNLESS THIS CERTIFICATE IS PRESENTED BY AN AUTHORIZED REPRESENTATIVE OF THE DEPOSITORY TRUST COMPANY, A NEW YORK CORPORATION (“DTC”), NEW YORK, NEW YORK, TO THE COMPANY OR ITS AGENT FOR REGISTRATION OF TRANSFER, EXCHANGE OR PAYMENT, AND ANY CERTIFICATE ISSUED IS REGISTERED IN THE NAME OF CEDE & CO. OR SUCH OTHER NAME AS IS REQUESTED BY AN AUTHORIZED REPRESENTATIVE OF DTC (AND ANY PAYMENT IS MADE TO CEDE & CO., OR TO SUCH OTHER ENTITY AS IS REQUESTED BY AN AUTHORIZED REPRESENTATIVE OF DTC) ANY TRANSFER, PLEDGE OR OTHER USE HEREOF FOR VALUE OR OTHERWISE BY OR TO ANY PERSON IS WRONGFUL INASMUCH AS THE REGISTERED OWNER HEREOF, CEDE & CO., HAS AN INTEREST HEREIN. TRANSFERS OF THIS GLOBAL SECURITY SHALL BE LIMITED TO TRANSFERS IN WHOLE, BUT NOT IN PART, TO NOMINEES OF DTC OR TO A SUCCESSOR THEREOF OR SUCH SUCCESSOR’S NOMINEE AND TRANSFERS OF PORTIONS OF THIS GLOBAL SECURITY SHALL BE LIMITED TO TRANSFERS MADE IN ACCORDANCE WITH THE RESTRICTIONS SET FORTH IN THE INDENTURE REFERRED TO HEREIN’, or such other legend as may then be required by the Depositary for such Global Security or Securities.

     (b) Notwithstanding any other provision of this Section 2.15 or of Section 2.07 to the contrary, and subject to the provisions of paragraph (c) below, unless the terms of a Global Security expressly permit such Global Security to be exchanged in whole or in part for definitive Debt Securities in registered form, a Global Security may be transferred, in whole but not in part and in the manner provided in Section 2.07, only by the Depositary to a nominee of the Depositary for such Global Security, or by a nominee of the Depositary to the Depositary or another nominee of the Depositary, or by the Depositary or a nominee of the Depositary to a successor Depositary for such Global Security selected or approved by the Company, or to a nominee of such successor Depositary.

(c) (i) If at any time the Depositary for a Global Security or Securities notifies the Company that it is unwilling or unable to continue as Depositary for such Global Security or Securities or if at any time the Depositary for the Debt Securities for such series shall no longer be eligible or in good standing under the Exchange Act or other applicable statute, rule or regulation, the Company shall appoint a successor Depositary with respect to such Global Security or Securities. If a successor Depositary for such Global Security or Securities is not appointed by the Company within 90 days after the Company receives such notice or becomes aware of such ineligibility, the Company shall execute, and the Trustee or its agent, upon receipt of a Company Order for the authentication and delivery of such individual Debt Securities of such series in exchange for such Global Security or Securities, will authenticate and deliver, individual Debt Securities of such series of like tenor and terms in definitive form in an aggregate principal amount equal to the principal amount of the Global Security or Securities in exchange for such Global Security or Securities.

     (ii) If an Event of Default occurs and the Depositary for a Global Security or Securities notifies the Trustee of its decision to require that the Debt Securities of any series or portion thereof issued or issuable in the form of one or more Global Securities shall no longer be represented by such Global Security or Securities, then the Company will execute, and the Trustee, upon receipt of a Company Order for the authentication and delivery of individual Debt

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Securities of such series in exchange in whole or in part for such Global Security or Securities, will authenticate and deliver individual Debt Securities of such series of like tenor and terms in definitive form in an aggregate principal amount equal to the principal amount of such series or portion thereof in exchange for such Global Security or Securities.

     (iii) The Company may at any time in its sole discretion determine that the Debt Securities of any series or portion thereof issued or issuable in the form of one or more Global Securities shall no longer be represented by such Global Security or Securities. In such event the Company will execute, and the Trustee, upon receipt of a Company Order for the authentication and delivery of individual Debt Securities of such series in exchange in whole or in part for such Global Security or Securities, will authenticate and deliver individual Debt Securities of such series of like tenor and terms in definitive form in an aggregate principal amount equal to the principal amount of such series or portion thereof in exchange for such Global Security or Securities.

     (iv) If specified by the Company pursuant to Sections 2.01 and 2.03 with respect to Debt Securities issued or issuable in the form of a Global Security, the Depositary for such Global Security may surrender such Global Security in exchange in whole or in part for individual Debt Securities of such series of like tenor and terms in definitive form on such terms as are acceptable to the Company, the Trustee and such Depositary. Thereupon the Company shall execute, and the Trustee or its agent upon receipt of a Company Order for the authentication and delivery of definitive Debt Securities of such series shall authenticate and deliver, without service charge, (A) to each Person specified by such Depositary a new Debt Security or Securities of the same series of like tenor and terms and of any authorized denomination as requested by such Person in aggregate principal amount equal to and in exchange for such Person’s beneficial interest in the Global Security; and (B) to such Depositary a new Global Security of like tenor and terms and in an authorized denomination equal to the difference, if any, between the principal amount of the surrendered Global Security and the aggregate principal amount of Debt Securities delivered to Holders thereof.

     (v) In any exchange provided for in any of the preceding four paragraphs, the Company will execute and the Trustee or its agent will authenticate and deliver individual Debt Securities. In case a Coupon Security of any series is surrendered in exchange for a Registered Security of such series after the close of business (at an office or agency in a Place of Payment for such series) on any special record date and before the opening of business (at such office or agency) on the related proposed date of payment of Defaulted Interest, such Coupon Security shall be surrendered without the Coupon relating to such proposed date of payment and Defaulted Interest will not be payable on such proposed date of payment in respect of the Registered Security issued in exchange for such Coupon Security, but will be payable only to the Holder of such Coupon when due in accordance with the provisions of this Indenture. Upon the exchange of the entire principal amount of a Global Security for individual Debt Securities, such Global Security shall be canceled by the Trustee or its agent. Except as provided in the preceding paragraph, Registered Securities issued in exchange for a Global Security pursuant to this Section 2.15 shall be registered in such names and in such authorized denominations as the Depositary for such Global Security, pursuant to instructions from its direct or indirect participants or otherwise, shall instruct the Trustee or the Registrar. The Trustee or the Registrar shall deliver such Registered Securities to the Persons in whose names such Registered Securities are so registered.

     (vi) Payments in respect of the principal of, premium, if any, and interest on any Debt Securities registered in the name of the Depositary or its nominee will be payable to the Depositary or such nominee in its capacity as the registered owner of such Global Security. The Company and the Trustee may treat the Person in whose name the Debt Securities, including the Global Security, are registered as the owner thereof for the purpose of receiving such payments

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and for any and all other purposes whatsoever. None of the Company, the Trustee, any Registrar, the paying agent or any other agent of the Company or the Trustee will have any responsibility or liability for (A) any aspect of the records relating to or payments made on account of the beneficial ownership interests of the Global Security by the Depositary or its nominee or any of the Depositary’s direct or indirect participants, or for maintaining, supervising or reviewing any records of the Depositary, its nominee or any of its direct or indirect participants relating to the beneficial ownership interests of the Global Security, (B) the payments to the beneficial owners of the Global Security of amounts paid to the Depositary or its nominee, or (C) any other matter relating to the actions and practices of the Depositary, its nominee or any of its direct or indirect participants. None of the Company, the Trustee or any such agent will be liable for any delay by the Depositary, its nominee, or any of its direct or indirect participants in identifying the beneficial owners of the Debt Securities, and the Company, the Trustee and any such agents may conclusively rely on, and will be protected in relying on, instructions from the Depositary or its nominee for all purposes (including with respect to the registration and delivery, and the respective principal amounts, of the Debt Securities to be issued).

     The Trustee shall deliver individual Bearer Securities issued in exchange for a Global Security pursuant to this Section 2.15 to the Persons and in such authorized denominations as the Depositary for such Global Security, pursuant to instructions from its direct or indirect participants or otherwise, shall instruct the Trustee; provided, however, that individual Bearer Securities shall be delivered in exchange for a Global Security only in accordance with the procedures as may be specified pursuant to Section 2.03.

     Notwithstanding the foregoing, the exchange of Bearer Securities for Registered Securities will be subject to the provisions of United States income tax laws and regulations applicable to Debt Securities in effect at the time of such exchange.

     Section 2.16 Medium Term Securities. Notwithstanding any contrary provision herein, if all Debt Securities of a series are not to be originally issued at one time, it shall not be necessary for the Company to deliver to the Trustee an Officers’ Certificate, resolutions of the Board of Directors, supplemental indenture, Opinion of Counsel or written order or any other document otherwise required pursuant to Section 2.01, 2.03, 2.05 or 13.05 at or prior to the time of authentication of each Debt Security of such series if such documents are delivered to the Trustee or its agent at or prior to the authentication upon original issuance of the first such Debt Security of such series to be issued; provided, that any subsequent request by the Company to the Trustee to authenticate Debt Securities of such series upon original issuance shall constitute a representation and warranty by the Company that, as of the date of such request, the statements made in the Officers’ Certificate delivered pursuant to Section 2.05 or 13.05 shall be true and correct as if made on such date and that the Opinion of Counsel delivered at or prior to such time of authentication of an original issuance of Debt Securities shall specifically state that it shall relate to all subsequent issuances of Debt Securities of such series that are identical to the Debt Securities issued in the first issuance of Debt Securities of such series.

     A Company Order delivered by the Company to the Trustee in the circumstances set forth in the preceding paragraph, may provide that Debt Securities which are the subject thereof will be authenticated and delivered by the Trustee or its agent on original issue from time to time upon the telephonic or written order of Persons designated in such written order (any such telephonic instructions to be promptly confirmed in writing by such Person) and that such Persons are authorized to determine, consistent with the Officers’ Certificate, supplemental indenture or resolution of the Board of Directors relating to such written order, such terms and conditions of such Debt Securities as are specified in such Officers’ Certificate, supplemental indenture or such resolution.

     Section 2.17 Defaulted Interest. (a) Any interest on any Debt Security of a particular series which is payable, but is not punctually paid or duly provided for, on the dates and in the manner provided

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in the Debt Securities of such series and in this Indenture (herein called “Defaulted Interest”) shall, if such Debt Security is a Registered Security, forthwith cease to be payable to the Registered Holder thereof on the relevant record date by virtue of having been such Registered Holder, and such Defaulted Interest (plus interest, if any is provided, on such Defaulted Interest to the extent lawful) may be paid by the Company, at its election in each case, as provided in clause (i) or (ii) below:

     (i) The Company may elect to make payment of any Defaulted Interest to the Persons in whose names the Registered Securities of such series are registered at the close of business on a special record date for the payment of such Defaulted Interest, which shall be fixed in the following manner. The Company shall notify the Trustee in writing of the amount of Defaulted Interest proposed to be paid on each such Registered Security of such series and the date of the proposed payment, and at the same time the Company shall deposit with the Trustee an amount of money equal to the aggregate amount proposed to be paid in respect of such Defaulted Interest or shall make arrangements satisfactory to the Trustee for such deposit prior to the date of the proposed payment, such money when deposited to be held in trust for the benefit of the Persons entitled to such Defaulted Interest as in this clause provided. Thereupon the Trustee shall fix a special record date for the payment of such Defaulted Interest which shall be not more than 15 days and not less than 10 days prior to the date of the proposed payment and not less than 10 days after the receipt by the Trustee of the notice of the proposed payment. The Trustee shall promptly notify the Company of such special record date and, in the name and at the expense of the Company, shall cause notice of the proposed payment of such Defaulted Interest and the special record date therefor to be mailed, first class postage pre-paid, to each Holder thereof at its address as it appears in the Security Register, not less than 10 days prior to such special record date. Notice of the proposed payment of such Defaulted Interest and the special record date therefor having been so mailed, such Defaulted Interest shall be paid to the Persons in whose names the Registered Securities of such series are registered at the close of business on such special record date. In case a Coupon Security of any such series is surrendered in exchange for a Registered Security of such series after the close of business (at an office or agency in a Place of Payment for such series) on any special record date and before the opening of business (at such office or agency) on the related proposed date of payment of Defaulted Interest, such Coupon Security shall be surrendered without the Coupon relating to such proposed date of payment and Defaulted Interest will not be payable on such proposed date of payment in respect of the Registered Security issued in exchange for such Coupon Security, but will be payable only to the Holder of such Coupon when due in accordance with the provisions of this Indenture.

     (ii) The Company may make payment of any Defaulted Interest on the Registered Securities of such series in any other lawful manner not inconsistent with the requirements of any securities exchange on which the Registered Securities of such series may be listed, and upon such notice as may be required by such exchange, if, after notice given by the Company to the Trustee of the proposed payment pursuant to this clause, such manner of payment shall be deemed practicable by the Trustee.

     (b) Any Defaulted Interest payable in respect of Bearer Securities of any series shall be payable pursuant to such procedures as may be satisfactory to the Trustee in such manner that there is no discrimination between the Holders of Registered Securities (if any) and Bearer Securities of such series, and notice of the payment date therefor shall be given by the Trustee, in the name and at the expense of the Company, in the manner provided in Section 13.03 not more than 25 days and not less than 20 days prior to the date of the proposed payment.

     Section 2.18 Judgments. The Company may provide pursuant to Section 2.03 for Debt Securities of any series that (a) the obligation, if any, of the Company to pay the principal of, and premium, if any, and interest on, the Debt Securities of any series in a Foreign Currency or Dollars (the “Designated Currency”) as may be specified pursuant to Section 2.03 is of the essence and agrees that, to the fullest

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extent possible under applicable law, judgments in respect of Debt Securities of such series shall be given in the Designated Currency; (b) the obligation of the Company to make payments in the Designated Currency of the principal of, and premium, if any, and interest on, such Debt Securities shall, notwithstanding any payment in any other Currency (whether pursuant to a judgment or otherwise), be discharged only to the extent of the amount in the Designated Currency that the Holder receiving such payment may, in accordance with normal banking procedures, purchase with the sum paid in such other Currency (after any premium and cost of exchange) on the business day in the country of issue of the Designated Currency or in the international banking community (in the case of a composite currency) immediately following the day on which such Holder receives such payment; (c) if the amount in the Designated Currency that may be so purchased for any reason falls short of the amount originally due, the Company shall pay such additional amounts as may be necessary to compensate for such shortfall; and (d) any obligation of the Company not discharged by such payment shall be due as a separate and independent obligation and, until discharged as provided herein, shall continue in full force and effect.

     Section 2.19 CUSIP and ISIN Numbers. The Company in issuing the Securities may use “CUSIP” and “ISIN” numbers (if then generally in use), and, if so, the Trustee shall use such numbers in notices of redemption as a convenience to Holders; provided that any such notice may state that no representation is made as to the accuracy of such numbers either as printed on the Securities or as contained in any notice of a redemption and that reliance may be placed only on the other identification numbers printed on the Securities, and any such redemption shall not be affected by any defect in or omission of such numbers. The Company will promptly notify the Trustee in writing of any change in the “CUSIP” or “ISIN” numbers.

ARTICLE III

REDEMPTION OF DEBT SECURITIES

     Section 3.01 Applicability of Article. The provisions of this Article shall be applicable to the Debt Securities of any series which are redeemable before their Stated Maturity except as otherwise specified as contemplated by Section 2.03 for Debt Securities of such series.

     Section 3.02 Tax Redemption; Special Tax Redemption. (a) Unless otherwise specified pursuant to Section 2.03, Bearer Securities of any series may be redeemed at the option of the Company in whole, but not in part, at any time, on giving not less than 30 or more than 60 days’ notice in accordance with Section 3.03 (which notice shall be irrevocable), at the redemption price thereof (calculated without premium), if the Company has or will become obligated to pay additional interest on such Bearer Securities pursuant to Section 4.06 as a result of any change in, or amendment to, the laws (or any regulations or rulings promulgated thereunder) of the United States or any political subdivision or taxing authority thereof or therein, or any change in the application or official interpretation of such laws, regulations or rulings, which change or amendment becomes effective on or after the date on which any Person (including any Person acting as underwriter, broker or dealer) agrees to purchase any of such Bearer Securities pursuant to their original issuance, and such obligation cannot be avoided by the Company’s taking reasonable measures available to it; provided, that no such notice of redemption shall be given earlier than 90 days prior to the earliest date on which the Company would be obligated to pay such additional interest were a payment in respect of the Bearer Securities of that series then due. Prior to the publication of any notice of redemption pursuant to this Section 3.02(a), the Company shall deliver to the Trustee (i) an Officers’ Certificate stating that the Company is entitled to effect such redemption and setting forth a statement of facts showing that the conditions precedent to the right of the Company so to redeem have occurred and (ii) an Opinion of Counsel to the effect that the Company has or will become obligated to pay such additional interest as a result of such change or amendment.

     (b) Unless otherwise specified pursuant to Section 2.03, if the Company shall determine that any payment made outside the United States by the Company or any of its paying agents in respect of any Bearer Security or Coupon would, under any present or future laws or regulations of the United States, be

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subject to any certification, documentation, information or other reporting requirement of any kind, the effect of which requirement is the disclosure to the Company, any paying agent or any governmental authority of the nationality, residence or identity of a beneficial owner of such Bearer Security or Coupon that is a United States Alien (other than such a requirement (i) that would not be applicable to a payment made by the Company or any one of its paying agents (A) directly to the beneficial owner or (B) to a custodian, nominee or other agent of the beneficial owner, or (ii) that can be satisfied by such custodian, nominee or other agent certifying to the effect that the beneficial owner is a United States Alien; provided, that, in any case referred to in clause (i)(B) or (ii), payment by the custodian, nominee or agent to the beneficial owner is not otherwise subject to any such requirement), then the Company shall elect either (A) to redeem such Bearer Security or Coupon in whole, but not in part, at the redemption price thereof (calculated without premium) or (B) if the conditions of the next succeeding paragraph are satisfied, to pay the additional interest specified in such paragraph. The Company shall make such determination as soon as practicable and publish prompt notice thereof (the “Determination Notice”), stating the effective date of such certification, documentation, information or other reporting requirement, whether the Company elects to redeem the Bearer Security or Coupon or to pay the additional interest specified in the next succeeding paragraph and (if applicable) the last date by which the redemption of the Bearer Security or Coupon must take place, as provided in the next succeeding sentence. If any Bearer Security or Coupon is to be redeemed pursuant to this paragraph, the redemption shall take place on such date, not later than one year after the publication of the Determination Notice, as the Company shall specify by notice given to the Trustee at least two business days before the giving of any notice of redemption to Holders. Notice of such redemption shall be given by the Company to the Holders of the Bearer Security or Coupon not more than 60 days or less than 30 days prior to the redemption date. Notwithstanding the foregoing, the Company shall not so redeem the Bearer Security or Coupon if the Company shall subsequently determine, not less than 30 days prior to the redemption date, that subsequent payments on the Bearer Security or Coupon would not be subject to any such certification, documentation, information or other reporting requirement, in which case the Company shall publish prompt notice of such subsequent determination, and any earlier redemption notice given pursuant to this paragraph shall be revoked and of no further effect. Prior to the publication of any Determination Notice pursuant to this paragraph, the Company shall deliver to the Trustee (1) an Officers’ Certificate stating that the Company is entitled to make such determination and setting forth a statement of facts showing that the conditions precedent to the obligation of the Company to redeem the Bearer Security or Coupon or to pay the additional interest specified in the next succeeding paragraph have occurred and (2) an Opinion of Counsel to the effect that such conditions have occurred.

     If and so long as the certification, documentation, information or other reporting requirement referred to in the preceding paragraph would be fully satisfied by payment of a backup withholding tax or similar charge, the Company may elect to pay as additional interest such amounts as may be necessary so that every net payment made outside the United States following the effective date of such requirement by the Company or any of its paying agents in respect of any Bearer Security or Coupon of which the beneficial owner is a United States Alien (but without any requirement that the nationality, residence or identity of such beneficial owner be disclosed to the Company, any paying agent or any governmental authority), after deduction or withholding for or on account of such backup withholding tax or similar charge that (x) would not be applicable in the circumstances referred to in the parenthetical clause of the first sentence of the preceding paragraph or (y) is imposed as a result of presentation of any such Bearer Security or Coupon for payment more than 15 days after the date on which such payment became due and payable or on which payment thereof was duly provided for, whichever occurred later), will not be less than the amount provided in any such Bearer Security or Coupon to be then due and payable. If the Company elects to pay additional interest pursuant to this paragraph, the Company shall have the right to redeem the Bearer Security or Coupon at any time in whole, but not in part, at the redemption price thereof (calculated without premium), subject to the provisions of the last three sentences of the immediately preceding paragraph. If the Company elects to pay additional interest pursuant to this

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paragraph and the condition specified in the first sentence of this paragraph should no longer be satisfied, then the Company shall redeem the Bearer Security or Coupon in whole, but not in part, at the redemption price thereof (calculated without premium), subject to the provisions of the last three sentences of the immediately preceding paragraph. Any redemption payments made by the Company pursuant to the two immediately preceding sentences shall be subject to the continuing obligation of the Company to pay additional interest pursuant to this paragraph. If the Company elects to, or is required to, redeem the Bearer Security or Coupon pursuant to this paragraph, it shall publish prompt notice thereof. If the Bearer Security or Coupon is to be redeemed pursuant to this paragraph, the redemption shall take place on such date, not later than one year after publication of the notice of redemption, as the Company shall specify by notice to the Trustee at least 60 days prior to the redemption date.

     Section 3.03 Notice of Redemption; Selection of Debt Securities. In case the Company shall desire to exercise the right to redeem all or, as the case may be, any part of the Debt Securities of any series in accordance with their terms, by resolution of the Board of Directors of the Company or a supplemental indenture, the Company shall fix a date for redemption and shall give notice of such redemption at least 30 and not more than 60 days prior to the date fixed for redemption to the Holders of Debt Securities of such series so to be redeemed as a whole or in part, in the manner provided in Section 13.03. The notice if given in the manner herein provided shall be conclusively presumed to have been duly given, whether or not the Holder receives such notice. In any case, failure to give such notice or any defect in the notice to the Holder of any Debt Security of a series designated for redemption as a whole or in part shall not affect the validity of the proceedings for the redemption of any other Debt Security of such series.

     Each such notice of redemption shall specify the date fixed for redemption, the redemption price at which Debt Securities of such series are to be redeemed (or the method of calculating such redemption price), the Place or Places of Payment that payment will be made upon presentation and surrender of such Debt Securities, that any interest accrued to the date fixed for redemption will be paid as specified in said notice, that the redemption is for a sinking fund payment (if applicable), that, unless otherwise specified in such notice, Coupon Securities of any series, if any, surrendered for redemption must be accompanied by all Coupons maturing subsequent to the date fixed for redemption, failing which the amount of any such missing Coupon or Coupons will be deducted from the redemption price, if the Bearer Securities of any series are to be redeemed and any Registered Securities of such series are not to be redeemed, and if such Bearer Securities may be exchanged for Registered Securities not subject to redemption on the applicable redemption date pursuant to Section 2.15(c) or otherwise, the last date on which such exchanges may be made, that, if the Company defaults in making such redemption payment or if the Debt Securities of that series are subordinated pursuant to the terms of Article XII, the paying agent is prohibited from making such payment pursuant to the terms of this Indenture, that on and after said date any interest thereon or on the portions thereof to be redeemed will cease to accrue, that in the case of Original Issue Discount Securities original issue discount accrued after the date fixed for redemption will cease to accrue, the terms of the Debt Securities of that series pursuant to which the Debt Securities of that series are being redeemed, and that no representation is made as to the correctness or accuracy of the CUSIP or ISIN number, if any, listed in such notice or printed on the Debt Securities of that series. If less than all the Debt Securities of a series are to be redeemed, the notice of redemption shall specify the CUSIP or ISIN numbers, if any, of the Debt Securities of that series. In case any Debt Security of a series is to be redeemed in part only, the notice of redemption shall state the portion of the principal amount thereof to be redeemed and shall state that on and after the date fixed for redemption, upon surrender of such Debt Security, a new Debt Security or Debt Securities of that series in principal amount equal to the unredeemed portion thereof, and in the case of a Bearer Security with appropriate Coupons, if any, will be issued.

     At least two business days before the giving of any notice of redemption to Holders, unless the Trustee consents to a shorter period, the Company shall give written notice to the Trustee of the

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redemption date, the principal amount of Debt Securities to be redeemed and the series and terms of the Debt Securities pursuant to which such redemption will occur. Such notice shall be accompanied by an Officers’ Certificate and an Opinion of Counsel from the Company to the effect that such redemption will comply with the conditions herein, and such notice may be revoked at any time prior to the giving of a notice of redemption to the Holders pursuant to this Section 3.02. If fewer than all the Debt Securities of a series are to be redeemed, the record date relating to such redemption shall be selected by the Company and given in writing to the Trustee, which record date shall be not less than three days after the date of notice to the Trustee.

     On or prior to the redemption date for any Registered Securities, the Company shall deposit with the Trustee or with a paying agent (or, if the Company is acting as its own paying agent, segregate and hold in trust) an amount of money in the Currency in which such Debt Securities are denominated (except as provided pursuant to Section 2.03) sufficient to pay the redemption price of such Registered Securities or any portions thereof that are to be redeemed on that date. In the case of any redemption pertaining to Bearer Securities or Coupon Securities, the Company shall, no later than the business day prior to such redemption date, deposit with the Trustee or with a paying agent (other than the Company) an amount of money in the Currency in which such Debt Securities are denominated (except as provided pursuant to Section 2.03) sufficient to pay the redemption price of such Bearer or Coupon Securities or any portion thereof that are to be redeemed on the redemption date.

     If less than all the Debt Securities of like tenor and terms of a series are to be redeemed (other than pursuant to mandatory sinking fund redemptions) the Trustee shall select, on a pro rata basis, by lot or by such other method as in its sole discretion it shall deem appropriate and fair, the Debt Securities of that series or portions thereof (in multiples of $1,000) to be redeemed. In any case where more than one Registered Security of such series is registered in the same name, the Trustee in its discretion may treat the aggregate principal amount so registered as if it were represented by one Registered Security of such series. The Trustee shall promptly notify the Company in writing of the Debt Securities selected for redemption and, in the case of any Debt Securities selected for partial redemption, the principal amount thereof to be redeemed. If any Debt Security called for redemption shall not be so paid upon surrender thereof on such redemption date, the principal, premium, if any, and interest shall bear interest until paid from the redemption date at the rate borne by the Debt Securities of that series. If less than all the Debt Securities of unlike tenor and terms of a series are to be redeemed, the particular Debt Securities to be redeemed shall be selected by the Company. Provisions of this Indenture that apply to Debt Securities called for redemption also apply to portions of Debt Securities called for redemption.

     Section 3.04 Payment of Debt Securities Called for Redemption. If notice of redemption has been given as provided in Section 3.03, the Debt Securities or portions of Debt Securities of the series with respect to which such notice has been given shall become due and payable on the date and at the Place or Places of Payment stated in such notice at the applicable redemption price, together with any interest accrued to the date fixed for redemption, and on and after said date (unless the Company shall default in the payment of such Debt Securities at the applicable redemption price, together with any interest accrued to said date) any interest on the Debt Securities or portions of Debt Securities of any series so called for redemption shall cease to accrue, any original issue discount in the case of Original Issue Discount Securities shall cease to accrue and any Coupons for such interest appertaining to any Coupon Securities to be redeemed, except to the extent described below, shall be void. On presentation and surrender of such Debt Securities at the Place or Places of Payment in said notice specified, the said Debt Securities or the specified portions thereof shall be paid and redeemed by the Company at the applicable redemption price, together with any interest accrued thereon to the date fixed for redemption.

     If any Coupon Security surrendered for redemption shall not be accompanied by all Coupons appertaining thereto maturing on or after the applicable redemption date, the redemption price for such Coupon Security may be reduced by an amount equal to the face amount of all such missing Coupons. If thereafter the Holder of such Coupon shall surrender to any paying agent outside the United States any

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such missing Coupon in respect of which a deduction shall have been made from the redemption price, such Holder shall be entitled to receive the amount so deducted. The surrender of such missing Coupon or Coupons may be waived by the Company and the Trustee, if there be furnished to them such security or indemnity as they may require to save each of them and any paying agent harmless.

     Any Debt Security that is to be redeemed only in part shall be surrendered at the corporate trust office or such other office or agency of the Company as is specified pursuant to Section 2.03 (in the case of Registered Securities) and at the principal London office of the Trustee or such other office or agency of the Company outside the United States as is specified pursuant to Section 2.03 (in the case of Bearer Securities) with, if the Company, the Registrar or the Trustee so requires, due endorsement by, or a written instrument of transfer in form satisfactory to the Company, the Registrar and the Trustee duly executed by, the Holder thereof or his attorney duly authorized in writing, and the Company shall execute, and the Trustee shall authenticate and deliver to the Holder of such Debt Security without service charge, a new Debt Security or Debt Securities of the same series, of like tenor and form, of any authorized denomination as requested by such Holder in aggregate principal amount equal to and in exchange for the unredeemed portion of the principal of the Debt Security so surrendered, and, in the case of a Coupon Security, with appropriate Coupons attached; except that if a Global Security is so surrendered, the Company shall execute, and the Trustee shall authenticate and deliver to the Depositary for such Global Security, without service charge, a new Global Security in a denomination equal to and in exchange for the unredeemed portion of the principal of the Global Security so surrendered. In the case of a Debt Security providing appropriate space for such notation, at the option of the Holder thereof, the Trustee, in lieu of delivering a new Debt Security or Debt Securities as aforesaid, may make a notation on such Debt Security of the payment of the redeemed portion thereof.

     Section 3.05 Mandatory and Optional Sinking Funds. The minimum amount of any sinking fund payment provided for by the terms of Debt Securities of any series, resolution of the Board of Directors or a supplemental indenture is herein referred to as a “mandatory sinking fund payment,” and any payment in excess of such minimum amount provided for by the terms of Debt Securities of any series, resolution of the Board of Directors or a supplemental indenture is herein referred to as an “optional sinking fund payment.”

     In lieu of making all or any part of any mandatory sinking fund payment with respect to any Debt Securities of a series in cash, the Company may at its option (a) deliver to the Trustee Debt Securities of that series (together with the unmatured Coupons, if any, appertaining thereto) theretofore purchased or otherwise acquired by the Company or (b) receive credit for the principal amount of Debt Securities of that series which have been redeemed either at the election of the Company pursuant to the terms of such Debt Securities or through the application of permitted optional sinking fund payments pursuant to the terms of such Debt Securities, resolution or supplemental indenture; provided, that such Debt Securities have not been previously so credited. Such Debt Securities shall be received and credited for such purpose by the Trustee at the redemption price specified in such Debt Securities, resolution or supplemental indenture for redemption through operation of the sinking fund and the amount of such mandatory sinking fund payment shall be reduced accordingly.

     Section 3.06 Redemption of Debt Securities for Sinking Fund. Not less than 60 days prior to each sinking fund payment date for any series of Debt Securities, the Company will deliver to the Trustee an Officers’ Certificate specifying the amount of the next ensuing sinking fund payment for that series pursuant to the terms of that series, any resolution or supplemental indenture, the portion thereof, if any, that is to be satisfied by payment of cash in the Currency in which the Debt Securities of such series are denominated (except as provided pursuant to Section 2.03) and the portion thereof, if any, that is to be satisfied by delivering and crediting Debt Securities of that series pursuant to this Section 3.06 (which Debt Securities, if not previously redeemed, will accompany such certificate) and whether the Company intends to exercise its right to make any permitted optional sinking fund payment with respect to such series. Such certificate shall also state that no Event of Default has occurred and is continuing with

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respect to such series. Such certificate shall be irrevocable, and upon its delivery the Company shall be obligated to make the cash payment or payments therein referred to, if any, on or before the next succeeding sinking fund payment date. Failure of the Company to deliver such certificate (or to deliver the Debt Securities and Coupons, if any, specified in this paragraph) shall not constitute a Default, but such failure shall require that the sinking fund payment due on the next succeeding sinking fund payment date for that series shall be paid entirely in cash and shall be sufficient to redeem the principal amount of such Debt Securities subject to a mandatory sinking fund payment without the option to deliver or credit Debt Securities as provided in this Section 3.06 and without the right to make any optional sinking fund payment, if any, with respect to such series.

     Any sinking fund payment or payments (mandatory or optional) made in cash plus any unused balance of any preceding sinking fund payments made in cash which shall equal or exceed $100,000 (or a lesser sum if the Company shall so request) with respect to the Debt Securities of any particular series shall be applied by the Trustee on the sinking fund payment date on which such payment is made (or, if such payment is made before a sinking fund payment date, on the sinking fund payment date following the date of such payment) to the redemption of such Debt Securities at the Redemption Price specified in such Debt Securities, resolution or supplemental indenture for operation of the sinking fund together with any accrued interest to the date fixed for redemption. Any sinking fund money not so applied or allocated by the Trustee to the redemption of Debt Securities shall be added to the next cash sinking fund payment received by the Trustee for such series and, together with such payment, shall be applied in accordance with the provisions of this Section 3.06. Any and all sinking fund money with respect to the Debt Securities of any particular series held by the Trustee on the last sinking fund payment date with respect to Debt Securities of such series and not held for the payment or redemption of particular Debt Securities shall be applied by the Trustee, together with other money, if necessary, to be deposited sufficient for the purpose, to the payment of the principal of the Debt Securities of that series at its Stated Maturity.

     The Trustee shall select the Debt Securities to be redeemed upon such sinking fund payment date in the manner specified in the last paragraph of Section 3.03 and the Company shall cause notice of the redemption thereof to be given in the manner provided in Section 3.03 except that the notice of redemption shall also state that the Debt Securities are being redeemed by operation of the sinking fund. Such notice having been duly given, the redemption of such Debt Securities shall be made upon the terms and in the manner stated in Section 3.04.

     The Trustee shall not redeem any Debt Securities of a series with sinking fund money or mail any notice of redemption of such Debt Securities by operation of the sinking fund for such series during the continuance of a Default in payment of interest on such Debt Securities or of any Event of Default (other than an Event of Default occurring as a consequence of this paragraph) with respect to such Debt Securities, except that if the notice of redemption of any such Debt Securities shall theretofore have been mailed in accordance with the provisions hereof, the Trustee shall redeem such Debt Securities if cash sufficient for that purpose shall be deposited with the Trustee for that purpose in accordance with the terms of this Article III. Except as aforesaid, any money in the sinking fund for such series at the time when any such Default or Event of Default shall occur and any money thereafter paid into such sinking fund shall, during the continuance of such Default or Event of Default, be held as security for the payment of such Debt Securities; provided, however, that in case such Default or Event of Default shall have been cured or waived as provided herein, such money shall thereafter be applied on the next sinking fund payment date for such Debt Securities on which such money may be applied pursuant to the provisions of this Section 3.06.

ARTICLE IV
PARTICULAR COVENANTS OF THE COMPANY

     Section 4.01 Payment of Principal of, and Premium, If Any, and Interest on, Debt Securities. The Company, for the benefit of each series of Debt Securities, will duly and punctually pay or cause to

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be paid the principal of, and premium, if any, and interest on, each of the Debt Securities and pay any Coupons at the place, at the respective times and in the manner provided herein, in the Debt Securities and in the Coupons. Each installment of interest on the Debt Securities may at the Company’s option be paid by mailing checks for such interest payable to the Person entitled thereto pursuant to Section 2.07(a) to the address of such Person as it appears on the Debt Security Register. Any interest due on Coupon Securities on or before the Stated Maturity of the related Debt Security, other than additional interest, if any, payable as provided in Section 4.06 in respect of principal of, or premium, if any, on such a Debt Security, shall be payable only upon presentation and surrender of the several Coupons for such interest installments as are evidenced thereby as they severally mature.

     Principal of and premium, if any, and interest on Debt Securities of any series shall be considered paid on the date due if on such date the Trustee or any paying agent holds in accordance with this Indenture money sufficient to pay in the Currency in which the Debt Securities of such series are denominated (except as provided pursuant to Section 2.03) all principal, premium and interest then due and, in the case of Debt Securities subordinated pursuant to the terms of Article XII, the Trustee or such paying agent, as the case may be, is not prohibited from paying such money to the Holders on that date pursuant to the terms of this Indenture.

     The Company shall pay interest on overdue principal or premium, if any, at the rate specified therefor in the Debt Securities and it shall pay interest on overdue installments of interest at the same rate to the extent lawful.

     Section 4.02 Maintenance of Offices or Agencies for Registration of Transfer, Exchange and Payment of Debt Securities. The Company will maintain in each Place of Payment for any series of Debt Securities and Coupons, if any, an office or agency where Debt Securities and Coupons of such series (but, except as otherwise provided in Section 2.12, unless such Place of Payment is located outside the United States, not Bearer Securities or Coupons) may be presented or surrendered for payment, where Debt Securities of such series may be surrendered for transfer or exchange and where notices and demands to or upon the Company in respect of the Debt Securities and Coupons of such series and this Indenture may be served. So long as any Bearer Securities of any series remain outstanding, the Company will maintain for such purposes one or more offices or agencies outside the United States in such city or cities specified pursuant to Section 2.03 and, if any Bearer Securities are listed on a securities exchange that requires an office or agency for the payment of principal of, and premium, if any, or interest on, such Bearer Securities in a location other than the location of an office or agency specified pursuant to Section 2.03, the Company will maintain for such purposes an office or agency in such location so long as any Bearer Securities are listed on such securities exchange and such exchange so requires. The Company will give prompt written notice to the Trustee of the location, and any change in the location, of such office or agency. If at any time the Company shall fail to maintain any such required office or agency or shall fail to furnish the Trustee with the address thereof, such presentations, surrenders, notices and demands may be made or served at the office of the Trustee referred to in Section 13.03 hereof, (in the case of Registered Securities) and at the principal London office of the Trustee (in the case of Bearer Securities), and the Company hereby appoints the Trustee as its agent to receive all presentations, surrenders, notices and demands.

     The Company may also from time to time designate different or additional offices or agencies to be maintained for such purposes (in or outside of such Place of Payment), and may from time to time rescind any such designation; provided, however, that no such designation or rescission shall in any manner relieve the Company of its obligations described in the preceding paragraph. The Company will give prompt written notice to the Trustee of any such additional designation or rescission of designation and any change in the location of any such different or additional office or agency.

     Section 4.03 Appointment to Fill a Vacancy in the Office of Trustee. The Company, whenever necessary to avoid or fill a vacancy in the office of Trustee, will appoint, in the manner provided in

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Section 7.08, a Trustee, so that there shall at all times be a Trustee hereunder with respect to each series of Debt Securities.

     Section 4.04 Duties of Paying Agents, Etc. (a) The Company shall cause each paying agent, if any, other than the Trustee, to execute and deliver to the Trustee an instrument in which such agent shall agree with the Trustee, subject to the provisions of this Section 4.04,

     (i) that it will hold all sums held by it as such agent for the payment of the principal of, and premium, if any, or interest on, the Debt Securities of any series and the payment of any related Coupons (whether such sums have been paid to it by the Company or by any other obligor on the Debt Securities or Coupons of such series) in trust for the benefit of the Holders of the Debt Securities and Coupons of such series;

     (ii) that it will give the Trustee notice of any failure by the Company (or by any other obligor on the Debt Securities or Coupons of such series) to make any payment of the principal of, and premium, if any, or interest on, the Debt Securities of such series or any payment on any related Coupons when the same shall be due and payable; and

     (iii) that it will at any time during the continuance of an Event of Default, upon the written request of the Trustee, forthwith pay to the Trustee all sums so held by it as such agent.

     (b) If the Company shall act as its own paying agent, it will, on or before each due date of the principal of, and premium, if any, or interest on, the Debt Securities and Coupons, if any, of any series, set aside, segregate and hold in trust for the benefit of the Holders of the Debt Securities and Coupons of such series a sum sufficient to pay such principal, premium, if any, or interest so becoming due. The Company will promptly notify the Trustee of any failure by the Company to take such action or the failure by any other obligor on such Debt Securities or Coupons to make any payment of the principal of, and premium, if any, or interest on, such Debt Securities or Coupons when the same shall be due and payable.

     (c) Anything in this Section 4.04 to the contrary notwithstanding, the Company may, at any time, for the purpose of obtaining a satisfaction and discharge of this Indenture, or for any other reason, pay or cause to be paid to the Trustee all sums held in trust by it or any paying agent, as required by this Section 4.04, such sums to be held by the Trustee upon the same trusts as those upon which such sums were held by the Company or such paying agent.

     (d) Whenever the Company shall have one or more paying agents with respect to any series of Debt Securities and Coupons, it will, prior to each due date of the principal of, and premium, if any, or interest on, any Debt Securities of such series, deposit with any such paying agent a sum sufficient to pay the principal, premium or interest so becoming due, such sum to be held in trust for the benefit of the Persons entitled thereto, and (unless any such paying agent is the Trustee) the Company will promptly notify the Trustee of its action or failure so to act.

     (e) Anything in this Section 4.04 to the contrary notwithstanding, the agreement to hold sums in trust as provided in this Section 4.04 is subject to the provisions of Section 11.05.

     Section 4.05 Statement by Officers as to Default. The Company shall, so long as any of the Debt Securities are Outstanding, deliver to the Trustee, on or before a date not more than four months after the end of each fiscal year of the Company (currently on a calendar year basis) ending after the date hereof, an Officers’ Certificate stating that a review of the activities of the Company during the preceding fiscal year has been made under the supervision of the officers signing the certificate with a view to determining whether the Company has kept, observed, performed and fulfilled its obligations under this Indenture, and further stating, as to each officer signing such certificate, whether or not to the best of his knowledge any Default occurred during such fiscal year (or, if a Default or Event of Default shall have

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occurred, describing all such Defaults or Events of Default of which such officer may have knowledge and what action the Company is taking or proposes to take with respect thereto).

     Section 4.06 Payment of Additional Interest. Unless otherwise provided pursuant to Section 2.03, the provisions of this Section 4.06 shall be applicable to Bearer Securities of any series.

     The Company will, subject to the exceptions and limitations set forth below, pay as additional interest to the Holder of any Bearer Security or Coupon that is a United States Alien such amounts as may be necessary so that every net payment on such Bearer Security or Coupon, after deduction or withholding for or on account of any present or future tax, assessment or other governmental charge imposed upon or as a result of such payment by the United States (or any political subdivision or taxing authority thereof or therein), will not be less than the amount provided in such Bearer Security or Coupon to be then due and payable. However, the Company will not be required to make any such payment of additional interest for or on account of:

     (a) any tax, fee, assessment or other governmental charge that would not have been imposed but for (i) the existence of any present or former connection between such Holder (or between a fiduciary, settlor or beneficiary of, or a Person holding a power over, such Holder, if such Holder is an estate or a trust, or a member or shareholder of such Holder, if such Holder is a partnership or corporation) and the United States, including such Holder (or such fiduciary, settlor, beneficiary, Person holding a power, member or shareholder) being or having been a citizen or resident thereof or being or having been engaged in trade or business or present therein or having or having had a permanent establishment therein or (ii) such Holder’s past or present status for United States Federal income tax purposes as a personal holding company, foreign personal holding company or private foundation or other tax-exempt organization with respect to the United States or as a corporation that accumulates earnings to avoid United States Federal income tax;

     (b) any estate, inheritance, gift, sales, transfer or personal property tax or any similar tax, assessment or other governmental charge;

     (c) any tax, fee, assessment or other governmental charge that would not have been imposed but for the presentation by the Holder of a Bearer Security or Coupon for payment more than 15 days after the date on which such payment became due and payable or on which payment thereof was duly provided for, whichever occurs later;

     (d) any tax, fee, assessment or other governmental charge that is payable otherwise than by deduction or withholding from a payment on a Bearer Security or Coupon;

     (e) any tax, fee, assessment or other governmental charge that would not have been imposed but for a failure to comply with applicable certification, documentation, information or other reporting requirement concerning the nationality, residence, identity or connection with the United States of the Holder or beneficial owner of a Bearer Security or Coupon if, without regard to any tax treaty, such compliance is required by statute or regulation of the United States as a precondition to relief or exemption from such tax, assessment or other governmental charge; or

     (f) any tax, fee, assessment or other governmental charge imposed on a Holder that actually or constructively owns 10 percent or more of the combined voting power of all classes of stock of the Company or that is a controlled foreign corporation related to the Company through stock ownership;

nor shall additional interest be paid with respect to a payment on a Bearer Security or Coupon to a Holder that is a fiduciary or partnership or other than the sole beneficial owner of such payment to the extent a beneficiary or settlor with respect to such fiduciary or a member of such partnership or a beneficial owner would not have been entitled to the additional interest had such beneficiary, settlor, member or beneficial owner been the Holder of such Bearer Security or Coupon.

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     Whenever in this Indenture there is mentioned, in any context, the payment of the principal of, or premium, if any, or interest on, any Debt Security or payment with respect to any Coupon of any series, such mention shall be deemed to include mention of the payment of additional interest provided for in the terms of such Debt Securities and this Section 4.06 to the extent that, in such context, additional interest is, was or would be payable in respect thereof pursuant to the provisions of this Section 4.06 and express mention of the payment of additional interest (if applicable) in any provisions hereof shall not be construed as excluding additional interest in those provisions hereof where such express mention is not made.

     If the payment of additional interest becomes required in respect of the Debt Securities or Coupons of a series, at least 10 days prior to the first interest payment date with respect to which such additional interest will be payable (or if the Debt Securities of that series will not bear interest prior to its Stated Maturity, the first day on which a payment of principal, and premium, if any, is made and on which such additional interest will be payable), and at least 10 days prior to each date of payment of principal, and premium, if any, or interest if there has been any change with respect to the matters set forth in the below-mentioned Officers’ Certificate, the Company will furnish the Trustee and each paying agent with an Officers’ Certificate that shall specify by country the amount, if any, required to be withheld on such payments to Holders of Debt Securities or Coupons that are United States Aliens, and the Company will pay to the Trustee or such paying agent the additional interest, if any, required by the terms of such Debt Securities and this Section 4.06. The Company covenants to indemnify the Trustee and any paying agent for, and to hold them harmless against, any and all loss, liability or expense reasonably incurred without negligence or bad faith on their part arising out of or in connection with actions taken or omitted by any of them in reliance on any Officers’ Certificate furnished pursuant to this Section 4.06.

     Section 4.07 SEC Reports; Notice of Defaults.

     (a) The Company shall, so long as any of the Debt Securities are Outstanding, file with the Trustee, within 30 days after it files the same with the SEC, copies of the annual reports and the information, documents and other reports (or copies of such portions of any of the foregoing as the SEC may by rules and regulations prescribe) that the Company is required to file with the SEC pursuant to Section 13 or 15(d) of the Exchange Act (unless such information, documents or reports are available on the SEC’s Electronic Data Gathering, Analysis and Retrieval system (or any successor thereto)). The Company shall also comply with the provisions of Section 314 (a) of the Trust Indenture Act. The Company shall be deemed to have complied with the previous sentence to the extent that such information, documents and reports are filed with the SEC via EDGAR (or any successor electronic delivery procedure).

     (b) The Company shall, so long as any of the Debt Securities are Outstanding, deliver to the Trustee, within 30 days of any officer of the Company who is capable of executing a Company Order becoming aware of the occurrence of any Event of Default, an Officers’ Certificate specifying such Event of Default, the status thereof and what action the Company is taking or proposes to take with respect thereto.

     (c) Delivery of such reports, information and documents to the Trustee is for informational purposes only, and the Trustee’s receipt of such shall not constitute constructive notice of any information contained therein or determinable from information contained therein, including the Partnership’s compliance with any of its covenants hereunder (as to which the Trustee is entitled to rely exclusively on an Officer’s Certificate).

     Section 4.08 Further Instruments and Acts. The Company will, upon request of the Trustee, execute and deliver such further instruments and do such further acts as may reasonably be necessary or proper to carry out more effectually the purposes of this Indenture.

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     Section 4.09 Existence. Except as permitted by Article X, the Company will do or cause to be done all things necessary to preserve and keep in full force and effect its existence.

     Section 4.10 Maintenance of Properties. The Company will cause all properties owned by the Company or any of its Subsidiaries or used or held for use in the conduct of its business or the business of any such Subsidiary to be maintained and kept in good condition, repair and working order (reasonable wear and tear excepted) and supplied with all necessary equipment and will cause to be made all necessary repairs, renewals, replacements, betterments and improvements thereof, all as in the judgment of the Company may be necessary so that the business carried on in connection therewith may be properly and advantageously conducted at all times; provided, however, that nothing in this Section shall prevent the Company from discontinuing the operation or maintenance of any of such properties if such discontinuance is, in the judgment of the Company, desirable in the conduct of its business or the business of any such Subsidiary and not disadvantageous in any material respect to the Holders.

     Section 4.11 Payment of Taxes and Other Claims. The Company will pay or discharge or cause to be paid or discharged, before the same shall become delinquent, (a) all taxes, assessments and governmental charges levied or imposed upon the Company or any Subsidiary or upon the income, profits or property of the Company or any Subsidiary, and (b) all lawful claims for labor, materials and supplies which, if unpaid, might by law become a Lien upon the property of the Company or any Subsidiary; provided, however, that the Company shall not be required to pay or discharge or cause to be paid or discharged any such tax, assessment, charge or claim whose amount, applicability or validity is being contested in good faith by appropriate proceedings.

     Section 4.12 Waiver of Certain Covenants. The Company may, with respect to the Debt Securities of any series, omit in any particular instance to comply with any covenant set forth in this Article IV (except Sections 4.01 through 4.09) or made applicable to such Debt Securities pursuant to Section 2.03, if, before or after the time for such compliance, the Holders of not less than a majority in aggregate principal amount of the Outstanding Debt Securities of each series affected, waive such compliance in such instance with such covenant, but no such waiver shall extend to or affect such covenant except to the extent so expressly waived, and, until such waiver shall become effective, the obligations of the Company and the duties of the Trustee in respect of any such covenant shall remain in full force and effect.

ARTICLE V
HOLDERS’ LISTS AND REPORTS
BY THE TRUSTEE

     Section 5.01 Company to Furnish Trustee Information as to Names and Addresses of Holders; Preservation of Information. The Company covenants and agrees that it will furnish or cause to be furnished to the Trustee with respect to the Registered Securities of each series:

     (a) not more than 15 days after each record date with respect to the payment of interest, if any, a list, in such form as the Trustee may reasonably require, of the names and addresses of the Registered Holders as of such record date, and

     (b) at such other times as the Trustee may request in writing, within 30 days after the receipt by the Company of any such request, a list of similar form and contents as of a date not more than 15 days prior to the time such list is furnished;

provided, however, that so long as the Trustee shall be the Registrar, such lists shall not be required to be furnished.

     The Company shall also be required to furnish to the Trustee at all such times set forth above all information in the possession or control of the Company or any of its paying agents other than the Trustee

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as to the names and addresses of the Bearer Holders of all series; provided, however, that the Company shall have no obligation to investigate any matter relating to any Bearer Holders.

     The Trustee shall preserve, in as current a form as is reasonably practicable, all information as to the names and addresses of the Holders (i) contained in the most recent list furnished to it as provided in this Section 5.01 or (ii) received by it in the capacity of paying agent or Registrar (if so acting) hereunder.

     The Trustee may destroy any list furnished to it as provided in this Section 5.01 upon receipt of a new list so furnished.

     Section 5.02 Communications to Holders. Holders may communicate pursuant to Section 312(b) of the Trust Indenture Act with other Holders with respect to their rights under this Indenture or the Debt Securities. The Company, the Trustee, the Registrar and anyone else shall have the protection of Section 312(c) of the Trust Indenture Act.

     Section 5.03 Reports by Trustee. Within 60 days after each January 31, beginning with the first January 31 following the date of this Indenture, and in any event on or before April 1 in each year, the Trustee shall mail to Holders a brief report dated as of such January 31 that complies with Section 313(a) of the Trust Indenture Act; provided, however, that if no event described in Section 313 (a) of the Trust Indenture Act has occurred within the 12 months preceding the reporting date, no report need be transmitted. The Trustee also shall comply with Section 313(b) of the Trust Indenture Act.

     Reports pursuant to this Section 5.03 shall be transmitted by mail:

     (a) to all Registered Holders, as the names and addresses of such Holders appear in the Debt Security Register;

     (b) to such Bearer Holders of any series as have, within two years preceding such transmission, filed their names and addresses with the Trustee for such series for that purpose; and

     (c) except in the cases of reports under Section 313(b)(2) of the Trust Indenture Act, to each Holder of a Debt Security of any series whose name and address appear in the information preserved at the time by the Trustee in accordance with Section 5.02.

     A copy of each report at the time of its mailing to Holders shall be filed with the SEC and each stock exchange (if any) on which the Debt Securities of any series are listed. The Company agrees to notify promptly the Trustee whenever the Debt Securities of any series become listed on any stock exchange and of any delisting thereof.

     Section 5.04 Record Dates for Action by Holders. If the Company shall solicit from the holders of Debt Securities of any series any action (including the making of any demand or request, the giving of any direction, notice, consent or waiver or the taking of any other action), the Company may, at its option, by resolution of the Board of Directors, fix in advance a record date for the determination of Holders of Debt Securities entitled to take such action, but the Company shall have no obligation to do so. Any such record date shall be fixed at the Company’s discretion. If such a record date is fixed, such action may be sought or given before or after the record date, but only the Holders of Debt Securities of record at the close of business on such record date shall be deemed to be Holders of Debt Securities for the purpose of determining whether Holders of the requisite proportion of Debt Securities of such series Outstanding have authorized or agreed or consented to such action, and for that purpose the Debt Securities of such series Outstanding shall be computed as of such record date.

ARTICLE VI
REMEDIES OF THE TRUSTEE AND HOLDERS IN EVENT OF DEFAULT

     Section 6.01 Events of Default. If any one or more of the following shall have occurred and be continuing with respect to Debt Securities of any series (each of the following, an “Event of Default”):

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     (a) default in the payment of any installment of interest upon any Debt Securities of that series or any payment with respect to the related Coupons, if any, as and when the same shall become due and payable, whether or not such payment shall be prohibited by Article XII, if applicable, and continuance of such default for a period of 30 days; or

     (b) default in the payment of the principal of or premium, if any, on any Debt Securities of that series as and when the same shall become due and payable, whether at Stated Maturity, upon redemption, by declaration, upon required repurchase or otherwise, whether or not such payment shall be prohibited by Article XII, if applicable; or

     (c) default in the payment of any sinking fund payment with respect to any Debt Securities of that series as and when the same shall become due and payable; or

     (d) failure on the part of the Company to comply with Article X; or

     (e) failure on the part of the Company duly to observe or perform any other of the covenants or agreements on the part of the Company in the Debt Securities of that series, in any resolution of the Board of Directors authorizing the issuance of that series of Debt Securities, in this Indenture with respect to such series or in any supplemental indenture with respect to such series (other than a covenant a default in the performance of which is elsewhere in this Section specifically dealt with), continuing for a period of 90 days after the date on which written notice specifying such failure and requiring the Company to remedy the same shall have been given, by registered or certified mail, to the Company by the Trustee or to the Company and the Trustee by the Holders of at least 25% in aggregate principal amount of the Debt Securities of that series at the time Outstanding; or

     (f) Indebtedness of the Company is not paid within any applicable grace period after final maturity or is accelerated by the holders thereof because of a default, the total amount of such Indebtedness unpaid or accelerated exceeds $50,000,000 or its Dollar Equivalent at the time and such default remains uncured or such acceleration is not rescinded for 10 days after the date on which written notice specifying such failure and requiring the Company to remedy the same shall have been given, by registered or certified mail, to the Company by the Trustee or to the Company and the Trustee by the Holders of at least 25% in aggregate principal amount of the Debt Securities of that series at the time Outstanding; or

     (g) the Company or any of its Significant Subsidiaries shall (i) voluntarily commence any proceeding or file any petition seeking relief under Title 11 of the United States Code or any other Federal or State bankruptcy, insolvency or similar law, (ii) consent to the institution of, or fail to controvert within the time and in the manner prescribed by law, any such proceeding or the filing of any such petition, (iii) apply for or consent to the appointment of a receiver, trustee, custodian, sequestrator or similar official for the Company or any such Significant Subsidiary or for a substantial part of its property, (iv) file an answer admitting the material allegations of a petition filed against it in any such proceeding, (v) make a general assignment for the benefit of creditors, (vi) admit in writing its inability to pay its debts as they become due, (vii) take corporate action for the purpose of effecting any of the foregoing, or (viii) take any comparable action under any foreign laws relating to insolvency; or

     (h) the entry of an order or decree by a court having competent jurisdiction for (i) relief in respect of the Company or any of its Significant Subsidiaries or a substantial part of any of their property under Title 11 of the United States Code or any other Federal or State bankruptcy, insolvency or similar law, (ii) the appointment of a receiver, trustee, custodian, sequestrator or similar official for the Company or any such Significant Subsidiary or for a substantial part of any of their property (except any decree or order appointing such official of any Significant Subsidiary pursuant to a plan under which the assets and operations of such Significant Subsidiary are transferred to or combined with another Subsidiary or Subsidiaries of the Company or to the Company) or (iii) the winding-up or liquidation of the Company or any such Significant Subsidiary (except any decree or order approving or ordering the winding up or

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liquidation of the affairs of a Significant Subsidiary pursuant to a plan under which the assets and operations of such Significant Subsidiary are transferred to or combined with another Subsidiary or Subsidiaries of the Company or to the Company); and such order or decree shall continue unstayed and in effect for 60 consecutive days; or any similar relief is granted under any foreign laws and the order or decree stays in effect for 60 consecutive days; or

     (i) any other Event of Default provided with respect to Debt Securities of that series;

then, and in each and every case that an Event of Default described in clause (a), (b), (c), (d), (e), (f) or (i) with respect to Debt Securities of that series at the time Outstanding occurs and is continuing, unless the principal of, premium, if any, and accrued and unpaid interest on all the Debt Securities of that series shall have already become due and payable, either the Trustee or the Holders of not less than 25% in aggregate principal amount of the Debt Securities of that series then Outstanding hereunder, by notice in writing to the Company (and to the Trustee if given by Holders), may declare the principal of (or, if the Debt Securities of that series are Original Issue Discount Debt Securities, such portion of the principal amount as may be specified in the terms of that series), premium, if any, and interest on all the Debt Securities of that series to be due and payable immediately, and upon any such declaration the same shall become and shall be immediately due and payable, anything in this Indenture or in the Debt Securities or Coupons appertaining thereto of that series contained to the contrary notwithstanding. If an Event of Default described in clause (g) or (h) occurs, then and in each and every such case, unless the principal of, premium, if any, and accrued and unpaid interest on all the Debt Securities shall have become due and payable, the principal of (or, if the Debt Securities of that series are Original Issue Discount Debt Securities, such portion of the principal amount as may be specified in the terms thereof) , premium, if any, and interest on all the Debt Securities then Outstanding hereunder shall ipso facto become and be immediately due and payable without any declaration or other act on the part of the Trustee or any Holders, anything in this Indenture or in the Debt Securities contained to the contrary notwithstanding.

     The Holders of not less than a majority in aggregate principal amount of the Debt Securities of a particular series by written notice to the Trustee may rescind an acceleration and its consequences if the rescission would not conflict with any judgment or decree of a court of competent jurisdiction already rendered and if all existing Events of Default with respect to that series have been cured or waived except nonpayment of principal, premium, if any, or interest that has become due solely because of acceleration. Upon any such rescission, the parties hereto shall be restored respectively to their several positions and rights hereunder, and all rights, remedies and powers of the parties hereto shall continue as though no such proceeding had been taken.

     In case the Trustee or any Holder shall have proceeded to enforce any right under this Indenture and such proceedings shall have been discontinued or abandoned because of such rescission or annulment or for any other reason or shall have been determined adversely to the Trustee or such Holder, then and in every such case the parties hereto shall be restored respectively to their several positions and rights hereunder, and all rights, remedies and powers of the parties hereto shall continue as though no such proceeding had been taken.

     Section 6.02 Collection of Indebtedness by Trustee, Etc. If an Event of Default occurs and is continuing, the Trustee, in its own name and as trustee of an express trust, shall be entitled and empowered to institute any action or proceedings at law or in equity for the collection of the sums so due and unpaid or enforce the performance of any provision of the Debt Securities of the affected series or this Indenture, and may prosecute any such action or proceedings to judgment or final decree, and may enforce any such judgment or final decree against the Company or any other obligor upon the Debt Securities, and the Coupons, if any, appertaining thereto, of such series (and collect in the manner provided by law out of the property of the Company or any other obligor upon the Debt Securities and Coupons of such series wherever situated the money adjudged or decreed to be payable).

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     In case there shall be pending proceedings for the bankruptcy or for the reorganization of the Company or any other obligor upon the Debt Securities and Coupons, if any, of any series under Title 11 of the United States Code or any other Federal or State bankruptcy, insolvency or similar law, or in case a receiver, trustee or other similar official shall have been appointed for its property, or in case of any other similar judicial proceedings relative to the Company or any other obligor upon the Debt Securities of any series, its creditors or its property, the Trustee, irrespective of whether the principal of Debt Securities and Coupons, if any, of any series shall then be due and payable as therein expressed or by declaration or otherwise and irrespective of whether the Trustee shall have made any demand pursuant to the provisions of this Section 6.02, shall be entitled and empowered, by intervention in such proceedings or otherwise, to file and prove a claim or claims for the whole amount of principal, premium, if any, and interest (or, if the Debt Securities of such series are Original Issue Discount Debt Securities, such portion of the principal amount as may be specified in the terms of such series) owing and unpaid in respect of the Debt Securities and Coupons of such series, and to file such other papers or documents as may be necessary or advisable in order to have the claims of the Trustee (including any claim for reasonable compensation to the Trustee, its agents, attorneys and counsel, and for reimbursement of all expenses and liabilities Incurred, and all advances made, by the Trustee except as a result of its negligence or bad faith) and of the Holders thereof allowed in any such judicial proceedings relative to the Company, or any other obligor upon the Debt Securities and Coupons of such series, its creditors or its property, and to collect and receive any money or other property payable or deliverable on any such claims, and to distribute all amounts received with respect to the claims of such Holders and of the Trustee on their behalf, and any receiver, assignee or trustee in bankruptcy or reorganization is hereby authorized by each of such Holders to make payments to the Trustee, and, in the event that the Trustee shall consent to the making of payments directly to such Holders, to pay to the Trustee such amount as shall be sufficient to cover reasonable compensation to the Trustee, its agents, attorneys and counsel, and all other reasonable expenses and liabilities Incurred, and all advances made, by the Trustee except as a result of its negligence or bad faith.

     All rights of action and of asserting claims under this Indenture, or under any of the Debt Securities and the Coupons, if any, appertaining thereto, of any series, may be enforced by the Trustee without the possession of any such Debt Securities or Coupons, or the production thereof in any trial or other proceedings relative thereto, and any such action or proceedings instituted by the Trustee shall be brought in its own name as trustee of an express trust, and any recovery of judgment (except for any amounts payable to the Trustee pursuant to Section 7.06) shall be for the ratable benefit of the Holders of all the Debt Securities or Coupons in respect of which such action was taken.

     In case of an Event of Default hereunder the Trustee may in its discretion proceed to protect and enforce the rights vested in it by this Indenture by such appropriate judicial proceedings as the Trustee shall deem most effectual to protect and enforce any of such rights, either at law or in equity or in bankruptcy or otherwise, whether for the specific enforcement of any covenant or agreement contained in this Indenture or in aid of the exercise of any power granted in this Indenture, or to enforce any other legal or equitable right vested in the Trustee by this Indenture or by law.

     Section 6.03 Application of Money Collected by Trustee. Any money or other property collected by the Trustee pursuant to Section 6.02 with respect to Debt Securities and Coupons, if any, of any series shall be applied, after giving effect to the provisions of Article XII, if applicable, in the order following, at the date or dates fixed by the Trustee for the distribution of such money or other property, upon presentation of the several Debt Securities or Coupons of such series in respect of which money or other property have been collected, and the notation thereon of the payment, if only partially paid, and upon surrender thereof if fully paid:

     FIRST: To the payment of all money due the Trustee pursuant to Section 7.06;

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     SECOND: In case the principal of the Outstanding Debt Securities in respect of which such money have been collected shall not have become due, to the payment of interest on the Debt Securities or Coupons of such series in the order of the maturity of the installments of such interest, with interest (to the extent that such interest has been collected by the Trustee) upon the overdue installments of interest at the rate or Yield to Maturity (in the case of Original Issue Discount Debt Securities) borne by the Debt Securities or Coupons of such series, such payments to be made ratably to the Persons entitled thereto, without discrimination or preference;

     THIRD: In case the principal of the Outstanding Debt Securities in respect of which such money have been collected shall have become due, by declaration or otherwise, to the payment of the whole amount then owing and unpaid upon the Debt Securities or Coupons of such series for principal and premium, if any, and interest, with interest on the overdue principal and premium, if any, and (to the extent that such interest has been collected by the Trustee) upon overdue installments of interest at the rate or Yield to Maturity (in the case of Original Issue Discount Debt Securities) borne by the Debt Securities or Coupons of such series; and, in case such money shall be insufficient to pay in full the whole amount so due and unpaid upon the Debt Securities and Coupons of such series, then to the payment of such principal and premium, if any, and interest, without preference or priority of principal and premium, if any, over interest, or of interest over principal and premium, if any, or of any installment of interest over any other installment of interest, or of any Debt Security or Coupon of such series over any Debt Security or Coupon of such series, ratably to the aggregate of such principal and premium, if any, and interest; and

     FOURTH: The remainder, if any, shall be paid to the Company, its successors or assigns, or to whomsoever may be lawfully entitled to receive the same, or as a court of competent jurisdiction may direct.

     The Trustee may fix a record date and payment date for any payment to Holders pursuant to this Section 6.03. At least 15 days before such record date, the Company shall mail to each Holder and the Trustee a notice that states the record date, the payment date and amount to be paid.

     Section 6.04 Limitation on Suits by Holders. No Holder of any Debt Security or Coupon of any series shall have any right by virtue or by availing of any provision of this Indenture to institute any action or proceeding at law or in equity or in bankruptcy or otherwise, upon or under or with respect to this Indenture, or for the appointment of a receiver or trustee, or for any other remedy hereunder, unless such Holder previously shall have given to the Trustee written notice of an Event of Default with respect to Debt Securities of that same series and of the continuance thereof and unless the Holders of not less than 25% in aggregate principal amount of the Outstanding Debt Securities of that series shall have made written request upon the Trustee to institute such action or proceedings in respect of such Event of Default in its own name as Trustee hereunder and shall have offered to the Trustee such reasonable indemnity or security as it may require against the costs, expenses and liabilities to be Incurred therein or thereby, and the Trustee, for 90 days after its receipt of such notice, request and offer of indemnity or security shall have failed to institute any such action or proceedings and no direction inconsistent with such written request shall have been given to the Trustee pursuant to Section 6.06; it being understood and intended, and being expressly covenanted by the Holder of every Debt Security or Coupon with every other Holder and the Trustee, that no one or more Holders shall have any right in any manner whatever by virtue or by availing of any provision of this Indenture to affect, disturb or prejudice the rights of any Holders, or to obtain or seek to obtain priority over or preference to any other such Holder, or to enforce any right under this Indenture, except in the manner herein provided and for the equal, ratable and common benefit of all such Holders. For the protection and enforcement of the provisions of this Section 6.04, each and every Holder and the Trustee shall be entitled to such relief as can be given either at law or in equity.

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     Notwithstanding any other provision in this Indenture, however, the right of any Holder of any Debt Security or Coupon to receive payment of the principal of, and premium, if any, and (subject to Section 2.12) interest on, such Debt Security or Coupon, on or after the respective due dates expressed in such Debt Security, and to institute suit for the enforcement of any such payment on or after such respective dates, shall not be impaired or affected without the consent of such Holder.

     Section 6.05 Remedies Cumulative; Delay or Omission in Exercise of Rights Not a Waiver of Default. All powers and remedies given by this Article VI to the Trustee or to the Holders shall, to the extent permitted by law, be deemed cumulative and not exclusive of any thereof or of any other powers and remedies available to the Trustee or the Holders, by judicial proceedings or otherwise, to enforce the performance or observance of the covenants and agreements contained in this Indenture, and no delay or omission of the Trustee or of any Holder to exercise any right or power accruing upon any Default occurring and continuing as aforesaid, shall impair any such right or power, or shall be construed to be a waiver of any such Default or an acquiescence therein; and, subject to the provisions of Section 6.04, every power and remedy given by this Article VI or by law to the Trustee or to the Holders may be exercised from time to time, and as often as shall be deemed expedient, by the Trustee or by the Holders.

     Section 6.06 Rights of Holders of Majority in Principal Amount of Debt Securities to Direct Trustee and to Waive Default. The Holders of not less than a majority in aggregate principal amount of the Debt Securities of any series at the time Outstanding shall have the right to direct the time, method, and place of conducting any proceeding for any remedy available to the Trustee, or of exercising any right, trust or power conferred on the Trustee, with respect to the Debt Securities of such series; provided, however, that such direction shall not be otherwise than in accordance with law and the provisions of this Indenture, and that subject to the provisions of Section 7.01, the Trustee shall have the right to decline to follow any such direction if the Trustee being advised by counsel shall determine that the action so directed may not lawfully be taken or is inconsistent with any provision of this Indenture, or if the Trustee shall by a responsible officer or officers determine that the action so directed would involve it in personal liability or would be unduly prejudicial to Holders of Debt Securities of such series not taking part in such direction; and provided, further, however, that nothing in this Indenture contained shall impair the right of the Trustee to take any action deemed proper by the Trustee and which is not inconsistent with such direction by such Holders. The Holders of not less than a majority in aggregate principal amount of the Debt Securities of any series at the time Outstanding may on behalf of the Holders of all the Debt Securities and any related Coupons of that series waive any past Default or Event of Default and its consequences for that series specified in the terms thereof, except (a) a Default or Event of Default in the payment of the principal of, and premium, if any, or interest on, any of the Debt Securities or in the payment of any related Coupon and (b) a Default or Event of Default in respect of a provision that under Section 9.02 cannot be amended without the consent of each Holder affected thereby. In case of any such waiver, such Default shall cease to exist, any Event of Default arising therefrom shall be deemed to have been cured for every purpose of this Indenture, and the Company, the Trustee and the Holders of the Debt Securities of that series shall be restored to their former positions and rights hereunder, respectively; but no such waiver shall extend to any subsequent or other Default or Event of Default or impair any right consequent thereon.

     Section 6.07 Trustee to Give Notice of Events of Default Known to It, but May Withhold Such Notice in Certain Circumstances. The Trustee shall, within 90 days after the occurrence of an Event of Default, or if later, within 30 days after the Trustee obtains actual knowledge of the Event of Default, with respect to a series of Debt Securities or Coupons, if any, give to the Holders thereof, in the manner provided in Section 13.03, notice of all Events of Default with respect to such series known to the Trustee, unless such Events of Default shall have been cured or waived before the giving of such notice; provided, that, except in the case of an Event of Default in the payment of the principal of, or premium, if any, or interest on, any of the Debt Securities or Coupons of such series or in the making of any sinking fund payment with respect to the Debt Securities of such series, the Trustee shall be protected in

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withholding such notice if and so long as the board of directors, the executive committee or a committee of directors or responsible officers of the Trustee in good faith determines that the withholding of such notice is in the interests of the Holders thereof.

     Section 6.08 Requirement of an Undertaking to Pay Costs in Certain Suits under the Indenture or Against the Trustee. All parties to this Indenture agree, and each Holder of any Debt Security or Coupon by his acceptance thereof shall be deemed to have agreed, that any court may in its discretion require, in any suit for the enforcement of any right or remedy under this Indenture, or in any suit against the Trustee for any action taken or omitted by it as Trustee, the filing by any party litigant in such suit of an undertaking to pay the costs of such suit in the manner and to the extent provided in the Trust Indenture Act, and that such court may in its discretion assess reasonable costs, including reasonable attorneys’ fees and expenses, against any party litigant in such suit, having due regard to the merits and good faith of the claims or defenses made by such party litigant; but the provisions of this Section 6.08 shall not apply to any suit instituted by the Trustee, to any suit instituted by any Holder, or group of Holders, holding in the aggregate more than 10 percent in principal amount of the Outstanding Debt Securities of that series or to any suit instituted by any Holder for the enforcement of the payment of the principal of, or premium, if any, or interest on, any Debt Security or Coupon on or after the due date for such payment expressed in such Debt Security or Coupon.

ARTICLE VII
CONCERNING THE TRUSTEE

     Section 7.01 Certain Duties and Responsibilities. The Trustee, prior to the occurrence of an Event of Default and after the curing or waiving of all Events of Default which may have occurred, undertakes to perform such duties and only such duties as are specifically set forth in this Indenture. In case an Event of Default has occurred (which has not been cured or waived), the Trustee shall exercise such of the rights and powers vested in it by this Indenture, and use the same degree of care and skill in their exercise, as a prudent man would exercise or use under the circumstances in the conduct of his own affairs.

     No provision of this Indenture shall be construed to relieve the Trustee from liability for its own negligent action, its own negligent failure to act, its own bad faith or its own willful misconduct, except that:

     (a) this paragraph shall not be construed to limit the effect of the first paragraph of this Section 7.01;

     (b) prior to the occurrence of an Event of Default with respect to the Debt Securities of a series and after the curing or waiving of all Events of Default with respect to such series which may have occurred:

     (i) the duties and obligations of the Trustee with respect to Debt Securities and Coupons, if any, of any series shall be determined solely by the express provisions of this Indenture, and the Trustee shall not be liable except for the performance of such duties and obligations with respect to such series as are specifically set forth in this Indenture, and no implied covenants or obligations with respect to such series shall be read into this Indenture against the Trustee; and

     (ii) in the absence of bad faith on the part of the Trustee, the Trustee may conclusively rely, as to the truth of the statements and the correctness of the opinions expressed therein, upon any certificates or opinions furnished to the Trustee and conforming to the requirements of this Indenture; but in the case of any such certificates or opinions which by any provision hereof are specifically required to be furnished to the Trustee, the Trustee shall be under a duty to examine the same to determine whether or not they conform to the requirements of this Indenture; but the Trustee shall examine the evidence furnished to it pursuant to Sections 4.05 and 4.07 to determine whether or not such evidence conforms to the requirement of this Indenture;

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     (iii) the Trustee shall not be liable for an error of judgment made in good faith by a responsible officer, unless it shall be proved that the Trustee was negligent in ascertaining the pertinent facts; and

     (iv) the Trustee shall not be liable with respect to any action taken or omitted to be taken by it with respect to Debt Securities of any series in good faith in accordance with the direction of the Holders of not less than a majority in aggregate principal amount of the Outstanding Debt Securities of that series relating to the time, method and place of conducting any proceeding for any remedy available to the Trustee, or exercising any trust or power conferred upon the Trustee, under this Indenture with respect to Debt Securities of such series.

     None of the provisions of this Indenture shall require the Trustee to expend or risk its own funds or otherwise incur any personal financial liability in the performance of any of its duties hereunder, or in the exercise of any of its rights or powers, if there shall be reasonable grounds for believing that repayment of such funds or adequate security or indemnity against such risk or liability is not reasonably assured to it.

     Whether or not therein expressly so provided, every provision of this Indenture relating to the conduct or affecting the liability of or affording protection to the Trustee shall be subject to the provisions of this Section.

     Section 7.02 Certain Rights of Trustee. Except as otherwise provided in Section 7.01:

     (a) the Trustee may rely and shall be protected in acting or refraining from acting upon any resolution, certificate, statement, instrument, opinion, report, notice, request, direction, consent, order, bond, debenture, note or other paper or document (whether in its original or facsimile form) believed by it to be genuine and to have been signed or presented by the proper party or parties;

     (b) any request, direction, order or demand of the Company mentioned herein shall be sufficiently evidenced by a Company Order (unless other evidence in respect thereof be herein specifically prescribed); and any resolution of the Board of Directors may be evidenced to the Trustee by a copy thereof certified by the Secretary or an Assistant Secretary of the Company;

     (c) the Trustee may consult with counsel of its selection, and the advice of such counsel or any Opinion of Counsel shall be full and complete authorization and protection in respect of any action taken or suffered or omitted by it hereunder in good faith and in accordance with such advice or Opinion of Counsel;

     (d) the Trustee shall be under no obligation to exercise any of the rights or powers vested in it by this Indenture at the request, order or direction of any of the Holders of Debt Securities or Coupons of any series pursuant to the provisions of this Indenture, unless such Holders shall have offered to the Trustee reasonable security or indemnity against the costs, expenses and liabilities which may be Incurred therein or thereby;

     (e) the Trustee shall not be liable for any action taken or omitted by it in good faith and reasonably believed by it to be authorized or within the discretion or rights or powers conferred upon it by this Indenture;

     (f) prior to the occurrence of an Event of Default and after the curing of all Events of Default which may have occurred, the Trustee shall not be bound to make any investigation into the facts or matters stated in any resolution, certificate, statement, instrument, opinion, report, notice, request, direction, consent, order, approval or other paper or document, unless requested in writing to do so by the Holders of not less than a majority in aggregate principal amount of the then Outstanding Debt Securities of a series affected by such matter; provided, however, that if the payment within a reasonable time to the Trustee of the costs, expenses or liabilities likely to be Incurred by it in the making of such investigation is not, in the opinion of the Trustee, reasonably assured to the Trustee by the security afforded to it by the

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terms of this Indenture, the Trustee may require reasonable indemnity against such costs, expenses or liabilities as a condition to so proceeding, and the reasonable expense of every such investigation shall be paid by the Company or, if paid by the Trustee, shall be repaid by the Company upon demand;

     (g) the Trustee may execute any of the trusts or powers hereunder or perform any duties hereunder either directly or by or through agents or attorneys and the Trustee shall not be responsible for any misconduct or negligence on the part of any agent or attorney appointed by it with due care hereunder; and

     (h) if any property other than cash shall at any time be subject to a Lien in favor of the Holders, the Trustee, if and to the extent authorized by a receivership or bankruptcy court of competent jurisdiction or by the supplemental instrument subjecting such property to such Lien, shall be entitled to make advances for the purpose of preserving such property or of discharging tax Liens or other prior Liens or encumbrances thereon.

     Section 7.03 Trustee Not Liable for Recitals in Indenture or in Debt Securities. The recitals contained herein, in the Debt Securities (except the Trustee’s certificate of authentication) and in any Coupons shall be taken as the statements of the Company, and the Trustee assumes no responsibility for the correctness of the same. The Trustee makes no representations as to the validity or sufficiency of this Indenture or of the Debt Securities or Coupons, if any, of any series, except that the Trustee represents that it is duly authorized to execute and deliver this Indenture, authenticate the Debt Securities and perform its obligations hereunder, and that the statements made by it or to be made by it in a Statement of Eligibility and Qualification on Form T-1 supplied to the Company are true and accurate. The Trustee shall not be accountable for the use or application by the Company of any of the Debt Securities or of the proceeds thereof.

     Section 7.04 Trustee, Paying Agent or Registrar May Own Debt Securities. The Trustee or any paying agent or Registrar, in its individual or any other capacity, may become the owner or pledgee of Debt Securities or Coupons and subject to the provisions of the Trust Indenture Act relating to conflicts of interest and preferential claims may otherwise deal with the Company with the same rights it would have if it were not Trustee, paying agent or Registrar.

     Section 7.05 Money Received by Trustee to be Held in Trust. Subject to the provisions of Section 11.05, all money received by the Trustee shall, until used or applied as herein provided, be held in trust for the purposes for which they were received, but need not be segregated from other funds except to the extent required by law. The Trustee shall be under no liability for interest on any money received by it hereunder. So long as no Event of Default shall have occurred and be continuing, all interest allowed on any such money shall be paid from time to time to the Company upon a Company Order.

     Section 7.06 Compensation and Reimbursement. The Company covenants and agrees to pay in Dollars to the Trustee from time to time, and the Trustee shall be entitled to, reasonable compensation for all services rendered by it hereunder (which shall not be limited by any provision of law in regard to the compensation of a trustee of an express trust), and, except as otherwise expressly provided herein, the Company will pay or reimburse in Dollars the Trustee upon its request for all reasonable expenses, disbursements and advances Incurred or made by the Trustee in accordance with any of the provisions of this Indenture (including the reasonable compensation and the expenses and disbursements of its agents, attorneys and counsel and of all Persons not regularly in its employ), including Section 6.02, except any such expense, disbursement or advances as may arise from its negligence, willful misconduct or bad faith. The Company also covenants to indemnify in Dollars the Trustee and any predecessor Trustee for, and to hold it harmless against, any and all loss, liability, claim, damage or expense Incurred without negligence, willful misconduct or bad faith on the part of the Trustee, arising out of or in connection with the acceptance or administration of this trust or trusts hereunder, including the reasonable costs and expenses of defending itself against any claim of liability in connection with the exercise or performance of any of its powers or duties hereunder. The obligations of the Company under this Section 7.06 to compensate

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and indemnify the Trustee and to pay or reimburse the Trustee for expenses, disbursements and advances shall constitute additional indebtedness hereunder and shall survive the satisfaction and discharge of this Indenture. The Company and the Holders agree that such additional indebtedness shall be secured by a Lien prior to that of the Debt Securities and Coupons, if any, upon all property and funds held or collected by the Trustee, as such, except funds held in trust for the payment of principal of, and premium, if any, or interest on, particular Debt Securities and Coupons.

     When the Trustee incurs expenses or renders services after an Event of Default specified in Section 6.01(g) or (h) occurs, the expenses and the compensation for the services are intended to constitute expenses of administration under any bankruptcy, insolvency, reorganization or other similar law.

     Section 7.07 Right of Trustee to Rely on an Officers’ Certificate Where No Other Evidence Specifically Prescribed. Except as otherwise provided in Section 7.01, whenever in the administration of the provisions of this Indenture the Trustee shall deem it necessary or desirable that a matter be proved or established prior to taking or suffering or omitting any action hereunder, such matter (unless other evidence in respect thereof be herein specifically prescribed) may, in the absence of negligence or bad faith on the part of the Trustee, be deemed to be conclusively proved and established by an Officers’ Certificate delivered to the Trustee and such certificate, in the absence of negligence or bad faith on the part of the Trustee, shall be full warrant to the Trustee for any action taken, suffered or omitted by it under the provisions of this Indenture upon the faith thereof.

     Section 7.08 Separate Trustee; Replacement of Trustee. The Company may, but need not, appoint a separate Trustee for any one or more series of Debt Securities. The Trustee may resign with respect to one or more or all series of Debt Securities at any time by giving notice to the Company. The Holders of not less than a majority in aggregate principal amount of the Debt Securities of a particular series may remove the Trustee for such series and only such series by so notifying the Trustee and may appoint a successor Trustee. The Company shall remove the Trustee if:

     (a) the Trustee fails to comply with Section 7.10;

     (b) the Trustee is adjudged bankrupt or insolvent;

     (c) a receiver or other public officer takes charge of the Trustee or its property; or

     (d) the Trustee otherwise becomes incapable of acting.

     If the Trustee resigns, is removed by the Company or by the Holders of a majority in aggregate principal amount of the Debt Securities of a particular series and such Holders do not reasonably promptly appoint a successor Trustee, or if a vacancy exists in the office of Trustee for any reason (the Trustee in such event being referred to herein as the retiring Trustee), the Company shall promptly appoint a successor Trustee. No resignation or removal of the Trustee and no appointment of a successor Trustee shall become effective until the acceptance of appointment by the successor Trustee in accordance with the applicable requirements of this Section 7.08.

     A successor Trustee shall deliver a written acceptance of its appointment to the retiring Trustee and to the Company. Thereupon the resignation or removal of the retiring Trustee shall become effective, and the successor Trustee shall have all the rights, powers and duties of the Trustee under this Indenture. The successor Trustee shall mail a notice of its succession to Holders of Debt Securities of each applicable series. The retiring Trustee shall promptly transfer all property held by it as Trustee to the successor Trustee, subject to the Lien provided for in Section 7.06.

     If a successor Trustee does not take office within 60 days after the retiring Trustee gives notice of resignation or is removed, the retiring Trustee or the Holders of not less than 25% in aggregate principal amount of the Debt Securities of any applicable series may petition any court of competent jurisdiction for the appointment of a successor Trustee for the Debt Securities of such series.

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     If the Trustee fails to comply with Section 7.10, any Holder of Debt Securities of any applicable series may petition any court of competent jurisdiction for the removal of the Trustee and the appointment of a successor Trustee for the Debt Securities of such series.

     Notwithstanding the replacement of the Trustee pursuant to this Section 7.08, the Company’s obligations under Section 7.06 shall continue for the benefit of the retiring Trustee.

     In the case of the appointment hereunder of a separate or successor trustee with respect to the Debt Securities of one or more series, the Company, any retiring Trustee and each successor or separate Trustee with respect to the Debt Securities of any applicable series shall execute and deliver an indenture supplemental hereto (i) which shall contain such provisions as shall be deemed necessary or desirable to confirm that all the rights, powers, trusts and duties of any retiring Trustee with respect to the Debt Securities of any series as to which any such retiring Trustee is not retiring shall continue to be vested in such retiring Trustee and (ii) that shall add to or change any of the provisions of this Indenture as shall be necessary to provide for or facilitate the administration of the trusts hereunder by more than one trustee, it being understood that nothing herein or in such supplemental indenture shall constitute such Trustees co-trustees of the same trust and that each such separate, retiring or successor Trustee shall be Trustee of a trust or trusts hereunder separate and apart from any trust or trusts hereunder administered by any other such Trustee.

     Section 7.09 Successor Trustee by Merger. If the Trustee consolidates with, merges or converts into, or transfers all or substantially all its corporate trust business or assets to, another corporation or banking association, the resulting, surviving or transferee corporation or banking association without any further act shall be the successor Trustee.

     In case at the time such successor or successors to the Trustee by merger, conversion, consolidation or transfer shall succeed to the trusts created by this Indenture any of the Debt Securities shall have been authenticated but not delivered, any such successor to the Trustee may adopt the certificate of authentication of any predecessor Trustee, and deliver such Debt Securities so authenticated; and in case at that time any of the Debt Securities shall not have been authenticated, any successor to the Trustee may authenticate such Debt Securities either in the name of any predecessor hereunder or in the name of the successor to the Trustee; and in all such cases such certificates shall have the full force which it is anywhere in the Debt Securities or in this Indenture provided that the certificate of the Trustee shall have.

     Section 7.10 Eligibility; Disqualification. The Trustee shall at all times satisfy the requirements of Section 310(a) of the Trust Indenture Act. The Trustee shall have a combined capital and surplus of at least $50,000,000 as set forth in its most recent published annual report of condition. No obligor upon the Debt Securities or Coupons, if any, of a particular series or Person directly or indirectly controlling, controlled by or under common control with such obligor shall serve as Trustee for the Debt Securities and Coupons of such series. The Trustee shall comply with Section 310(b) of the Trust Indenture Act; provided, however, that there shall be excluded from the operation of Section 310(b)(1) of the Trust Indenture Act this Indenture or any indenture or indentures under which other securities or certificates of interest or participation in other securities of the Company are outstanding if the requirements for such exclusion set forth in Section 310(b)(1) of the Trust Indenture Act are met.

     Section 7.11 Preferential Collection of Claims Against Company. The Trustee shall comply with Section 311(a) of the Trust Indenture Act, excluding any creditor relationship listed in Section 311(b) of the Trust Indenture Act. A Trustee who has resigned or been removed shall be subject to Section 311(a) of the Trust Indenture Act to the extent indicated therein.

     Section 7.12 Compliance with Tax Laws. The Trustee hereby agrees to comply with all U.S. Federal income tax information reporting and withholding requirements applicable to it with respect to

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payments of premium (if any) and interest on the Debt Securities, whether acting as Trustee, Security Registrar, paying agent or otherwise with respect to the Debt Securities.

ARTICLE VIII
CONCERNING THE HOLDERS

     Section 8.01 Evidence of Action by Holders. Whenever in this Indenture it is provided that the Holders of a specified percentage in aggregate principal amount of the Debt Securities of any or all series may take action (including the making of any demand or request, the giving of any direction, notice, consent or waiver or the taking of any other action) the fact that at the time of taking any such action the Holders of such specified percentage have joined therein may be evidenced (a) by any instrument or any number of instruments of similar tenor executed by Holders in Person or by agent or proxy appointed in writing, (b) by the record of the Holders voting in favor thereof at any meeting of Holders duly called and held in accordance with the provisions of Section 5.02, (c) by a combination of such instrument or instruments and any such record of such a meeting of Holders, or (d) in the case of Debt Securities evidenced by a Global Security, by any electronic transmission or other message, whether or not in written format, that complies with the Depositary’s applicable procedures.

     Section 8.02 Proof of Execution of Instruments and of Holding of Debt Securities. Subject to the provisions of Section 7.01, Section 7.02 and Section 13.09, proof of the execution of any instrument by a Holder or his agent or proxy shall be sufficient if made in accordance with such reasonable rules and regulations as may be prescribed by the Trustee or in such manner as shall be satisfactory to the Trustee.

     The ownership of Registered Securities of any series shall be proved by the Debt Security Register or by a certificate of the Registrar for such series.

     The ownership of Bearer Securities shall be proved by production of such Bearer Securities or by a certificate executed by any bank or trust company, which certificate shall be dated and shall state on the date thereof a Bearer Security bearing a specified identifying number or other mark was deposited with or exhibited to the Person executing such certificate by the Person named in such certificate, or by any other proof of possession reasonably satisfactory to the Trustee. The holding by the Person named in any such certificate of any Bearer Security specified therein shall be presumed to continue for a period of one year unless at the time of determination of such holding (a) another certificate bearing a later date issued in respect of the same Bearer Security shall be produced, (b) such Bearer Security shall be produced by some other Person, (c) such Bearer Security shall have been registered on the Debt Security Register, if, pursuant to Section 2.03, such Bearer Security can be so registered, or (d) such Bearer Security shall have been canceled or paid.

     The Trustee may require such additional proof of any matter referred to in this Section 8.02 as it shall deem necessary.

     Section 8.03 Who May be Deemed Owner of Debt Securities. Prior to due presentment for registration of transfer of any Registered Security, the Company, the Trustee, any paying agent and any Registrar may deem and treat the Person in whose name any Registered Security shall be registered upon the books of the Company as the absolute owner of such Registered Security (whether or not such Registered Security shall be overdue and notwithstanding any notation of ownership or other writing thereon) for the purpose of receiving payment of or on account of the principal of and premium, if any, and (subject to Section 2.12) interest on such Registered Security and for all other purposes, and neither the Company nor the Trustee nor any paying agent nor any Registrar shall be affected by any notice to the contrary; and all such payments so made to any such Holder for the time being, or upon his order, shall be valid and, to the extent of the sum or sums so paid, effectual to satisfy and discharge the liability for money payable upon any such Registered Security.

     The Company, the Trustee and any paying agent may deem and treat the Holder of any Bearer Security or Coupon as the absolute owner of such Bearer Security or Coupon (whether or not such Debt

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Security shall be overdue and notwithstanding any notation of ownership or other writing thereon) for the purpose of receiving payment of or on account of the principal of and premium, if any, and (subject to Section 2.12) interest on such Bearer Security or Coupon and for all other purposes, and neither the Company nor the Trustee nor any paying agent shall be affected by any notice to the contrary; and all such payments so made to any such Holder for the time being, or upon his order, shall be valid and, to the extent of the sum or sums so paid, effectual to satisfy and discharge the liability for money payable upon any such Bearer Security or Coupon.

     None of the Company, the Trustee, any paying agent or the Registrar will have any responsibility or liability for any aspect of the records relating to or payments made on account of beneficial ownership interests in a Global Security or for maintaining, supervising or reviewing any records relating to such beneficial ownership interests.

     Section 8.04 Instruments Executed by Holders Bind Future Holders. At any time prior to (but not after) the evidencing to the Trustee, as provided in Section 8.01, of the taking of any action by the Holders of the percentage in aggregate principal amount of the Debt Securities of any series specified in this Indenture in connection with such action and subject to the following paragraph, any Holder of a Debt Security which is shown by the evidence to be included in the Debt Securities the Holders of which have consented to such action may, by filing written notice with the Trustee at its corporate trust office referred to in Section 13.03 and upon proof of holding as provided in Section 8.02, revoke such action so far as concerns such Debt Security. Except as aforesaid any such action taken by the Holder of any Debt Security shall be conclusive and binding upon such Holder and upon all future Holders and owners of such Debt Security and all past, present and future Holders of Coupons, if any, appertaining thereto, and of any Debt Security issued upon transfer thereof or in exchange or substitution therefor, irrespective of whether or not any notation in regard thereto is made upon such Debt Security or such other Debt Securities or Coupons. Any action taken by the Holders of the percentage in aggregate principal amount of the Debt Securities of any series specified in this Indenture in connection with such action shall be conclusively binding upon the Company, the Trustee and the Holders of all the Debt Securities and Coupons of such series.

     The Company may, but shall not be obligated to, fix a record date for the purpose of determining the Holders of Registered Securities entitled to give their consent or take any other action required or permitted to be taken pursuant to this Indenture. If a record date is fixed, then notwithstanding the immediately preceding paragraph, those Persons who were Holders of Registered Securities at such record date (or their duly designated proxies), and only those Persons, shall be entitled to give such consent or to revoke any consent previously given or to take any such action, whether or not such Persons continue to be Holders of Registered Securities after such record date. No such consent shall be valid or effective for more than 120 days after such record date unless the consent of the Holders of the percentage in aggregate principal amount of the Debt Securities of such series specified in this Indenture shall have been received within such 120-day period.

ARTICLE IX
SUPPLEMENTAL INDENTURES

     Section 9.01 Purposes for Which Supplemental Indenture May be Entered into Without Consent of Holders. The Company, when authorized by a resolution of the Board of Directors, and the Trustee may from time to time and at any time, without the consent of Holders, enter into an indenture or indentures supplemental hereto (which shall conform to the provisions of the Trust Indenture Act as in force at the date of the execution thereof) for one or more of the following purposes:

     (a) to evidence the succession pursuant to Article X of another Person to the Company, or successive successions, and the assumption by the Successor Company (as defined in Section 10.01) of the covenants, agreements and obligations of the Company in this Indenture and in the Debt Securities;

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     (b) to surrender any right or power herein conferred upon the Company, to limit the applicability of or consequences of breach of any covenant under the Indenture, to add to the covenants of the Company such further covenants, restrictions, conditions or provisions for the protection of the Holders of all or any series of Debt Securities and the Coupons, if any, appertaining thereto (and if such covenants are to be for the benefit of less than all series of Debt Securities, stating that such covenants are expressly being included solely for the benefit of such series) as the Board of Directors shall consider to be for the protection of the Holders of such Debt Securities, and to make the occurrence, or the occurrence and continuance, of a Default in any of such additional covenants, restrictions, conditions or provisions a Default or an Event of Default permitting the enforcement of all or any of the several remedies provided in this Indenture; provided, that in respect of any such additional covenant, restriction, condition or provision such supplemental indenture may provide for a particular period of grace after Default (which period may be shorter or longer than that allowed in the case of other Defaults) or may provide for an immediate enforcement upon such Default or may limit the remedies available to the Trustee upon such Default or may limit the right of the Holders of a majority in aggregate principal amount of any or all series of Debt Securities to waive such default;

     (c) to cure any ambiguity or omission or to correct or supplement any provision contained herein, in any supplemental indenture or in any Debt Securities of any series that may be defective or inconsistent with any other provision contained herein, in any supplemental indenture or in the Debt Securities of such series; to convey, transfer, assign, mortgage or pledge any property to or with the Trustee;

     (d) to modify or amend this Indenture in such a manner as to permit the qualification of this Indenture or any indenture supplemental hereto under the Trust Indenture Act as then in effect, except that nothing herein contained shall permit or authorize the inclusion in any indenture supplemental hereto of the provisions referred to in Section 316(a)(2) of the Trust Indenture Act;

     (e) to add to or change any of the provisions of this Indenture to provide that Bearer Securities may be registerable as to principal, to change or eliminate any restrictions on the payment of principal of, or premium, if any, on, Registered Securities or of principal of, or premium, if any, or interest on, Bearer Securities or to permit Registered Securities to be exchanged for Bearer Securities; provided, that any such action shall not adversely affect the interests of the Holders of Debt Securities or any Coupons of any series in any material respect or permit or facilitate the issuance of Debt Securities of any series in uncertificated form;

     (f) to comply with Article X;

     (g) in the case of any Debt Securities and Coupons, if any, appertaining thereto subordinated pursuant to Article XII, to make any change in Article XII that would limit or terminate the benefits available to any holder of Senior Indebtedness (or Representatives therefor) under Article XII;

     (h) to add Guarantees with respect to any or all of the Debt Securities or to secure any or all of the Debt Securities;

     (i) to make any change that does not adversely affect the rights hereunder of any Holder;

     (j) to add to, change or eliminate any of the provisions of this Indenture in respect of one or more series of Debt Securities; provided, however, that any such addition, change or elimination not otherwise permitted under this Section 9.01 shall (i) neither (A) apply to any Debt Security of any series created prior to the execution of such supplemental indenture and entitled to the benefit of such provision nor (B) modify the rights of the Holder of any such Debt Security with respect to such provision or (ii) shall become effective only when there is no such Debt Security Outstanding;

     (k) to evidence and provide for the acceptance of appointment hereunder by a successor or separate Trustee with respect to the Debt Securities of one or more series and to add to or change any of

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the provisions of this Indenture as shall be necessary to provide for or facilitate the administration of the trusts hereunder by more than one Trustee;

     (l) to establish the form or terms of Debt Securities and Coupons, if any, of any series as permitted by Sections 2.01 and 2.03; and

     (m) to provide for uncertificated Debt Securities in addition to or in place of certificated Debt Securities (provided that the uncertificated Debt Securities are issued in registered form for purposes of Section 163(f) of the Internal Revenue Code of 1986, as amended, or in a manner such that the uncertificated Debt Securities are described in Section 163(f)(2)(B) of the Internal Revenue Code of 1986, as amended).

     The Trustee is hereby authorized to join with the Company in the execution of any such supplemental indenture, to make any further appropriate agreements and stipulations which may be therein contained and to accept the conveyance, transfer, assignment, mortgage or pledge of any property thereunder, but the Trustee shall not be obligated to enter into any such supplemental indenture which affects the Trustee’s own rights, duties or immunities under this Indenture or otherwise.

     Any supplemental indenture authorized by the provisions of this Section 9.01 may be executed by the Company and the Trustee without the consent of the Holders of any of the Debt Securities or Coupons, if any, appertaining thereto at the time Outstanding, notwithstanding any of the provisions of Section 9.02.

     In the case of Debt Securities or Coupons, if any, appertaining thereto subordinated pursuant to Article XII, an amendment under this Section 9.01 may not make any change that adversely affects the rights under Article XII of any holder of Senior Indebtedness then outstanding unless the holders of such Senior Indebtedness (or any group or Representative thereof authorized to give a consent) consent to such change.

     The failure to give such notice to all such Holders, or any defect therein, shall not impair or affect the validity of an amendment under this Section 9.01.

     Section 9.02 Modification of Indenture with Consent of Holders of Debt Securities. Without notice to any Holder but with the consent (evidenced as provided in Section 8.01) of the Holders of not less than a majority in aggregate principal amount of the Outstanding Debt Securities of each series affected by such supplemental indenture (including consents obtained in connection with a tender offer or exchange offer for any such series of Debt Securities), the Company, when authorized by a resolution of the Board of Directors, and the Trustee may from time to time and at any time enter into an indenture or indentures supplemental hereto (which shall conform to the provisions of the Trust Indenture Act as in force at the date of execution thereof) for the purpose of adding any provisions to or changing in any manner or eliminating any of the provisions of this Indenture or of any supplemental indenture or of modifying in any manner the rights of the Holders of the Debt Securities of such series; provided, that no such supplemental indenture, without the consent of the Holders of each Debt Security so affected, shall (a) reduce the percentage in principal amount of Debt Securities of any series whose Holders must consent to an amendment or waiver; (b) reduce the rate of or extend the time for payment of interest on any Debt Security or Coupon or reduce the amount of any payment to be made with respect to any Coupon; (c) reduce the principal of or extend the Stated Maturity of any Debt Security; (d) reduce any premium payable upon the redemption of any Debt Security or change the time at which any Debt Security may or shall be redeemed in accordance with Article III; (e) make any Debt Security or Coupon payable in Currency other than that stated in such Debt Security; (f) in the case of any Debt Security or Coupons, if any, appertaining thereto subordinated pursuant to Article XII, make any change in Article XII that adversely affects the rights of any Holder under Article XII; (g) release any security that may have been granted in respect of the Debt Securities, other than in accordance with this Indenture; (h) impair the right of any Holder to receive payment of principal of, premium, if any, and interest on

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such Holder’s Debt Securities on or after the due dates therefor; (i) make any change in Section 6.06 or this Section 9.02; (j) change any obligation of the Company to pay additional interest pursuant to Section 4.06; or (k) limit the obligation of the Company to maintain a paying agency outside the United States for payment on Bearer Securities as provided in Section 4.02 or limit the obligation of the Company to redeem a Bearer Security as provided in Section 3.02(b).

     A supplemental indenture which changes or eliminates any covenant or other provision of this Indenture which has been expressly included solely for the benefit of one or more particular series of Debt Securities and Coupons, if any, or which modifies the rights of the Holders of Debt Securities and Coupons of such series with respect to such covenant or other provision, shall be deemed not to affect the rights under this Indenture of the Holders of Debt Securities and Coupons, if any, of any other series.

     Upon the request of the Company, accompanied by a copy of a resolution of the Board of Directors authorizing the execution of any such supplemental indenture, and upon the filing with the Trustee of evidence of the consent of Holders as aforesaid, the Trustee shall join with the Company in the execution of such supplemental indenture unless such supplemental indenture affects the Trustee’s own rights, duties or immunities under this Indenture or otherwise, in which case the Trustee may in its discretion but shall not be obligated to enter into such supplemental indenture.

     It shall not be necessary for the consent of the Holders under this Section 9.02 to approve the particular form of any proposed supplemental indenture, but it shall be sufficient if such consent shall approve the substance thereof.

     In the case of any Debt Securities or Coupons, if any, appertaining thereto, subordinated pursuant to Article XII, an amendment under this Section 9.02 may not make any change that adversely affects the rights under Article XII of any holder of Senior Indebtedness then outstanding unless the holders of such Senior Indebtedness (or any group or Representative thereof authorized to give a consent) consent to such change.

     After an amendment under this Section 9.02 becomes effective, the Company shall mail to Holders of that series of Debt Securities a notice briefly describing such amendment. The failure to give such notice to all such Holders, or any defect therein, shall not impair or affect the validity of an amendment under this Section 9.02.

     Section 9.03 Effect of Supplemental Indentures. Upon the execution of any supplemental indenture pursuant to the provisions of this Article IX, this Indenture shall be and be deemed to be modified and amended in accordance therewith and the respective rights, limitations of rights, obligations, duties and immunities under this Indenture of the Trustee, the Company and the Holders shall thereafter be determined, exercised and enforced hereunder subject in all respects to such modifications and amendments, and all the terms and conditions of any such supplemental indenture shall be and be deemed to be part of the terms and conditions of this Indenture for any and all purposes.

     The Trustee, subject to the provisions of Section 7.01 and Section 7.02, shall be entitled to receive an Officers’ Certificate and an Opinion of Counsel as conclusive evidence that any such supplemental indenture complies with the provisions of this Article IX.

     Section 9.04 Debt Securities May Bear Notation of Changes by Supplemental Indentures. Debt Securities and Coupons, if any, of any series authenticated and delivered after the execution of any supplemental indenture pursuant to the provisions of this Article IX may, and shall if required by the Trustee, bear a notation in form approved by the Trustee as to any matter provided for in such supplemental indenture. New Debt Securities and Coupons of any series so modified as to conform, in the opinion of the Trustee and the Board of Directors, to any modification of this Indenture contained in any such supplemental indenture may be prepared and executed by the Company, authenticated by the Trustee and delivered in exchange for the Debt Securities and Coupons of such series then Outstanding. Failure to

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make the appropriate notation or to issue a new Debt Security or Coupon of such series shall not affect the validity of such amendment.

ARTICLE X
CONSOLIDATION, MERGER, SALE OR CONVEYANCE

     Section 10.01 Consolidations and Mergers of the Company. The Company shall not consolidate with or merge with or into any Person, or convey, transfer or lease all or substantially all its assets, or permit any Person to consolidate with or merge into or convey, transfer or lease substantially all its assets to the Company, unless: (a) either (i) the Company shall be the surviving Person in the case of a merger or (ii) the resulting, surviving or transferee Person if other than the Company (the “Successor Company”) is organized and existing under the laws of the United States, any State thereof or the District of Columbia and the Successor Company shall expressly assume, by an indenture supplemental hereto, executed and delivered to the Trustee, in form satisfactory to the Trustee, all the obligations of the Company under this Indenture and the Debt Securities and Coupons, if any, according to their tenor; (b) immediately after giving effect to such transaction or series of transactions (and treating any Indebtedness which becomes an obligation of the Successor Company or any Subsidiary of the Company as a result of such transaction as having been Incurred by the Successor Company or such Subsidiary at the time of such transaction or series of transactions), no Default or Event of Default would occur or be continuing; (c) the Successor Company waives any right to redeem any Bearer Security under circumstances in which the Successor Company would be entitled to redeem such Bearer Security but the Company would not have been so entitled to redeem if the consolidation, merger, conveyance, transfer or lease had not occurred; and (d) the Company shall have delivered to the Trustee an Officers’ Certificate and an Opinion of Counsel, each stating that such consolidation, amalgamation, merger or disposition and such supplemental indenture (if any) comply with this Indenture.

     Section 10.02 Rights and Duties of Successor Corporation. In case of any consolidation, amalgamation or merger where the Company is not the continuing Person, or disposition of all or substantially all of the assets of the Company as an entirety in accordance with Section 10.01, the Successor Company shall succeed to and be substituted for the Company, with the same effect as if it had been named herein as the party of the first part, and the predecessor corporation shall be released from all liabilities and obligations under the Indenture and the Debt Securities. The Successor Company thereupon may cause to be signed, and may issue either in its own name or in the name of the Company, any or all the Debt Securities issuable hereunder which theretofore shall not have been signed by or on behalf of the Company and delivered to the Trustee; and, upon the order of the Successor Company, instead of the Company, and subject to all the terms, conditions and limitations in this Indenture prescribed, the Trustee shall authenticate and shall deliver any Debt Securities and Coupons, if any, appertaining thereto, which previously shall have been signed and delivered by or on behalf of the Company to the Trustee for authentication, and any Debt Securities and Coupons, if any, appertaining thereto, which the Successor Company thereafter shall cause to be signed and delivered to the Trustee for that purpose. All the Debt Securities and Coupons, if any, appertaining thereto so issued shall in all respects have the same legal rank and benefit under this Indenture as the Debt Securities and Coupons, if any, appertaining thereto theretofore or thereafter issued in accordance with the terms of this Indenture as though all such Debt Securities and Coupons had been issued at the date of the execution hereof.

     In case of any such consolidation, merger, amalgamation, sale or disposition such changes in phraseology and form (but not in substance) may be made in the Debt Securities and Coupons, if any, appertaining thereto thereafter to be issued as may be appropriate.

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ARTICLE XI
SATISFACTION AND DISCHARGE OF
INDENTURE; DEFEASANCE; UNCLAIMED MONEY

     Section 11.01 Applicability of Article. If, pursuant to Section 2.03, provision is made for the defeasance of Debt Securities of a series and if the Debt Securities of such series are Registered Securities and denominated and payable only in Dollars (except as provided pursuant to Section 2.03), then the provisions of this Article XI relating to defeasance of Debt Securities shall be applicable except as otherwise specified pursuant to Section 2.03 for Debt Securities of such series. Defeasance provisions, if any, for Debt Securities denominated in a Foreign Currency or for Bearer Securities may be specified pursuant to Section 2.03.

     Section 11.02 Satisfaction and Discharge of Indenture; Defeasance. (a) If at any time (i) the Company shall have delivered to the Trustee for cancellation all Debt Securities of any series theretofore authenticated and delivered (other than (A) Coupons appertaining to Bearer Securities of such series called for redemption and maturing after the relevant redemption date, surrender of which has been waived, (B) any Debt Securities and Coupons of such series which shall have been destroyed, lost or stolen and which shall have been replaced or paid as provided in Section 2.09 and (C) Debt Securities and Coupons for whose payment money has theretofore been deposited in trust and thereafter repaid to the Company as provided in Section 11.05) or (ii) all Debt Securities and the Coupons, if any, of such series not theretofore delivered to the Trustee for cancellation shall have become due and payable, or are by their terms to become due and payable within one year or are to be called for redemption within one year under arrangements satisfactory to the Trustee for the giving of notice of redemption, and the Company shall have deposited or caused to be deposited with the Trustee as trust funds the entire amount in the Currency in which such Debt Securities are denominated (except as otherwise provided pursuant to Section 2.03) sufficient to pay at final maturity or upon redemption all Debt Securities of such series not theretofore delivered to the Trustee for cancellation, including principal and premium, if any, and interest due or to become due on such date of maturity or redemption date, as the case may be, and if in either case the Company shall also have paid or caused to be paid all other sums payable hereunder by the Company with respect to the Debt Securities of such series, then this Indenture shall cease to be of further effect (except as provided in Section 11.02(c) and except as to any right to receive additional interest as provided in Section 4.06) with respect to the Debt Securities of such series, and the Trustee, on demand of the Company accompanied by an Officers’ Certificate and an Opinion of Counsel and at the cost and expense of the Company, shall execute proper instruments acknowledging satisfaction of and discharging this Indenture with respect to the Debt Securities of such series.

     (b) Subject to Sections 11.02(c), 11.03 and 11.07, the Company at any time may terminate, with respect to Debt Securities of a particular series, all its obligations under the Debt Securities of such series and this Indenture with respect to the Debt Securities of such series (“legal defeasance option”) or the operation of (x) Sections 4.09 and 4.10, (y) any covenant made applicable to such Debt Securities pursuant to Section 2.03, and (z) Sections 6.01(d), (e), (f) and (i) (“covenant defeasance option”). The Company may exercise its legal defeasance option notwithstanding its prior exercise of its covenant defeasance option.

     If the Company exercises its legal defeasance option, payment of the Debt Securities of the defeased series may not be accelerated because of an Event of Default. If the Company exercises its covenant defeasance option, payment of the Debt Securities of the defeased series may not be accelerated because of an Event of Default specified in Sections 6.01(d), (e), (f) and (i) (except to the extent covenants or agreements referenced in such Sections remain applicable).

     Upon satisfaction of the conditions set forth herein and upon request of the Company, the Trustee shall acknowledge in writing the discharge of those obligations that the Company terminates.

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     (c) Notwithstanding clauses (a) and (b) above, the Company’s obligations in Sections 2.07, 2.09, 4.02, 4.03, 4.04, 4.06, the last sentence of 4.07(a), 5.01, 7.06, 7.10, 11.05, 11.06 and 11.07 shall survive until the Debt Securities of the defeased series have been paid in full. Thereafter, the Company’s obligations in Sections 7.06, 11.05 and 11.06 shall survive.

     Section 11.03 Conditions of Defeasance. The Company may exercise its legal defeasance option or its covenant defeasance option with respect to Debt Securities of a particular series only if:

     (a) the Company irrevocably deposits in trust with the Trustee money or U.S. Government Obligations for the payment of principal of, and premium, if any, and interest on, the Debt Securities of such series to Stated Maturity or redemption, as the case may be;

     (b) the Company delivers to the Trustee a certificate from a nationally recognized firm of independent accountants expressing their opinion that the payments of principal and interest when due and without reinvestment on the deposited U.S. Government Obligations plus any deposited money without investment will provide cash at such times and in such amounts as will be sufficient to pay the principal, premium, if any, and interest when due on all the Debt Securities of such series to final maturity or redemption, as the case may be;

     (c) 91 days pass after the deposit is made and during the 91-day period no Default specified in Section 6.01(g) or (h) with respect to the Company occurs which is continuing at the end of the period;

     (d) no Default has occurred and is continuing on the date of such deposit and after giving effect thereto;

     (e) the deposit does not constitute a default under any other material agreement binding on the Company and, if the Debt Securities of such series are subordinated pursuant to Article XII, is not prohibited by Article XII;

     (f) the Company delivers to the Trustee an Opinion of Counsel to the effect that the trust resulting from the deposit does not constitute, or is qualified as, a regulated investment company under the Investment Company Act of 1940;

     (g) in the event of the legal defeasance option, the Company shall have delivered to the Trustee an Opinion of Counsel stating that (i) the Company has received from the Internal Revenue Service a ruling, or (ii) since the date of this Indenture there has been a change in the applicable Federal income tax law, in either case to the effect that, and based thereon such Opinion of Counsel shall confirm that, the Holders of Debt Securities of such series will not recognize income, gain or loss for Federal income tax purposes as a result of such defeasance and will be subject to Federal income tax on the same amounts, in the same manner and at the same times as would have been the case if such defeasance had not occurred;

     (h) in the event of the covenant defeasance option, the Company shall have delivered to the Trustee an Opinion of Counsel to the effect that the Holders of Debt Securities of such series will not recognize income, gain or loss for Federal income tax purposes as a result of such covenant defeasance and will be subject to Federal income tax on the same amounts, in the same manner and at the same times as would have been the case if such covenant defeasance had not occurred; and

     (i) the Company delivers to the Trustee an Officers’ Certificate and an Opinion of Counsel, each stating that all conditions precedent to the defeasance of the Debt Securities of such series as contemplated by this Article XI have been complied with.

     Before or after a deposit, the Company may make arrangements satisfactory to the Trustee for the redemption of Debt Securities of such series at a future date in accordance with Article III.

     Section 11.04 Application of Trust Money. The Trustee shall hold in trust money or U.S. Government Obligations deposited with it pursuant to this Article XI. It shall apply the deposited money and the money from U.S. Government Obligations through any paying agent and in accordance with this

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Indenture to the payment of principal of, and premium, if any, and interest on, the Debt Securities and Coupons, if any, of the defeased series. In the event the Debt Securities and Coupons, if any, of the defeased series are subordinated pursuant to Article XII, money and securities so held in trust are not subject to Article XII.

     Section 11.05 Repayment to Company. The Trustee and any paying agent shall promptly turn over to the Company upon request any excess money or securities held by them at any time.

     Subject to any applicable abandoned property law, the Trustee and any paying agent shall pay to the Company upon request any money held by them for the payment of principal, premium or interest that remains unclaimed for two years, and, thereafter, Holders entitled to such money must look to the Company for payment as general creditors.

     Section 11.06 Indemnity for U.S. Government Obligations. The Company shall pay and shall indemnify the Trustee and the Holders against any tax, fee or other charge imposed on or assessed against deposited U.S. Government Obligations or the principal and interest received on such U.S. Government Obligations.

     Section 11.07 Reinstatement. If the Trustee or any paying agent is unable to apply any money or U.S. Government Obligations in accordance with this Article XI by reason of any legal proceeding or by reason of any order or judgment of any court or government authority enjoining, restraining or otherwise prohibiting such application, the Company’s obligations under this Indenture and the Debt Securities of the defeased series shall be revived and reinstated as though no deposit had occurred pursuant to this Article XI until such time as the Trustee or any paying agent is permitted to apply all such money or U.S. Government Obligations in accordance with this Article XI.

ARTICLE XII
SUBORDINATION OF DEBT SECURITIES

     Section 12.01 Applicability of Article; Agreement to Subordinate. The provisions of this Article XII shall be applicable to the Debt Securities of any series (Debt Securities of such series referred to in this Article XII as “Subordinated Debt Securities”) designated, pursuant to Section 2.03, as subordinated to Senior Indebtedness. Each Holder by accepting a Subordinated Debt Security agrees that the Indebtedness evidenced by such Subordinated Debt Security is subordinated in right of payment, to the extent and in the manner provided in this Article XII, to the prior payment of all Senior Indebtedness and that the subordination is for the benefit of and enforceable by the holders of Senior Indebtedness. All provisions of this Article XII shall be subject to Section 12.12.

     Section 12.02 Liquidation, Dissolution, Bankruptcy. Upon any payment or distribution of the assets of the Company to creditors upon a total or partial liquidation or a total or partial dissolution of the Company or in a bankruptcy, reorganization, insolvency, receivership or similar proceeding relating to the Company or its property:

     (a) holders of Senior Indebtedness shall be entitled to receive payment in full in cash of the Senior Indebtedness (including interest (if any), accruing on or after the commencement of a proceeding in bankruptcy, whether or not allowed as a claim against the Company in such bankruptcy proceeding) before Holders of Subordinated Debt Securities shall be entitled to receive any payment of principal of, or premium, if any, or interest on, the Subordinated Debt Securities; and

     (b) until the Senior Indebtedness is paid in full, any distribution to which Holders of Subordinated Debt Securities would be entitled but for this Article XII shall be made to holders of Senior Indebtedness as their interests may appear, except that such Holders may receive shares of stock and any debt securities that are subordinated to Senior Indebtedness to at least the same extent as the Subordinated Debt Securities.

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     Section 12.03 Default on Senior Indebtedness. The Company may not pay the principal of, or premium, if any, or interest on, the Subordinated Debt Securities or make any deposit pursuant to Article XI and may not repurchase, redeem or otherwise retire (except, in the case of Subordinated Debt Securities that provide for a mandatory sinking fund pursuant to Section 3.05, by the delivery of Subordinated Debt Securities by the Company to the Trustee pursuant to the first paragraph of Section 3.06) any Debt Securities (collectively, “pay the Subordinated Debt Securities”) if (a) any principal, premium or interest in respect of Senior Indebtedness is not paid within any applicable grace period (including at maturity) or (b) any other default on Senior Indebtedness occurs and the maturity of such Senior Indebtedness is accelerated in accordance with its terms unless, in either case, (i) the default has been cured or waived and any such acceleration has been rescinded or (ii) such Senior Indebtedness has been paid in full in cash; provided, however, that the Company may pay the Subordinated Debt Securities without regard to the foregoing if the Company and the Trustee receive written notice approving such payment from the Representative of each issue of Designated Senior Indebtedness. During the continuance of any default (other than a default described in clause (a) or (b) of the preceding sentence) with respect to any Senior Indebtedness pursuant to which the maturity thereof may be accelerated immediately without further notice (except such notice as may be required to effect such acceleration) or the expiration of any applicable grace periods, the Company may not pay the Subordinated Debt Securities for a period (a “Payment Blockage Period”) commencing upon the receipt by the Company and the Trustee of written notice of such default from the Representative of any Designated Senior Indebtedness specifying an election to effect a Payment Blockage Period (a “Blockage Notice”) and ending 179 days thereafter (or earlier if such Payment Blockage Period is terminated (A) by written notice to the Trustee and the Company from the Person or Persons who gave such Blockage Notice, (B) by repayment in full in cash of such Designated Senior Indebtedness or (C) because the default giving rise to such Blockage Notice is no longer continuing). Notwithstanding the provisions described in the immediately preceding sentence (but subject to the provisions contained in the first sentence of this Section 12.03), unless the holders of such Designated Senior Indebtedness or the Representative of such holders shall have accelerated the maturity of such Designated Senior Indebtedness, the Company may resume payments on the Subordinated Debt Securities after such Payment Blockage Period. Not more than one Blockage Notice may be given in any consecutive 360-day period, irrespective of the number of defaults with respect to any number of issues of Senior Indebtedness during such period; provided, however, that if any Blockage Notice within such 360-day period is given by or on behalf of any holders of Designated Senior Indebtedness (other than the Bank Indebtedness), the Representative of the Bank Indebtedness may give another Blockage Notice within such period; provided, further, however, that in no event may the total number of days during which any Payment Blockage Period or Periods is in effect exceed 179 days in the aggregate during any consecutive 360-day period. For purposes of this Section 12.03, no default or event of default which existed or was continuing on the date of the commencement of any Payment Blockage Period with respect to the Senior Indebtedness initiating such Payment Blockage Period shall be, or be made, the basis of the commencement of a subsequent Payment Blockage Period by the Representative of such Senior Indebtedness, whether or not within a period of 360 consecutive days, unless such default or event of default shall have been cured or waived for a period of not less than 90 consecutive days.

     Section 12.04 Acceleration of Payment of Debt Securities. If payment of the Subordinated Debt Securities is accelerated because of an Event of Default, the Company or the Trustee shall promptly notify the holders of the Designated Senior Indebtedness (or their Representatives) of the acceleration.

     Section 12.05 When Distribution Must be Paid Over. If a distribution is made to Holders of Subordinated Debt Securities that because of this Article XII should not have been made to them, the Holders who receive such distribution shall hold it in trust for holders of Senior Indebtedness and pay it over to them as their interests may appear.

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     Section 12.06 Subrogation. After all Senior Indebtedness is paid in full and until the Subordinated Debt Securities are paid in full, Holders thereof shall be subrogated to the rights of holders of Senior Indebtedness to receive distributions applicable to Senior Indebtedness. A distribution made under this Article XII to holders of Senior Indebtedness which otherwise would have been made to Holders of Subordinated Debt Securities is not, as between the Company and such Holders, a payment by the Company on Senior Indebtedness.

     Section 12.07 Relative Rights. This Article XII defines the relative rights of Holders of Subordinated Debt Securities and holders of Senior Indebtedness. Nothing in this Indenture shall:

     (a) impair, as between the Company and Holders of either Subordinated Debt Securities or Debt Securities, the obligation of the Company, which is absolute and unconditional, to pay principal of, and premium, if any, and interest on, the Subordinated Debt Securities and the Debt Securities in accordance with their terms; or

     (b) prevent the Trustee or any Holder of either Subordinated Debt Securities or Debt Securities from exercising its available remedies upon a Default, subject to the rights of holders of Senior Indebtedness to receive distributions otherwise payable to Holders of Subordinated Debt Securities.

     Section 12.08 Subordination May Not be Impaired by Company. No right of any holder of Senior Indebtedness to enforce the subordination of the Indebtedness evidenced by the Subordinated Debt Securities shall be impaired by any act or failure to act by the Company or by its failure to comply with this Indenture.

     Section 12.09 Rights of Trustee and Paying Agent. Notwithstanding Section 12.03, the Trustee or any paying agent may continue to make payments on Subordinated Debt Securities and shall not be charged with knowledge of the existence of facts that would prohibit the making of any such payments unless, not less than two business days prior to the date of such payment, a responsible officer of the Trustee receives notice satisfactory to it that payments may not be made under this Article XII. The Company, the Registrar, any paying agent, a Representative or a holder of Senior Indebtedness may give the notice; provided, however, that, if an issue of Senior Indebtedness has a Representative, only the Representative may give the notice.

     The Trustee in its individual or any other capacity may hold Senior Indebtedness with the same rights it would have if it were not Trustee. The Registrar and any paying agent may do the same with like rights. The Trustee shall be entitled to all the rights set forth in this Article XII with respect to any Senior Indebtedness which may at any time be held by it, to the same extent as any other holder of Senior Indebtedness; and nothing in Article VII shall deprive the Trustee of any of its rights as such holder. Nothing in this Article XII shall apply to claims of, or payments to, the Trustee under or pursuant to Section 7.06.

     Section 12.10 Distribution or Notice to Representative. Whenever a distribution is to be made or a notice given to holders of Senior Indebtedness, the distribution may be made and the notice given to their Representative (if any).

     Section 12.11 Article XII Not to Prevent Defaults or Limit Right to Accelerate. The failure to make a payment pursuant to the Debt Securities by reason of any provision in this Article XII shall not be construed as preventing the occurrence of a Default. Nothing in this Article XII shall have any effect on the right of the Holders or the Trustee to accelerate the maturity of either the Subordinated Debt Securities or the Debt Securities, as the case may be.

     Section 12.12 Trust Moneys Not Subordinated. Notwithstanding anything contained herein to the contrary, payments from money or the proceeds of U.S. Government Obligations held in trust under Article XI by the Trustee for the payment of principal of, and premium, if any, and interest on, the Subordinated Debt Securities or the Debt Securities shall not be subordinated to the prior payment of any

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Senior Indebtedness or subject to the restrictions set forth in this Article XII, and none of the Holders thereof shall be obligated to pay over any such amount to the Company or any holder of Senior Indebtedness of the Company or any other creditor of the Company.

     Section 12.13 Trustee Entitled to Rely. Upon any payment or distribution pursuant to this Article XII, the Trustee and the Holders shall be entitled to rely (a) upon any order or decree of a court of competent jurisdiction in which any proceedings of the nature referred to in Section 12.02 are pending, (b) upon a certificate of the liquidating trustee or agent or other Person making such payment or distribution to the Trustee or to such Holders or (c) upon the Representatives for the holders of Senior Indebtedness for the purpose of ascertaining the Persons entitled to participate in such payment or distribution, the holders of the Senior Indebtedness and other Indebtedness of the Company, the amount thereof or payable thereon, the amount or amounts paid or distributed thereon and all other facts pertinent thereto or to this Article XII. In the event that the Trustee determines, in good faith, that evidence is required with respect to the right of any Person as a holder of Senior Indebtedness to participate in any payment or distribution pursuant to this Article XII, the Trustee may request such Person to furnish evidence to the reasonable satisfaction of the Trustee as to the amount of Senior Indebtedness held by such Person, the extent to which such Person is entitled to participate in such payment or distribution and other facts pertinent to the rights of such Person under this Article XII, and, if such evidence is not furnished, the Trustee may defer any payment to such Person pending judicial determination as to the right of such Person to receive such payment. The provisions of Section 7.01 and Section 7.02 shall be applicable to all actions or omissions of actions by the Trustee pursuant to this Article XII.

     Section 12.14 Trustee to Effectuate Subordination. Each Holder by accepting a Subordinated Debt Security authorizes and directs the Trustee on his behalf to take such action as may be necessary or appropriate to acknowledge or effectuate the subordination between the Holders of Subordinated Debt Securities and the holders of Senior Indebtedness as provided in this Article XII and appoints the Trustee as attorney-in-fact for any and all such purposes.

     Section 12.15 Trustee Not Fiduciary for Holders of Senior Indebtedness. The Trustee shall not be deemed to owe any fiduciary duty to the holders of Senior Indebtedness and shall not be liable to any such holders if it shall mistakenly pay over or distribute to Holders of Subordinated Debt Securities or the Company or any other Person, money or assets to which any holders of Senior Indebtedness shall be entitled by virtue of this Article XII or otherwise.

     Section 12.16 Reliance by Holders of Senior Indebtedness on Subordination Provisions. Each Holder by accepting a Subordinated Debt Security acknowledges and agrees that the foregoing subordination provisions are, and are intended to be, an inducement and a consideration to each holder of any Senior Indebtedness, whether such Senior Indebtedness was created or acquired before or after the issuance of the Subordinated Debt Securities, to acquire and continue to hold, or to continue to hold, such Senior Indebtedness and such holder of Senior Indebtedness shall be deemed conclusively to have relied on such subordination provisions in acquiring and continuing to hold, or in continuing to hold, such Senior Indebtedness.

ARTICLE XIII
MISCELLANEOUS PROVISIONS

     Section 13.01 Successors and Assigns of Company Bound by Indenture. All the covenants, stipulations, promises and agreements in this Indenture contained by or in behalf of the Company or the Trustee shall bind its successors and assigns, whether so expressed or not.

     Section 13.02 Acts of Board, Committee or Officer of Successor Company Valid. Any act or proceeding by any provision of this Indenture authorized or required to be done or performed by any board, committee or officer of the Company shall and may be done and performed with like force and effect by the like board, committee or officer of any Successor Company.

56

     Section 13.03 Notices, Demands, Etc. to the Trustee or the Company. Except as otherwise expressly provided in this Indenture, any notice or communication by the Company or any Holder to the Trustee or by the Trustee or any Holder to the Company is duly given if in writing in the English language and delivered in person or mailed by registered or certified mail (return receipt requested), telecopier or overnight air courier guaranteeing next day delivery, to:

If to the Company:

Pioneer Natural Resources Company
5205 North O’Connor Boulevard, Suite 200
Irving, Texas 75039
Attention: Chief Financial Officer.
Telecopy No. (972) 969-3572

If to the Trustee:

Wells Fargo Bank, National Association
201 Main Street, Suite 301
Fort Worth, Texas 76102
Telecopy No. (817) 885-8650

     The Company by notice to the Trustee and the Holders may designate additional or different addresses for subsequent notices or communications. The Trustee by notice to the Company and the Holders may designate additional or different addresses for subsequent notices or communications.

     All notices and communications shall be deemed to have been duly given: at the time delivered by hand, if personally delivered; five business days after being deposited in the mail, postage prepaid, if mailed; on the first business day on or after being sent, if telecopied and the sender receives confirmation of successful transmission; and the next business day after timely delivery to the courier, if sent by overnight air courier guaranteeing next day delivery.

     Section 13.04 Notices to Holders; Waiver.

     Any notice required or permitted to a Registered Holder by the Company or the Trustee pursuant to the provisions of this Indenture shall be deemed to be properly mailed by being deposited postage prepaid in a post office letter box in the United States addressed to such Holder at the address of such Holder as shown on the Debt Security Register. Any report pursuant to Section 313 of the Trust Indenture Act shall be transmitted in compliance with subsection (c) therein. In the event of suspension of regular mail service or by reason of any other cause it shall be impracticable to give notice by mail, then such notification as shall be given with the approval of the Trustee shall constitute sufficient notice for every purpose hereunder.

     Any notice required or permitted to a Bearer Holder by the Company or the Trustee pursuant to this Indenture shall be deemed to be properly given if published on two separate business days in an Authorized Newspaper or Newspapers in such Place or Places of Payment specified pursuant to Section 2.03, the first such publication to be not earlier than the earliest date and not later than two business days prior to the latest date prescribed for the giving of such notice. Notwithstanding the foregoing, any notice to Holders of Floating Rate Debt Securities regarding the determination of a periodic rate of interest, if such notice is required pursuant to Section 2.03, shall be sufficiently given if given in the manner specified pursuant to Section 2.03. In the event of suspension of publication of any Authorized Newspaper or by reason of any other cause it shall be impracticable to give notice by publication, then such notification as shall be given with the approval of the Trustee shall constitute sufficient notice for every purpose hereunder.

57

     Failure to mail a notice or communication to a Holder or any defect in it or any defect in any notice by publication as to a Holder shall not affect the sufficiency of such notice with respect to other Holders. If a notice or communication is mailed or published in the manner provided above, it is conclusively presumed duly given.

     Where this Indenture or any Debt Security provides for notice in any manner, such notice may be waived in writing by the Person entitled to receive such notice, either before or after the event, and such waiver shall be the equivalent of such notice. Waivers of notice by Holders shall be filed with the Trustee, but such filing shall not be a condition precedent to the validity of any action taken in reliance upon such waiver.

     Section 13.05 Indenture and Debt Securities to be construed in Accordance with the Laws of the State of New York. THIS INDENTURE, EACH DEBT SECURITY AND EACH COUPON SHALL BE DEEMED TO BE NEW YORK CONTRACTS, AND FOR ALL PURPOSES SHALL BE GOVERNED BY AND CONSTRUED IN ACCORDANCE WITH THE LAWS OF SAID STATE.

     Section 13.06 Officers’ Certificate and Opinion of Counsel to be Furnished upon Application or Demand by the Company. Upon any application or demand by the Company to the Trustee to take any action under any of the provisions of this Indenture, the Company shall furnish to the Trustee an Officers’ Certificate stating that all conditions precedent provided for in this Indenture relating to the proposed action have been complied with and an Opinion of Counsel stating that, in the opinion of such counsel, all such conditions precedent have been complied with, except that in the case of any such application or demand as to which the furnishing of such document is specifically required by any provision of this Indenture relating to such particular application or demand, no additional certificate or opinion need be furnished.

     Each certificate or opinion provided for in this Indenture and delivered to the Trustee with respect to compliance with a condition or covenant provided for in this Indenture shall include (a) a statement that the Person making such certificate or opinion has read such covenant or condition, (b) a brief statement as to the nature and scope of the examination or investigation upon which the statements or opinions contained in such certificate or opinion are based, (c) a statement that, in the opinion of such Person, he has made such examination or investigation as is necessary to enable him to express an informed opinion as to whether or not such covenant or condition has been complied with and (d) a statement as to whether or not, in the opinion of such Person, such condition or covenant has been complied with.

     Section 13.07 Payments Due on Legal Holidays. In any case where the date of maturity of interest on or principal of and premium, if any, on the Debt Securities of a series or the date fixed for redemption or repayment of any Debt Security or the making of any sinking fund payment shall not be a business day at any Place of Payment for the Debt Securities of such series, then payment of interest or principal and premium, if any, or the making of such sinking fund payment need not be made on such date at such Place of Payment, but may be made on the next succeeding business day at such Place of Payment with the same force and effect as if made on the date of maturity or the date fixed for redemption, and no interest shall accrue for the period after such date. If a record date is not a business day, the record date shall not be affected.

     Section 13.08 Provisions Required by Trust Indenture Act to Control. If and to the extent that any provision of this Indenture limits, qualifies or conflicts with another provision included in this Indenture which is required to be included in this Indenture by any of Sections 310 to 318, inclusive, of the Trust Indenture Act, such required provision shall control.

     Section 13.09 Computation of Interest on Debt Securities. Interest, if any, on the Debt Securities shall be computed on the basis of a 360-day year of 12 30-day months, except as may otherwise be provided pursuant to Section 2.03.

58

     Section 13.10 Rules by Trustee, Paying Agent and Registrar. The Trustee may make reasonable rules for action by or a meeting of Holders. The Registrar and any paying agent may make reasonable rules for their functions.

     Section 13.11 No Recourse Against Others. None of the past, present or future incorporators, directors, officers, employees or stockholders, as such, of the Company shall have any liability for any obligations of the Company under the Debt Securities, the Coupons or this Indenture or for any claim based on, in respect of or by reason of such obligations or their creation. By accepting a Debt Security or Coupon, each Holder shall be deemed to have waived and released all such liability. The waiver and release shall be part of the consideration for the issue of the Debt Securities and Coupons.

     Section 13.12 Severability. In case any provision in this Indenture, the Debt Securities or the Coupons shall be invalid, illegal or unenforceable, the validity, legality and enforceability of the remaining provisions shall not in any way be affected or impaired thereby.

     Section 13.13 Effect of Headings. The article and section headings herein and in the Table of Contents are for convenience only and shall not affect the construction hereof.

     Section 13.14 Indenture May be Executed in Counterparts. This Indenture may be executed in any number of counterparts, each of which shall be an original; but such counterparts shall together constitute but one and the same instrument. Delivery of an executed counterpart of this Indenture by facsimile or electronic transmission shall be equally as effective as delivery of an original executed counterpart of this Indenture. Any party delivering an executed counterpart of this Indenture by facsimile or electronic transmission also shall deliver an original executed counterpart of this Indenture, but the failure to deliver an original executed counterpart shall not affect the validity, enforceability and binding effect of this Indenture.

     The Trustee hereby accepts the trusts in this Indenture upon the terms and conditions herein set forth.

     IN WITNESS WHEREOF, the parties hereto have caused this Indenture to be duly executed as of the day and year first above written.

PIONEER NATURAL RESOURCES COMPANY

By:

Name:

Title:

WELLS FARGO BANK, NATIONAL ASSOCIATION, as Trustee

By:
Name:	John C. Stohlmann
Title:	Vice President

59

EX-5.1

Exhibit 5.1

May 20, 2011

Pioneer Natural Resources Company
Pioneer Natural Resources USA, Inc.
5205 North O’Connor Blvd., Suite 200
Irving, Texas 75039

Ladies and Gentlemen:

     We have acted as counsel for Pioneer Natural Resources Company, a Delaware corporation (the “Company”), and Pioneer Natural Resources USA, Inc., a Delaware corporation (the “Subsidiary Guarantor”), in connection with the preparation of the registration statement on Form S-3 (the “Registration Statement”) filed with the Securities and Exchange Commission (the “Commission”) under the Securities Act of 1933 (the “Securities Act”), with respect to the Company’s (i) debt securities (the “Debt Securities”), in one or more series, which may be fully and unconditionally guaranteed (the “Guarantee”) by the Subsidiary Guarantor and which may be senior or senior subordinated in priority of payment, certain of which may be convertible or exchangeable into common stock, par value $.01 per share, of the Company (including the attached preferred stock purchase rights, “Common Stock”); (ii) shares of Common Stock; (iii) shares of preferred stock, par value $.01 per share, of the Company (“Preferred Stock”), which may be convertible into shares of Common Stock or exchangeable for Debt Securities (including the Guarantee, if applicable); (iv) depositary shares representing fractional interests in Preferred Stock (the “Depositary Shares”); (v) warrants to purchase Common Stock, Preferred Stock or Debt Securities (including the Guarantee, if applicable) (“Warrants”); (vi) contracts to purchase Common Stock or other securities at a future date or dates (the “Stock Purchase Contracts”); and (vii) Stock Purchase Contracts issued as a part of units consisting of a Stock Purchase Contract and Debt Securities (including the Guarantee, if applicable), Preferred Stock, Warrants or debt obligations of third parties, including United States treasury securities, securing the holders’ obligations to purchase the securities under the Stock Purchase Contracts (the “Stock Purchase Units”) (such Debt Securities (including the Guarantee, if applicable), Common Stock, Preferred Stock, Depositary Shares, Warrants, Stock Purchase Contracts and Stock Purchase Units are collectively referred to herein as the “Securities” and each, a “Security”). The Securities may be issued from time to time pursuant to Rule 415 under the Securities Act.

     We have examined originals or copies, certified or otherwise identified to our satisfaction, of (i) the Company’s amended and restated certificate of incorporation, its certificate of designations of Series A Junior Participating Preferred Stock and its amended

Vinson & Elkins LLP Attorneys at Law	Trammell Crow Center, 2001 Ross Avenue, Suite 3700
Abu Dhabi Austin Beijing Dallas Dubai Hong Kong Houston London	Dallas, TX 75201-2975
Moscow New York Palo Alto Riyadh Shanghai Tokyo Washington	Tel +1.214.220.7700 Fax +1.214.220.7716 www.velaw.com

May 20, 2011 Page 2

and restated bylaws, each as amended to the date hereof (collectively, the “Charter Documents”); (ii) resolutions adopted by the board of directors of the Company (the board of directors, or to the extent permitted by Section 141 of the Delaware General Corporation Law, a duly constituted and acting committee thereof, being referred to herein as the “Board”) and the board of directors of the Subsidiary Guarantor; (iii) the form of Indenture (the “Indenture”) between the Company and Wells Fargo Bank, National Association, as trustee, included as Exhibit 4.18 to the Registration Statement and (iv) such other certificates, statutes and other instruments and documents as we considered appropriate for purposes of the opinions hereafter expressed.

     As to any facts material to our opinion, we have made no independent investigation of such facts and have relied, to the extent that we deem such reliance proper, upon certificates of public officials and officers or other representatives of the Company.

     In rendering the opinions set forth below, we have assumed that (i) all information contained in all documents reviewed by us is true and correct; (ii) all signatures on all documents examined by us are genuine; (iii) all documents submitted to us as originals are authentic and all documents submitted to us as copies conform to the originals of those documents; (iv) each natural person signing any document reviewed by us had the legal capacity to do so; (v) each person signing in a representative capacity (other than on behalf of the Company and the Subsidiary Guarantor) any document reviewed by us had authority to sign in such capacity; (vi) the Registration Statement, and any amendments thereto (including post-effective amendments), will have become effective and comply with all applicable laws; (vii) a prospectus supplement will have been prepared and filed with the Commission describing the Securities offered thereby; (viii) all Securities will be issued and sold in compliance with applicable federal and state securities laws and in the manner stated in the Registration Statement and the applicable prospectus supplement; (ix) any supplemental indenture relating to a series of Debt Securities to be issued under the Indenture will be duly authorized, executed and delivered by the parties thereto in substantially the form reviewed by us; (x) a definitive purchase, underwriting or similar agreement with respect to any Securities offered will have been duly authorized and validly executed and delivered by the Company and the other parties thereto; (xi) any Securities issuable upon conversion, exchange or exercise of any Security being offered will have been duly authorized, created and, if appropriate, reserved for issuance upon such conversion, exchange or exercise; and (xii) with respect to shares of Common Stock or Preferred Stock offered, there will be sufficient shares of Common Stock or Preferred Stock authorized under the Company’s Charter Documents and not otherwise reserved for issuance.

May 20, 2011 Page 3

     Based upon the foregoing, we are of the opinion that:

     1. With respect to Debt Securities to be issued under the Indenture, when (i) the Indenture and the related Guarantee, if any, have been duly qualified under the Trust Indenture Act of 1939, as amended (the “TIA”); (ii) the Board and the board of directors of the Subsidiary Guarantor, if applicable, have taken all necessary corporate action to approve the issuance and terms of the Debt Securities and, if applicable, the Guarantee, the terms of the offering thereof and related matters; (iii) the terms of the Debt Securities and, if applicable, the Guarantee and of their issuance and sale have been established so as not to violate any applicable law or result in a default under or breach of any agreement or instrument binding upon the Company and the Subsidiary Guarantor, as applicable, and so as to comply with any requirement or restriction imposed by any court or governmental body having jurisdiction over the Company or the Subsidiary Guarantor, as applicable; and (iv) the Debt Securities and, if applicable, the Guarantee have been duly executed, authenticated, issued and delivered in accordance with the provisions of the Indenture and in accordance with the applicable definitive purchase, underwriting or similar agreement approved by the Board and, if applicable, the board of directors of the Subsidiary Guarantor upon payment of the consideration therefor provided for therein, the Debt Securities and, if applicable, the Guarantee, will be legally issued and will constitute valid and binding obligations of the Company and the Subsidiary Guarantor, respectively, enforceable against the Company and the Subsidiary Guarantor, respectively, in accordance with their terms and will be entitled to the benefits of the Indenture and, if applicable, the related Guarantee.

     2. With respect to shares of Common Stock, when (i) the Board has taken all necessary corporate action to approve the issuance and terms of the offering thereof and related matters; and (ii) certificates representing the shares of Common Stock have been duly executed, countersigned, registered and delivered either (a) in accordance with the applicable definitive purchase, underwriting or similar agreement approved by the Board upon payment of the consideration therefor (not less than the par value of the Common Stock) provided for therein, or (b) upon conversion, exchange or exercise of any other Security in accordance with the terms of the Security or the instrument governing the Security providing for the conversion, exchange or exercise as approved by the Board, for the consideration approved by the Board (not less than the par value of the Common Stock), the shares of Common Stock will be legally issued, fully paid and non-assessable.

     3. With respect to shares of any series of Preferred Stock, when (i) the Board has taken all necessary corporate action to approve the issuance and terms of the shares of the series, the terms of the offering thereof and related matters, including the adoption of a resolution establishing and designating the series and fixing and determining the preferences,

May 20, 2011 Page 4

limitations, and relative rights thereof and the filing of a certificate of designations with respect to the series with the Secretary of State of the State of Delaware as required under Section 151 of the Delaware General Corporation Law (the “Certificate of Designations”); and (ii) certificates representing the shares of the series of Preferred Stock have been duly executed, countersigned, registered and delivered either (a) in accordance with the applicable definitive purchase, underwriting or similar agreement approved by the Board upon payment of the consideration therefor (not less than the par value of the Preferred Stock) provided for therein, or (b) upon conversion, exchange or exercise of any other Security in accordance with the terms of the Security or the instrument governing the Security providing for the conversion, exchange or exercise as approved by the Board, for the consideration approved by the Board (not less than the par value of the Preferred Stock), the shares of the series of Preferred Stock will be legally issued, fully paid and non-assessable.

     4. With respect to Depositary Shares, when (i) the Board has taken all necessary corporate action to approve the issuance and terms of the Depositary Shares, the terms of the offering thereof and related matters, including the adoption of a Certificate of Designations relating to the Preferred Stock underlying the Depositary Shares and the filing of the Certificate of Designations with the Secretary of State of the State of Delaware; (ii) the depositary agreement or agreements relating to the Depositary Shares and the related depositary receipts have been duly authorized and validly executed and delivered by the Company and the depositary appointed by the Company; (iii) the shares of Preferred Stock underlying the Depositary Shares have been deposited with a bank or trust company (which meets the requirements for the depositary set forth in the Registration Statement) under the applicable depositary agreements; and (iv) the depositary receipts representing the Depositary Shares have been duly executed, countersigned, registered and delivered in accordance with the appropriate depositary agreement approved by the Board upon payment of the consideration therefor provided for therein, the Depositary Shares will be legally issued.

     5. With respect to the Warrants, when (i) the Board has taken all necessary corporate action to approve the creation of and the issuance and terms of the Warrants, the terms of the offering thereof and related matters; (ii) the warrant agreement or agreements relating to the Warrants have been duly authorized and validly executed and delivered by the Company and the warrant agent appointed by the Company; and (iii) the Warrants or certificates representing the Warrants have been duly executed, countersigned, registered and delivered in accordance with the appropriate warrant agreement or agreements and the applicable definitive purchase, underwriting or similar agreement approved by the Board upon payment of the consideration therefor provided for therein, the Warrants will be legally issued.

May 20, 2011 Page 5

     6. With respect to Stock Purchase Contracts, when (i) the purchase agreement for the Stock Purchase Contracts has been duly authorized and validly executed by the parties thereto; (ii) the Board has taken all necessary corporate action to approve and establish the terms of the Stock Purchase Contracts and to authorize and approve the issuance thereof, the terms of the offering and related matters; and (iii) the Stock Purchase Contracts have been duly executed and delivered in accordance with the purchase agreement and the applicable definitive purchase, underwriting or similar agreement approved by or on behalf of the Board upon payment of the consideration therefor provided for therein, the Stock Purchase Contracts will be legally issued.

     7. With respect to Stock Purchase Units, when (i) the purchase agreement for the Stock Purchase Units has been duly authorized and validly executed by the parties thereto; (ii) the Board has taken all necessary corporate action to approve and establish the terms of the Stock Purchase Units and to authorize and approve the issuance thereof, the terms of the offering and related matters; and (iii) the Stock Purchase Units have been duly executed and delivered in accordance with the purchase agreement and the applicable definitive purchase, underwriting or similar agreement approved by or on behalf of the Board upon payment of the consideration therefor provided therein, the Stock Purchase Units will be legally issued.

     The foregoing opinions are qualified to the extent that the enforceability of any document, instrument or Security may be limited by or subject to (i) bankruptcy, insolvency, fraudulent transfer or conveyance, reorganization, moratorium or other similar laws relating to or affecting creditors’ rights generally, and general equitable or public policy principles, and (ii) with respect to any Debt Securities denominated in a currency other than United States dollars, the requirement that a claim (or a foreign currency judgment in respect of such a claim) with respect to such Securities be converted to United States dollars at a rate of exchange prevailing on a date determined pursuant to applicable law or governmental authority.

     We express no opinions concerning (i) the validity or enforceability of any provisions contained in the Indenture that purport to waive or not give effect to rights to notices, defenses, subrogation or other rights or benefits that cannot be effectively waived under applicable law, (ii) the enforceability of indemnification provisions to the extent they purport to relate to liabilities resulting from or based upon negligence or any violation of federal or state securities or blue sky laws, or (iii) the validity or enforceability of provisions that limit the obligation of a guarantor based on the potential unenforceability, invalidity or voidability of a guarantee under any applicable law, including, without limitation, any state or federal fraudulent transfer or fraudulent conveyance laws.

May 20, 2011 Page 6

     The foregoing opinions are limited in all respects to the laws of the States of Delaware, New York and Texas and the federal laws of the United States of America, and we do not express any opinions as to the laws of any other jurisdiction.

     We hereby consent to the filing of this opinion as an exhibit to the Registration Statement. In giving this consent, we do not admit that we are within the category of persons whose consent is required under Section 7 of the Securities Act and the rules and regulations of the Commission issued thereunder.

Very truly yours,

/s/ Vinson & Elkins L.L.P.

EX-23.1

Exhibit 23.1

Consent of Independent Registered Public Accounting Firm

We consent to the reference to our firm under the caption “Experts” in this Registration Statement (Form S-3) and related Prospectus of Pioneer Natural Resources Company and Pioneer Natural Resources USA, Inc. for the registration of debt securities, guarantees of debt securities, common stock, preferred stock, depositary shares, warrants, stock purchase contracts and stock purchase units and to the incorporation by reference therein of our reports dated February 25, 2011, with respect to the consolidated financial statements of Pioneer Natural Resources Company, and the effectiveness of internal control over financial reporting of Pioneer Natural Resources Company, included in its Annual Report (Form 10-K) for the year ended December 31, 2010, filed with the Securities and Exchange Commission.

/s/ Ernst & Young LLP

Dallas, Texas
May 20, 2011

EX-23.3

Exhibit 23.3

CONSENT OF INDEPENDENT PETROLEUM ENGINEERS AND GEOLOGISTS

     Netherland, Sewell & Associates, Inc. hereby consents to the incorporation by reference in this Registration Statement on Form S-3 of Pioneer Natural Resources Company to be filed on or about May 20, 2011, of all references to our firm and information from our audit letter dated January 31, 2011, included in or made a part of the Annual Report on Form 10-K of Pioneer Natural Resources Company for the year ended December 31, 2010. We also consent to the reference to us under the heading “Experts” in such Registration Statement.

NETHERLAND, SEWELL & ASSOCIATES, INC.
By:	/s/ C. H. (Scott) Rees III  C. H. (Scott) Rees III, P.E.
	Chairman and Chief Executive Officer

Dallas, Texas
May 20, 2011

EX-25.1

Exhibit 25.1

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM T-1

STATEMENT OF ELIGIBILITY
UNDER THE TRUST INDENTURE ACT OF 1939 OF A
CORPORATION DESIGNATED TO ACT AS TRUSTEE

o CHECK IF AN APPLICATION TO DETERMINE ELIGIBILITY OF A TRUSTEE PURSUANT TO
SECTION 305(b) (2)

WELLS FARGO BANK, NATIONAL ASSOCIATION
(Exact name of trustee as specified in its charter)

A National Banking Association	94-1347393
(Jurisdiction of incorporation or	(I.R.S. Employer
organization if not a U.S. national bank)	Identification No.)
101 North Phillips Avenue
Sioux Falls, South Dakota	57104
(Address of principal executive offices)	(Zip code)

Wells Fargo & Company
Law Department, Trust Section
MAC N9305-175
Sixth Street and Marquette Avenue, 17^th Floor
Minneapolis, Minnesota 55479
(612) 667-4608
(Name, address and telephone number of agent for service)

Pioneer Natural Resources Company
(Exact name of obligor as specified in its charter)

Delaware	75-2702753
(State or other jurisdiction of	(I.R.S. Employer
incorporation or organization)	Identification No.)
5205 N. O’Connor Boulevard, Suite 200
Irving, Texas	75039
(Address of principal executive offices)	(Zip code)

Pioneer Natural Resources USA, Inc.
(Exact name of obligor as specified in its charter)

Delaware	75-2516853
(State or other jurisdiction of	(I.R.S. Employer
incorporation or organization)	Identification No.)
5205 N. O’Connor Boulevard, Suite 200
Irving, Texas	75039
(Address of principal executive offices)	(Zip code)

Debt Securities
(Title of the indenture securities)

Item 1. General Information. Furnish the following information as to the trustee:

(a)	Name and address of each examining or supervising authority to which it is subject.
	Comptroller of the Currency Administrator of National Banks United States Department of the Treasury Washington, D.C. 20219
	Federal Deposit Insurance Corporation 550 17th Street, N.W. Washington, D.C. 20429
	Federal Reserve Bank of San Francisco P.O. Box 7702 San Francisco, CA 94120
(b)	Whether it is authorized to exercise corporate trust powers.
	The trustee is authorized to exercise corporate trust powers.

Item 2. Affiliations with Obligor. If the obligor is an affiliate of the trustee, describe each such affiliation.

None with respect to the trustee.

No responses are included for Items 3-14 of this Form T-1 because the obligor is not in default as provided under Item 13.

Item 15. Foreign Trustee. Not applicable.

Item 16. List of Exhibits. List below all exhibits filed as a part of this Statement of Eligibility.

Exhibit 1.	A copy of the Articles of Association of the trustee now in effect.*
Exhibit 2.	A copy of the Comptroller of the Currency Certificate of Corporate Existence and Fiduciary Powers for Wells Fargo Bank, National Association, dated February 4, 2004.**

Exhibit 3.	See Exhibit 2
Exhibit 4.	Copy of By-laws of the trustee as now in effect.***
Exhibit 5.	Not applicable.
Exhibit 6.	The consent of the trustee required by Section 321(b) of the Act.
Exhibit 7.	A copy of the latest report of condition of the trustee published pursuant to law or the requirements of its supervising or examining authority.
Exhibit 8.	Not applicable.
Exhibit 9.	Not applicable.

*	Incorporated by reference to the exhibit of the same number to the trustee’s Form T-1 filed as exhibit 25 to the Form S-4 dated December 30, 2005 of Hornbeck Offshore Services LLC file number 333-130784-06.
**	Incorporated by reference to the exhibit of the same number to the trustee’s Form T-1 filed as exhibit 25 to the Form T-3 dated March 3, 2004 of Trans-Lux Corporation file number 022-28721.
***	Incorporated by reference to the exhibit of the same number to the trustee’s Form T-1 filed as exhibit 25 to the Form S-4 dated May 26, 2005 of Penn National Gaming Inc. file number 333-125274.

SIGNATURE

Pursuant to the requirements of the Trust Indenture Act of 1939, as amended, the trustee, Wells Fargo Bank, National Association, a national banking association organized and existing under the laws of the United States of America, has duly caused this statement of eligibility to be signed on its behalf by the undersigned, thereunto duly authorized, all in the City of Dallas and State of Texas on the 17th day of May, 2011.

WELLS FARGO BANK, NATIONAL ASSOCIATION

John C. Stohlmann
Vice President

EXHIBIT 6

May 17, 2011

Securities and Exchange Commission
Washington, D.C. 20549

Gentlemen:

In accordance with Section 321(b) of the Trust Indenture Act of 1939, as amended, the undersigned hereby consents that reports of examination of the undersigned made by Federal, State, Territorial, or District authorities authorized to make such examination may be furnished by such authorities to the Securities and Exchange Commission upon its request thereof.

Very truly yours,

WELLS FARGO BANK, NATIONAL ASSOCIATION

John C. Stohlmann
Vice President

Consolidated Report of Condition of

Wells Fargo Bank National Association
of 101 North Phillips Avenue, Sioux Falls, SD 57104
And Foreign and Domestic Subsidiaries,
at the close of business December 31, 2010, filed in accordance with 12 U.S.C. §161 for National Banks.

		Dollar Amounts
		In Millions
ASSETS
Cash and balances due from depository institutions:
Noninterest-bearing balances and currency and coin		$	17,518
Interest-bearing balances			57,228
Securities:
Held-to-maturity securities			0
Available-for-sale securities			150,439
Federal funds sold and securities purchased under agreements to resell:
Federal funds sold in domestic offices			1,656
Securities purchased under agreements to resell			16,821
Loans and lease financing receivables:
Loans and leases held for sale			38,095
Loans and leases, net of unearned income	691,483
LESS: Allowance for loan and lease losses	19,637
Loans and leases, net of unearned income and allowance			671,846
Trading Assets			30,824
Premises and fixed assets (including capitalized leases)			8,129
Other real estate owned			5,713
Investments in unconsolidated subsidiaries and associated companies			659
Direct and indirect investments in real estate ventures			111
Intangible assets
Goodwill			20,931
Other intangible assets			26,452
Other assets			55,856
Total assets		$	1,102,278
LIABILITIES
Deposits:
In domestic offices		$	747,742
Noninterest-bearing	165,559
Interest-bearing	582,183
In foreign offices, Edge and Agreement subsidiaries, and IBFs			99,235
Noninterest-bearing	2,029
Interest-bearing	97,206
Federal funds purchased and securities sold under agreements to repurchase:
Federal funds purchased in domestic offices			2,930
Securities sold under agreements to repurchase			16,102

	Dollar Amounts
	In Millions
Trading liabilities		15,647
Other borrowed money (includes mortgage indebtedness and obligations under capitalized leases)		40,254
Subordinated notes and debentures		19,252
Other liabilities		37,554
Total liabilities	$	978,716
EQUITY CAPITAL
Perpetual preferred stock and related surplus		0
Common stock		519
Surplus (exclude all surplus related to preferred stock)		98,971
Retained earnings		17,489
Accumulated other comprehensive income		5,280
Other equity capital components		0
Total bank equity capital		122,259
Noncontrolling (minority) interests in consolidated subsidiaries		1,303
Total equity capital		123,562
Total liabilities, and equity capital	$	1,102,278

I, Howard I. Atkins, EVP & CFO of the above-named bank do hereby declare that this Report of Condition has been prepared in conformance with the instructions issued by the appropriate Federal regulatory authority and is true to the best of my knowledge and belief.

Howard I. Atkins
EVP & CFO

We, the undersigned directors, attest to the correctness of this Report of Condition and declare that it has been examined by us and to the best of our knowledge and belief has been prepared in conformance with the instructions issued by the appropriate Federal regulatory authority and is true and correct.

John Stumpf                     Directors
Dave Hoyt
Michael Loughlin