8-K

UNITED STATES
SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM 8-K

CURRENT REPORT
PURSUANT TO SECTION 13 OR 15(d) OF THE
SECURITIES EXCHANGE ACT OF 1934

DATE OF REPORT (DATE OF EARLIEST EVENT REPORTED): October 5, 2010

		IRS Employer
Commission	Registrant; State of Incorporation;	Identification
File Number	Address; and Telephone Number	Number
1-13739	UNISOURCE ENERGY CORPORATION (An Arizona Corporation) One South Church Avenue, Suite 100 Tucson, AZ 85701 (520) 571-4000	86-0786732
1-5924	TUCSON ELECTRIC POWER COMPANY (An Arizona Corporation) One South Church Avenue, Suite 100 Tucson, AZ 85701 (520) 571-4000	86-0062700

     Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions:

o Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425)

o Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12)

o Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b))

o Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c))

Item 2.03 – Creation of a Direct Financial Obligation or an Obligation under an Off-Balance Sheet Arrangement of a Registrant.

On October 5, 2010, The Industrial Development Authority of the County of Pima (Authority) issued and sold in a public offering for the benefit of Tucson Electric Power Company (TEP) $100,000,000 aggregate principal amount of tax-exempt industrial development revenue bonds (Bonds). The Bonds bear interest at the rate of 5.25%, payable semi-annually on April 1 and October 1 of each year, commencing April 1, 2011, and mature on October 1, 2040.  

The Bonds were issued under an Indenture of Trust, dated as of October 1, 2010 (Indenture), between the Authority and U.S. Bank Trust National Association, as Trustee (Trustee). The Bonds are payable solely from payments to be made by TEP pursuant to a Loan Agreement, dated as of October 1, 2010, between TEP and the Authority (Loan Agreement), pursuant to which the Authority has loaned the proceeds of the Bonds to TEP. Pursuant to the Loan Agreement, TEP is obligated to make payments in such amounts and at such times as will be sufficient to pay, when due, the principal of, and premium, if any, and interest on the Bonds. TEP’s obligations under the Loan Agreement are unsecured.

The proceeds of the sale of the Bonds will be applied to the costs of construction of certain of TEP’s transmission and distribution facilities used to provide retail electric utility services in Pima County.

The foregoing summary does not purport to be complete and is qualified in its entirety by reference to the complete text of the Indenture and Loan Agreement.

Item 9.01 — Financial Statements and Exhibits.

(d) Exhibits

4(a) Indenture of Trust, dated as of October 1, 2010, between The Industrial Development Authority of the County of Pima and U.S. Bank Trust National Association, authorizing Industrial Development Revenue Bonds, 2010 Series A (Tucson Electric Power Company Project).

4(b) Loan Agreement, dated as of October 1, 2010, between The Industrial Development Authority of the County of Pima and TEP, relating to Industrial Development Revenue Bonds, 2010 Series A (Tucson Electric Power Company Project).

SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, each registrant has duly caused this report to be signed on its behalf by the undersigned thereunto duly authorized.

Date: October 8, 2010	UNISOURCE ENERGY CORPORATION
	(Registrant)
	/s/ Kevin P. Larson
	Senior Vice President and Chief Financial Officer
Date: October 8, 2010	TUCSON ELECTRIC POWER COMPANY
	(Registrant)
	/s/ Kevin P. Larson
	Senior Vice President and Chief Financial Officer

EX-4.(A)

Exhibit 4(a)

INDENTURE OF TRUST
(2010 SERIES A)

BETWEEN

THE INDUSTRIAL DEVELOPMENT AUTHORITY
OF THE COUNTY OF PIMA

AND

U.S. BANK TRUST NATIONAL ASSOCIATION

DATED AS OF OCTOBER 1, 2010

Authorizing
Industrial Development Revenue Bonds,
2010 Series A
(Tucson Electric Power Company Project)

TABLE OF CONTENTS

	Page
ARTICLE I DEFINITIONS		2
Section 1.01 Definitions		2
ARTICLE II THE BONDS		8
Section 2.01 Creation of Bonds		8
Section 2.02 Form of Bonds		9
Section 2.03 Execution of Bonds		9
Section 2.04 Authentication of Bonds		10
Section 2.05 Bonds Not General Obligations		10
Section 2.06 Prerequisites to Authentication of Bonds		10
Section 2.07 Lost or Destroyed Bonds or Bonds Canceled in Error		11
Section 2.08 Transfer, Registration and Exchange of Bonds		11
Section 2.09 Other Obligations		13
Section 2.10 Temporary Bonds		13
Section 2.11 Cancellation of Bonds		13
Section 2.12 Payment of Principal and Interest		13
Section 2.13 Applicability of Book-Entry Provisions		14
ARTICLE III REDEMPTION OF BONDS		14
Section 3.01 Redemption Provisions		14
Section 3.02 Selection of Bonds to be Redeemed		15
Section 3.03 Procedure for Redemption		16
Section 3.04 Payment of Redemption Price		17
Section 3.05 No Partial Redemption After Default		17
ARTICLE IV THE BOND FUND		17
Section 4.01 Creation of Bond Fund		17
Section 4.02 Liens		17
Section 4.03 Deposits into Bond Fund		17
Section 4.04 Use of Moneys in Bond Fund		18
Section 4.05 Custody of Bond Fund; Withdrawal of Moneys		18
Section 4.06 Bonds Not Presented for Payment		18
Section 4.07 Moneys Held in Trust		19

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TABLE OF CONTENTS
(continued)

	Page
ARTICLE V THE CONSTRUCTION FUND		19
Section 5.01 Creation of, and Disbursements from, Construction Fund		19
Section 5.02 Completion of Facilities; Termination of Construction		20
Section 5.03 Redemption of All Outstanding Bonds		21
Section 5.04 Acceleration of Bonds		21
Section 5.05 Refunding of Bonds		21
Section 5.06 Moneys Held in Trust		22
ARTICLE VI INVESTMENTS		22
Section 6.01 Investments		22
ARTICLE VII GENERAL COVENANTS		22
Section 7.01 No General Obligations		22
Section 7.02 Performance of Covenants of the Authority; Representations		23
Section 7.03 Maintenance of Rights and Powers; Compliance with Laws		23
Section 7.04 Enforcement of Obligations of the Company; Amendments		23
Section 7.05 Further Instruments		23
Section 7.06 No Disposition of Trust Estate		23
Section 7.07 Financing Statements		24
Section 7.08 Tax Covenants; Rebate Fund		24
ARTICLE VIII DEFEASANCE		25
Section 8.01 Defeasance		25
ARTICLE IX DEFAULTS AND REMEDIES		26
Section 9.01 Events of Default		26
Section 9.02 Remedies		27
Section 9.03 Restoration to Former Position		28
Section 9.04 Owners’ Right to Direct Proceedings		28
Section 9.05 Limitation on Owners’ Right to Institute Proceedings		28
Section 9.06 No Impairment of Right to Enforce Payment		29
Section 9.07 Proceedings by Trustee without Possession of Bonds		29
Section 9.08 No Remedy Exclusive		29
Section 9.09 No Waiver of Remedies		29

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TABLE OF CONTENTS
(continued)

	Page
Section 9.10 Application of Moneys		29
Section 9.11 Severability of Remedies		30
ARTICLE X TRUSTEE		30
Section 10.01 Acceptance of Trusts		30
Section 10.02 No Responsibility for Recitals		30
Section 10.03 Limitations on Liability		30
Section 10.04 Compensation, Expenses and Advances		31
Section 10.05 Notice of Events of Default		31
Section 10.06 Action by Trustee		32
Section 10.07 Good Faith Reliance		32
Section 10.08 Dealings in Bonds and with the Authority and the Company		32
Section 10.09 Allowance of Interest		32
Section 10.10 Construction of Indenture		32
Section 10.11 Resignation of Trustee		33
Section 10.12 Removal of Trustee		33
Section 10.13 Appointment of Successor Trustee		33
Section 10.14 Qualifications of Successor Trustee		34
Section 10.15 Judicial Appointment of Successor Trustee		34
Section 10.16 Acceptance of Trusts by Successor Trustee		34
Section 10.17 Successor by Merger or Consolidation		34
Section 10.18 Standard of Care		35
Section 10.19 Notice to Owners of Bonds of Event of Default		35
Section 10.20 Intervention in Litigation of the Authority		35
Section 10.21 Notices of Trustee		35
ARTICLE XI EXECUTION OF INSTRUMENTS BY OWNERS OF BONDS AND PROOF OF OWNERSHIP OF BONDS		35
Section 11.01 Execution of Instruments; Proof of Ownership		35
ARTICLE XII MODIFICATION OF THIS INDENTURE AND THE LOAN AGREEMENT		36
Section 12.01 Limitations		36
Section 12.02 Supplemental Indentures without Owner Consent		36

-iii-

TABLE OF CONTENTS
(continued)

	Page
Section 12.03 Supplemental Indentures with Consent of Owners		37
Section 12.04 Effect of Supplemental Indenture		38
Section 12.05 Consent of the Company		38
Section 12.06 Amendment of Loan Agreement without Consent of Owners		38
Section 12.07 Amendment of Loan Agreement with Consent of Owners		39
ARTICLE XIII MISCELLANEOUS		39
Section 13.01 Successors of the Authority		39
Section 13.02 Parties in Interest		40
Section 13.03 Severability		40
Section 13.04 No Personal Liability of Authority Officials		40
Section 13.05 Bonds Owned by the Authority or the Company		40
Section 13.06 Counterparts		40
Section 13.07 Governing Law		41
Section 13.08 Notices		41
Section 13.09 Holidays		41
Section 13.10 Statutory Notice Regarding Cancellation of Contracts		41
Exhibit A — Form of 2010 Series A Bond		A-1
Exhibit B — Form of Endorsement of Transfer		B-1
Exhibit C — Form of Certificate of Authentication		C-1
Exhibit D — Form of Requisition		D-1

* This table of contents is not a part of the Indenture and is for convenience only. The captions herein are of no legal effect and do not vary the meaning or legal effect of any part of the Indenture.

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INDENTURE OF TRUST

THIS INDENTURE OF TRUST (2010 Series A), dated as of October 1, 2010 (this “Indenture”), between THE INDUSTRIAL DEVELOPMENT AUTHORITY OF THE COUNTY OF PIMA, an Arizona nonprofit corporation designated by law as a political subdivision of the State of Arizona (hereinafter called the “Authority”), and U.S. Bank Trust National Association, as trustee (hereinafter called the “Trustee”),

W I T N E S S E T H:

WHEREAS, the Authority is authorized and empowered under Title 35, Chapter 5, Arizona Revised Statutes, as amended (the “Act”), to issue its bonds in accordance with the Act and to make secured or unsecured loans for the purpose of financing or refinancing the acquisition, construction, improvement or equipping of projects consisting of land, any building or other improvement, and all real and personal properties, including machinery and equipment, whether or not now in existence or under construction, whether located within or without the State of Arizona or Pima County, which shall be suitable for, among other things, facilities for the furnishing of electric energy, gas or water, and to charge and collect interest on such loans and pledge the proceeds of loan agreements as security for the payment of the principal of and interest on bonds, or designated issues of bonds, issued by the Authority and any agreements made in connection therewith, whenever the Board of Directors of the Authority finds such loans to further advance the interest of the Authority or the public and in the public interest; and

WHEREAS, the Authority proposes to issue and sell its revenue bonds as provided herein (the “Bonds”) for the purpose of financing a portion of the costs of the acquisition, construction, improvement and equipping certain of the facilities for the furnishing of electric energy (the “Facilities”) as described in Exhibit A to the Loan Agreement, dated as of October 1, 2010 (the “Loan Agreement”), between the Authority and Tucson Electric Power Company, an Arizona corporation (the “Company”);

NOW, THEREFORE, for and in consideration of these premises and the mutual covenants herein contained, of the acceptance by the Trustee of the trusts hereby created, of the purchase and acceptance of the Bonds by the Owners (as hereinafter defined) thereof, and for other good and valuable consideration the receipt and sufficiency of which are hereby acknowledged, in order to secure the payment of the principal of and interest on the Bonds at any time Outstanding (as hereinafter defined) under this Indenture according to their tenor and effect and the performance and observance by the Authority of all the covenants and conditions expressed or implied herein and contained in the Bonds, the Authority does hereby grant, bargain, sell, convey, mortgage, pledge and assign, and grant a security interest in, the Trust Estate (as hereinafter defined) to the Trustee, its successors in trust and their assigns forever;

TO HAVE AND TO HOLD all the same with all privileges and appurtenances hereby conveyed and assigned, or agreed or intended so to be, to the Trustee, its successors in trust and their assigns forever;

IN TRUST NEVERTHELESS, upon the terms and trusts herein set forth, first, for the equal and proportionate benefit and security of all Owners of the Bonds issued under and secured by this Indenture without preference, priority or distinction as to the lien of any Bonds over any other Bonds;

PROVIDED, HOWEVER, that if, after the right, title and interest of the Trustee in and to the Trust Estate shall have ceased, terminated and become void in accordance with ARTICLE VIII hereof, the principal of and interest on the Bonds shall have been paid to the Owners thereof, or shall have been paid to the Company pursuant to Section 4.06 hereof, then and in that case these presents and the estate and rights hereby granted shall cease, terminate and be void, and thereupon the Trustee shall cancel and discharge this Indenture and execute and deliver to the Authority and the Company such instruments in writing as shall be requisite to evidence the discharge hereof; otherwise this Indenture is to be and remain in full force and effect.

THIS INDENTURE OF TRUST FURTHER WITNESSETH, and it is expressly declared, that all Bonds issued and secured hereunder are to be issued, authenticated and delivered, and the Trust Estate and the other estate and rights hereby granted are to be dealt with and disposed of, under, upon and subject to the terms, conditions, stipulations, covenants, agreements, trusts, uses and purposes as hereinafter expressed, and the Authority has agreed and covenanted, and does hereby agree and covenant, with the Trustee and with the respective Owners, from time to time, of the Bonds, as follows:

ARTICLE I

DEFINITIONS

Section 1.01 Definitions. The terms defined in this ARTICLE I shall, for all purposes of this Indenture, have the meanings herein specified, unless the context clearly requires otherwise:

Act:

“Act” shall mean Title 35, Chapter 5, Arizona Revised Statutes, and all acts supplemental thereto or amendatory thereof.

Administration Expenses:

“Administration Expenses” shall mean the reasonable expenses incurred by the Authority with respect to the Loan Agreement, this Indenture and any transaction or event contemplated by the Loan Agreement or this Indenture, including the compensation and reimbursement of expenses and advances payable to the Trustee and a pro rata share of the Authority’s annual operating expenses in accordance with the provisions of Section 4.02(c) of The Industrial Development Authority of the County of Pima Procedural Pamphlet II, as more fully described in the Tax Agreement.

Authority:

“Authority” shall mean The Industrial Development Authority of the County of Pima, an Arizona nonprofit corporation designated by law as a political subdivision of the State of Arizona incorporated for and with the approval of Pima County, Arizona, pursuant to the provisions of the Constitution of the State of Arizona and the Act, its successors and their assigns.

2

Authorized Company Representative:

“Authorized Company Representative” shall mean each person at the time designated to act on behalf of the Company by written certificate furnished to the Authority and the Trustee containing the specimen signature of such person and signed on behalf of the Company by its President, any Vice President or its Treasurer, together with its Secretary or any Assistant Secretary.

Bond Counsel:

“Bond Counsel” shall mean any firm or firms of nationally recognized bond counsel experienced in matters pertaining to the validity of, and exclusion from gross income for federal tax purposes of interest on bonds issued by states and political subdivisions, selected by the Company and acceptable to the Authority.

Bond Fund:

“Bond Fund” shall mean the fund created by Section 4.01 hereof.

Bonds:

“Bond” or “Bonds” shall mean the bonds authorized to be issued under this Indenture.

Code:

“Code” shall mean the Internal Revenue Code of 1986, as amended from time to time. Each reference to a section of the Code herein shall be deemed to include the United States Treasury Regulations proposed or in effect thereunder and applicable to the Bonds or the use of proceeds thereof, unless the context clearly requires otherwise. References to any particular Code section shall, in the event of a successor to the Code, be deemed to be a reference to the successor to such Code section.

Company:

“Company” shall mean Tucson Electric Power Company, a corporation organized and existing under the laws of the State of Arizona, its successors and their assigns, including, without limitation, any successor obligor under Section 6.01 or 7.01 of the Loan Agreement to the extent of the obligations assumed thereunder.

3

Completion Date:

“Completion Date” shall mean the date specified in Section 3.05 of the Loan Agreement.

Construction (and other forms of the word “construct”):

“Construction” (and other forms of the word “construct”) shall mean, when used with respect to the Facilities, the construction of the Facilities and shall include, without limitation, the acquisition, construction, improvement and equipping of the Facilities, all as authorized by the Act.

Construction Fund:

“Construction Fund” shall mean the fund created by Section 5.01 hereof.

Cost of Construction:

“Cost of Construction” shall embrace all costs paid or incurred by the Company with respect to the Facilities and the financing thereof for the payment of which the Authority is authorized to issue bonds under the Act, and shall include without limitation: (a) obligations paid or incurred by the Company for labor, materials and other expenses and to contractors, builders and materialmen in connection with the construction of the Facilities; (b) the costs paid or incurred by the Company for contract bonds and for insurance of all kinds that may be deemed by the Company to be desirable or necessary during the course of construction of the Facilities; (c) the expenses paid or incurred by the Company for test borings, surveys, estimates, plans and specifications, and preliminary investigations therefor, with respect to the Facilities and for supervising construction, as well as for the performance of all other duties required by or reasonably necessary for the proper construction, of the Facilities; (d) Administration Expenses paid or incurred prior to the Completion Date and legal, accounting, financial, underwriting, advertising, recording and printing expenses and all other fees and expenses paid or incurred by the Company in connection with the issuance and sale of the Bonds; (e) amounts in respect of interest accruing upon the Bonds until the Completion Date; (f) all other costs that the Company shall be required to pay under the terms of any contract or contracts for the construction of the Facilities; and (g) any other costs or expenses paid or incurred by the Company, and any sums required to reimburse the Company for work done by it, with respect to the Facilities which are properly chargeable to the capital account of the Company with respect to the Facilities or would be so chargeable for federal income tax purposes either with a proper election or but for a proper election to deduct the same. For purposes of the application of the proceeds of the Bonds, the Cost of Construction shall be deemed to include the payment or redemption, or provision therefor, of any obligations, other than the Bonds, issued to finance or refinance any of the costs listed above. The Cost of Construction shall also be deemed to include all costs paid or incurred with respect to the Facilities by any Person to whom the Facilities have been leased or sold as a whole or in part, provided that such costs, had they been paid or incurred by the Company, would otherwise constitute a portion of the Cost of Construction.

Depositary:

“Depositary” shall mean The Depository Trust Company or any successor thereto as a securities repository for the Bonds.

4

Facilities:

“Facilities” shall mean the real and personal properties, machinery and equipment currently existing, under construction and to be constructed which are described in Exhibit A to the Loan Agreement, as revised from time to time to reflect any changes therein, additions thereto, substitutions therefor and deletions therefrom permitted by the terms of the Loan Agreement, subject, however, to the provisions of Section 7.01 of the Loan Agreement.

Government Obligations:

“Government Obligations” shall mean:

(a) direct obligations of, or obligations the principal of and interest on which are unconditionally guaranteed by, the United States of America entitled to the benefit of the full faith and credit thereof; and

(b) certificates, depositary receipts or other instruments which evidence a direct ownership interest in obligations described in clause (a) above or in any specific interest or principal payments due in respect thereof; provided, however, that the custodian of such obligations or specific interest or principal payments shall be a bank or trust company organized under the laws of the United States of America or of any state or territory thereof or of the District of Columbia, with a combined capital stock surplus and undivided profits of at least $50,000,000; and provided, further, that except as may be otherwise required by law, such custodian shall be obligated to pay to the holders of such certificates, depositary receipts or other instruments the full amount received by such custodian in respect of such obligations or specific payments and shall not be permitted to make any deduction therefrom.

Indenture:

“Indenture” shall mean this Indenture of Trust, dated as of October 1, 2010, between the Authority and the Trustee, and any and all modifications, alterations, amendments and supplements thereto.

Investment Securities:

“Investment Securities” shall mean any of the following obligations or securities on which neither the Company nor any of its subsidiaries is the obligor: (a) Government Obligations; (b) interest bearing deposit accounts (which may be represented by certificates of deposit) in national, state or foreign banks having a combined capital and surplus of not less than $100,000,000; (c) bankers’ acceptances drawn on and accepted by commercial banks having a combined capital and surplus of not less than $100,000,000; (d) (i) direct obligations of, (ii) obligations the principal of and interest on which are unconditionally guaranteed by, and (iii) any other obligations the interest on which is exempt from federal income taxation issued by, any state of the United States of America, the District of Columbia or the Commonwealth of Puerto Rico, or any political subdivision, agency, authority or other instrumentality of any of the foregoing, which, in any case, are rated by a nationally recognized rating agency in any of its three highest rating categories; (e) obligations of any agency or instrumentality of the United States of America; (f) commercial or finance company paper which is rated by a nationally recognized rating agency in any of its three highest rating categories; (g) corporate debt securities issued by corporations having debt securities rated by a nationally recognized rating agency in any of its three highest rating categories; (h) repurchase agreements with banking or financial institutions having a combined capital and surplus of not less than $100,000,000 with respect to any of the foregoing obligations or securities; (i) shares or interests in registered investment companies whose assets consist of obligations or securities which are described in any other clause of this sentence; and (j) any other obligations which may lawfully be purchased by the Trustee. The commercial banks and banking institutions referred to above may include the entities acting as Trustee hereunder if such entity shall otherwise satisfy the requirements set forth above.

5

Loan Agreement:

“Loan Agreement” shall mean the Loan Agreement, dated as of October 1, 2010, between the Authority and the Company relating to the Bonds, and any and all modifications, alterations, amendments and supplements thereto.

Loan Payments:

“Loan Payments” shall mean the payments required to be made by the Company pursuant to Section 5.01 of the Loan Agreement.

Notice by Mail or Electronic Means:

“Notice by Mail or Electronic Means” or “notice” of any action or condition “by Mail or Electronic Means” shall mean a written notice meeting the requirements of this Indenture mailed by first class mail to the Owners of specified registered Bonds at the addresses shown in the registration books maintained pursuant to Section 2.08 hereof or notice delivered by electronic means including, without limitation, email in PDF format.

Outstanding:

“Outstanding”, when used in reference to the Bonds, shall mean, as at any particular date, the aggregate of all Bonds authenticated and delivered under this Indenture except:

(a) those canceled by the Trustee at or prior to such date or delivered to or acquired by the Trustee at or prior to such date for cancellation;

(b) those deemed to be paid in accordance with ARTICLE VIII hereof; and

(c) those in lieu of or in exchange or substitution for which other Bonds shall have been authenticated and delivered pursuant to this Indenture, unless proof satisfactory to the Trustee and the Company is presented that such Bonds are held by a bona fide holder in due course.

Owner:

“Owner” shall mean the person in whose name any Bond is registered upon the registration books maintained pursuant to Section 2.08 hereof. The Company may be an Owner.

6

Person:

“Person” means (i) any corporation, limited liability company, partnership, joint venture, association, joint-stock company, business trust, or unincorporated organization, in each case formed or organized under the laws of the United States of America, any state thereof or the District of Columbia, or (ii) the United States of America or any state thereof, or any political subdivision of either thereof, or any agency, authority or other instrumentality of any of the foregoing.

Rebate Fund:

“Rebate Fund” shall mean the fund created by Section 7.08 hereof.

Receipts and Revenues of the Authority from the Loan Agreement:

“Receipts and Revenues of the Authority from the Loan Agreement” shall mean all moneys paid or payable to the Trustee for the account of the Authority by the Company in respect of the Loan Payments and payments pursuant to Section 9.01 of the Loan Agreement and all receipts of the Trustee which, under the provisions of this Indenture, reduce the amount of such payments.

Record Date:

“Record Date” shall mean the close of business on the fifteenth (15th) day of the calendar month immediately preceding each regularly scheduled interest payment date.

Supplemental Indenture:

“Supplemental Indenture” shall mean any indenture of the Authority modifying, altering, amending, supplementing or confirming this Indenture for any purpose, in accordance with the terms hereof.

Supplemental Loan Agreement:

“Supplemental Loan Agreement” shall mean any agreement between the Authority and the Company modifying, altering, amending or supplementing the Loan Agreement, in accordance with the terms thereof and hereof.

Tax Agreement:

“Tax Agreement” shall mean that tax certificate and agreement, dated the date of the initial authentication and delivery of the Bonds, between the Authority and the Company, relating to the requirements of the Code, and any and all modifications, alterations, amendments and supplements thereto.

7

Trust Estate:

“Trust Estate” shall mean at any particular time all right, title and interest of the Authority in and to the Loan Agreement (except its rights under Sections 5.03, 5.04, 6.03 and 8.05 thereof and any rights of the Authority to receive notices, certificates, requests, requisitions and other communications thereunder), including without limitation, the Receipts and Revenues of the Authority from the Loan Agreement, the Bond Fund and the Construction Fund and all moneys and Investment Securities from time to time on deposit therein (excluding, however, any moneys or Investment Securities held in the Rebate Fund), any and all other moneys and obligations (other than Bonds) which at such time are deposited or are required to be deposited with, or are held or are required to be held by or on behalf of, the Trustee, in trust under any of the provisions of this Indenture and all other rights, titles and interests which at such time are subject to the lien of this Indenture; provided, however, that in no event shall there be included in the Trust Estate (a) moneys or obligations deposited with or held by the Trustee in the Rebate Fund pursuant to Section 7.08 hereof or (b) moneys or obligations deposited with or paid to the Trustee for the redemption or payment of Bonds which are deemed to have been paid in accordance with ARTICLE VIII hereof or moneys held pursuant to Section 4.06 hereof.

Trustee; Principal Office thereof:

“Trustee” shall mean U.S. Bank Trust National Association, as trustee under this Indenture, its successors in trust and their assigns. “Principal Office” of the Trustee shall mean the principal corporate trust office of the Trustee, which office at the date of acceptance by the Trustee of the duties and obligations imposed on the Trustee by this Indenture is located at the address specified in Section 13.08 hereof.

ARTICLE II

THE BONDS

Section 2.01 Creation of Bonds. There is hereby authorized and created under this Indenture, for the purpose of providing moneys to pay a part of the Cost of Construction, an issue of Bonds, entitled to the benefit, protection and security of this Indenture, in the aggregate principal amount of ONE HUNDRED MILLION DOLLARS ($100,000,000). Each of the Bonds shall be designated by the title “The Industrial Development Authority of the County of Pima Industrial Development Revenue Bond, 2010 Series A (Tucson Electric Power Company Project)”. The Bonds shall mature, subject to prior redemption upon the terms and conditions hereinafter set forth, on October 1, 2040 and shall bear interest from the date thereof until payment of the principal or redemption price thereof shall have been made or provided for in accordance with the provisions hereof, whether at maturity, upon redemption or otherwise, at the rate of FIVE POINT TWO FIVE PER CENTUM (5.25%) per annum, with interest thereon payable semi-annually on each April 1 and October 1, commencing April 1, 2011. Interest shall be calculated on the basis of a 360-day year consisting of twelve 30-day months.

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Section 2.02 Form of Bonds. Bonds shall be authenticated and delivered hereunder solely as fully registered bonds without coupons in the denomination of $5,000 or integral multiples thereof. Bonds shall be numbered as determined by the Trustee. Bonds authenticated prior to the first interest payment date shall be dated their date of original issuance. Bonds authenticated on or subsequent to the first interest payment date shall be dated the interest payment date next preceding the date of authentication thereof, unless such date of authentication shall be an interest payment date to which interest on the Bonds has been paid in full or duly provided for, in which case they shall be dated such date of authentication; provided, however, that if, as shown by the records of the Trustee, interest on the Bonds shall be in default, Bonds issued in exchange for Bonds surrendered for transfer or exchange shall be dated the date to which interest has been paid in full on the Bonds surrendered.

Principal of the Bonds shall be payable to the Owners of such Bonds upon presentation and surrender of such Bonds at the Principal Office of the Trustee. Interest on the Bonds shall be paid by check drawn upon the Trustee and mailed to the Owners of such Bonds as of the close of business on the Record Date with respect to each interest payment date at the registered addresses of such Owners as they shall appear as of the close of business on such Record Date on the registration books maintained pursuant to Section 2.08 hereof notwithstanding the cancellation of any such Bond upon any exchange or registration of transfer subsequent to such Record Date, except that if and to the extent that there should be a default on the payment of interest on any Bond, such defaulted interest shall be paid to the Owners in whose name such Bond (or any Bond or Bonds issued upon any exchange or registration of transfer thereof) is registered as of the close of business on a date selected by the Trustee in its discretion, but not more than fifteen (15) days or less than ten (10) days prior to the date of payment of such defaulted interest; notwithstanding the foregoing, upon request to the Trustee by an Owner of not less than $1,000,000 in aggregate principal amount of Bonds, interest on such Bonds and, after presentation and surrender of such Bonds, the principal thereof shall be paid to such Owner by wire transfer to the account maintained within the continental United States specified by such Owner or, if such Owner maintains an account with the entity acting as Trustee, by deposit into such account. Payment as aforesaid shall be made in such coin or currency of the United States of America as, at the respective times of payment, shall be legal tender for the payment of public and private debts.

The Bonds and the form for registration of transfer and the form of certificate of authentication to be printed on the Bonds are to be in substantially the forms thereof set forth in Exhibits A, B and C hereto, respectively, with necessary or appropriate variations, omissions and insertions as permitted or required by this Indenture.

Section 2.03 Execution of Bonds. The Bonds shall be executed on behalf of the Authority by the President or a Vice President of the Authority and shall be attested by the Secretary or an Assistant Secretary of the Authority. Each of the foregoing officers may execute or cause to be executed with a facsimile signature in lieu of a manual signature the Bonds, provided the signature of either the President or a Vice President of the Authority or the Secretary or Assistant Secretary of the Authority shall, if required by applicable laws, be manually subscribed.

In case any officer of the Authority whose signature or a facsimile of whose signature shall appear on the Bonds shall cease to be such officer before the authentication by the Trustee and delivery of such Bonds, such signature or such facsimile shall nevertheless be valid and sufficient for all purposes, the same as if such officer had remained in office until delivery; and any Bond may be signed on behalf of the Authority by such persons as, at the time of execution of such Bond, shall be the proper officers of the Authority, even though at the date of such Bond or of the execution and delivery of this Indenture any such person was not such officer.

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Section 2.04 Authentication of Bonds. Only such Bonds as shall have endorsed thereon a certificate of authentication substantially in the form set forth in Exhibit C hereto duly executed by the Trustee shall be entitled to any right or benefit under this Indenture. No Bond shall be valid or obligatory for any purpose unless and until such certificate of authentication shall have been duly executed by the Trustee, and such executed certificate of authentication of the Trustee upon any such Bonds shall be conclusive evidence that such Bond has been authenticated and delivered under this Indenture. The Trustee’s certificate of authentication on any Bond shall be deemed to have been executed by it if signed with an authorized signature of the Trustee, but it shall not be necessary that the same person sign the certificate of authentication on all of the Bonds issued hereunder. This Section 2.04 is subject to the provisions of Section 10.17 hereof.

Section 2.05 Bonds Not General Obligations. Neither Pima County, Arizona nor the State of Arizona shall in any event be liable for the payment of the principal of or premium, if any, or interest on the Bonds, and neither the Bonds nor the premium, if any, or the interest thereon, shall be construed to constitute an indebtedness of Pima County, Arizona or the State of Arizona within the meaning of any constitutional or statutory provisions whatsoever. The Bonds and the premium, if any, and the interest thereon shall be limited obligations of the Authority payable solely from the Receipts and Revenues of the Authority from the Loan Agreement and the other moneys pledged therefor under this Indenture, and such fact shall be plainly stated on each Bond.

Section 2.06 Prerequisites to Authentication of Bonds. The Authority shall execute and deliver to the Trustee and the Trustee shall authenticate the Bonds and deliver said Bonds to the initial purchasers thereof as may be directed hereinafter in this Section 2.06.

Prior to the delivery on original issuance by the Trustee of any authenticated Bonds, there shall be or have been delivered to the Trustee:

(a) a duly certified copy of a resolution of the Board of Directors of the Authority authorizing the execution and delivery of this Indenture and the Loan Agreement and the issuance of the Bonds;

(b) an original duly executed counterpart or a duly certified copy of the Loan Agreement;

(c) a request and authorization to the Trustee on behalf of the Authority, signed by any duly authorized officer of the Authority, to authenticate and deliver the Bonds in the aggregate principal amount determined by this Indenture to the purchaser or purchasers therein identified upon payment to the Trustee, but for the account of the Authority, of a sum specified in such request and authorization; and

(b) a written statement on behalf of the Company, executed by the President, any Vice President or the Treasurer, (i) approving the issuance and delivery of the Bonds and (ii) consenting to each and every provision of this Indenture.

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Section 2.07 Lost or Destroyed Bonds or Bonds Canceled in Error. If any Bond, whether in temporary or definitive form, is lost (whether by reason of theft or otherwise), destroyed (whether by mutilation, damage, in whole or in part, or otherwise) or canceled in error, the Authority may execute and the Trustee may authenticate a new Bond of like date and denomination and bearing a number not contemporaneously outstanding; provided that (a) in the case of any mutilated Bond, such mutilated Bond shall first be surrendered to the Trustee and (b) in the case of any lost Bond or Bond destroyed in whole, there shall be first furnished to the Authority, the Trustee and the Company evidence of such loss or destruction. In every case, the applicant for a substitute Bond shall furnish the Authority, the Trustee and the Company such security or indemnity as may be required by any of them. In the event any lost or destroyed Bond or a Bond canceled in error shall have matured or is about to mature, or has been called for redemption, instead of issuing a substitute Bond the Trustee may, in its discretion, pay the same without surrender thereof if there shall be first furnished to the Authority, the Trustee and the Company evidence of such loss, destruction or cancellation, together with indemnity, satisfactory to them. Upon the issuance of any substitute Bond, the Authority and the Trustee may require the payment of a sum sufficient to cover any tax or other governmental charge that may be imposed in relation thereto. The Trustee may charge the Owner of any such Bond with the Trustee’s reasonable fees and expenses in connection with any transaction described in this Section 2.07.

Every substitute Bond issued pursuant to the provisions of this Section 2.07 by virtue of the fact that any Bond is lost, destroyed or canceled in error shall constitute an additional contractual obligation of the Authority, whether or not the Bond so lost, destroyed or canceled shall be at any time enforceable, and shall be entitled to all the benefits of this Indenture equally and proportionately with any and all other Bonds duly issued hereunder. All Bonds shall be held and owned upon the express condition that, to the extent permitted by law, the foregoing provisions are exclusive with respect to the replacement or payment of lost, destroyed or improperly canceled Bonds, notwithstanding any law or statute now existing or hereafter enacted.

Section 2.08 Transfer, Registration and Exchange of Bonds. The Trustee shall maintain and keep, at its Principal Office, books for the registration and registration of transfer of Bonds, which, at all reasonable times, shall be open for inspection by the Authority and the Company; and, upon presentation for such purpose of any Bond entitled to registration or registration of transfer at the Principal Office of the Trustee, the Trustee shall register or register the transfer in such books, under such reasonable regulations as the Trustee may prescribe. The Trustee shall make all necessary provisions to permit the exchange or registration of transfer of Bonds at its Principal Office.

The transfer of any Bond shall be registered upon the registration books of the Trustee at the written request of the Owner thereof or his attorney duly authorized in writing, upon surrender thereof at the Principal Office of the Trustee, together with a written instrument of transfer satisfactory to the Trustee duly executed by the Owner or his duly authorized attorney. Upon the registration of transfer of any such Bond or Bonds, the Authority shall issue in the name of the transferee, in authorized denominations, a new Bond or Bonds in the same aggregate principal amount as the surrendered Bond or Bonds.

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The Authority and the Trustee may deem and treat the Owner of any Bond as the absolute owner of such Bond, whether such Bond shall be overdue or not, for the purpose of receiving payment of, or on account of, the principal of and, except as provided in Section 2.02 hereof, interest on, such Bond and for all other purposes, and neither the Authority nor the Trustee shall be affected by any notice to the contrary. All such payments so made to any such Owner or upon his order shall be valid and effective to satisfy and discharge the liability upon such Bond to the extent of the sum or sums so paid.

Bonds, upon surrender thereof at the Principal Office of the Trustee may, at the option of the Owner thereof, be exchanged for an equal aggregate principal amount of Bonds of any authorized denomination.

In all cases in which the privilege of exchanging Bonds or registering the transfer of Bonds is exercised, the Authority shall execute and the Trustee shall authenticate and deliver Bonds in accordance with the provisions of this Indenture. For every such exchange or registration of transfer of Bonds, whether temporary or definitive, the Authority or the Trustee may make a charge sufficient to reimburse it for any tax or other governmental charge required to be paid with respect to such exchange or registration of transfer, which sum or sums shall be paid by the person requesting such exchange or registration of transfer as a condition precedent to the exercise of the privilege of making such exchange or registration of transfer. The Trustee shall not be obligated (a) to make any such exchange or registration of transfer of Bonds during the fifteen (15) days next preceding the date on which notice of any proposed redemption of Bonds is given or (b) to make any exchange or registration of transfer of any Bonds called for redemption.

The Bonds are to be initially registered in the name of Cede & Co., as nominee for the Depositary. Such Bonds shall not be transferable or exchangeable, nor shall any purported transfer be registered, except as follows:

(a) such Bonds may be transferred in whole, and appropriate registration of transfer effected, if such transfer is by such nominee to the Depositary, or by the Depositary to another nominee thereof, or by any nominee of the Depositary to any other nominee thereof, or by the Depositary or any nominee thereof to any successor securities depositary or any nominee thereof; and

(b) such Bond may be exchanged for definitive Bonds registered in the respective names of the beneficial holders thereof, and thereafter shall be transferable without restriction, if:

(i) the Depositary shall have notified the Company and the Trustee that it is unwilling or unable to continue to act as securities depositary with respect to such Bonds and the Trustee shall not have been notified by the Company within ninety (90) days of the identity of a successor securities depositary with respect to such Bonds;

(ii) the Company shall have delivered to the Trustee a written instrument to the effect that such Bonds shall be so exchangeable on and after a date specified therein; or

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(iii) (1) an Event of Default shall have occurred and be continuing, (2) the Trustee shall have given notice of such Event of Default pursuant to Section 10.19 hereof and (3) there shall have been delivered to the Authority, the Company and the Trustee an opinion of counsel to the effect that the interests of the beneficial owners of such Bonds in respect thereof will be materially impaired unless such owners become owners of definitive Bonds.

The Bonds delivered to the Depositary may contain a legend reflecting the foregoing restrictions on registration of transfer and exchange.

Section 2.09 Other Obligations. The Authority expressly reserves the right to issue, to the extent permitted by law, but shall not be obligated to issue, obligations under another indenture or indentures to provide additional funds to pay the Cost of Construction of the Facilities or to refund all or any principal amount of the Bonds, or any combination thereof.

Section 2.10 Temporary Bonds. Pending the preparation of definitive Bonds, the Authority may execute and the Trustee shall authenticate and deliver temporary Bonds. Temporary Bonds shall be issuable as registered Bonds without coupons, of any authorized denomination, and substantially in the form of the definitive Bonds but with such omissions, insertions and variations as may be appropriate for temporary Bonds, all as may be determined by the Authority. Temporary Bonds may contain such reference to any provisions of this Indenture as may be appropriate. Every temporary Bond shall be executed by the Authority and be authenticated by the Trustee upon the same conditions and in substantially the same manner, and with like effect, as the definitive Bonds. As promptly as practicable the Authority shall execute and shall furnish definitive Bonds and thereupon temporary Bonds may be surrendered in exchange therefor without charge at the Principal Office of the Trustee, and the Trustee shall authenticate and deliver in exchange for such temporary Bonds a like aggregate principal amount of definitive Bonds of authorized denominations. Until so exchanged the temporary Bonds shall be entitled to the same benefits under this Indenture as definitive Bonds.

Section 2.11 Cancellation of Bonds. All Bonds which shall have been surrendered to the Trustee for payment or redemption, and all Bonds which shall have been surrendered to the Trustee for exchange or registration of transfer, shall be delivered to the Trustee for cancellation. All Bonds delivered to or acquired by the Trustee for cancellation shall be canceled and destroyed by the Trustee. The Trustee shall furnish to the Authority and the Company counterparts of certificates evidencing such cancellation and destruction and specifying such Bonds by number.

Section 2.12 Payment of Principal and Interest. For the payment of interest on the Bonds, the Authority shall cause to be deposited in the Bond Fund, on each interest payment date, solely out of the Receipts and Revenues of the Authority from the Loan Agreement and other moneys pledged therefor, an amount sufficient to pay the interest to become due on such interest payment date. The obligation of the Authority to cause any such deposit to be made hereunder shall be reduced by the amount of moneys in the Bond Fund available on such interest payment date for the payment of interest on the Bonds.

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For the payment of the principal of the Bonds upon maturity, the Authority shall cause to be deposited in the Bond Fund, on the stated or accelerated date of maturity, solely out of the Receipts and Revenues of the Authority from the Loan Agreement and other moneys pledged therefor, an amount sufficient to pay the principal of the Bonds. The obligation of the Authority to cause any such deposit to be made hereunder shall be reduced by the amount of moneys in the Bond Fund available on the maturity date for the payment of the principal of the Bonds.

Section 2.13 Applicability of Book-Entry Provisions. Anything in this Indenture to the contrary notwithstanding, (a) the provisions of the Blanket Issuer Letter of Representations, dated February 26, 1996, between the Authority and The Depository Trust Company relating to the manner of and procedures for payment and redemption of Bonds and related matters shall apply so long as such Depositary shall be the Owner of all Outstanding Bonds and (b) the Authority and the Trustee, as applicable, may enter into a similar agreement, on terms satisfactory to the Company, with any subsequent Depositary and the provisions thereof shall apply so long as such Depositary shall be the Owner of all Outstanding Bonds.

ARTICLE III

REDEMPTION OF BONDS

Section 3.01 Redemption Provisions. (a) The Bonds shall be subject to redemption by the Authority, at the direction of the Company, on any date on or after October 1, 2020 in whole at any time or in part from time to time, at 100% of the principal amount thereof plus accrued interest, if any, to the redemption date.

(b) The Bonds shall be subject to redemption by the Authority, at the direction of the Company, in whole at any time at 100% of the principal amount thereof plus accrued interest, if any, to the redemption date, if:

(i) the Company shall have determined that the continued operation of the Facilities is impracticable, uneconomical or undesirable for any reason;

(ii) all or substantially all of the Facilities shall have been condemned or taken by eminent domain; or

(iii) the operation of the Facilities shall have been enjoined or shall have otherwise been prohibited by, or shall conflict with, any order, decree, rule or regulation of any court or of any federal, state or local regulatory body, administrative agency or other governmental body.

(c) The Bonds shall be subject to mandatory redemption by the Authority, at 100% of the principal amount thereof plus accrued interest to the redemption date, on the 180th day (or such earlier date as may be designated by the Company) after a final determination by a court of competent jurisdiction or an administrative agency, to the effect that, as a result of a failure by the Company to perform or observe any covenant, agreement or representation contained in the Loan Agreement, the interest payable on the Bonds is included for federal income tax purposes in the gross income of the owners thereof, other than any owner of a Bond who

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is a “substantial user” of the Facilities or a “related person” within the meaning of Section 147(a) of the Code. No determination by any court or administrative agency shall be considered final for the purposes of this Section 3.01(c) unless the Company shall have been given timely notice of the proceeding which resulted in such determination and an opportunity to participate in such proceeding, either directly or through an owner of a Bond, and until the conclusion of any appellate review sought by any party to such proceeding or the expiration of the time for seeking such review. The Bonds shall be redeemed either in whole or in part in such principal amount that, in the opinion of Bond Counsel, the interest payable on the Bonds, including the Bonds remaining outstanding after such redemption, would not be included in the gross income of any owner thereof, other than an owner of a Bond who is a “substantial user” of the Facilities or a “related person” within the meaning of Section 147(a) of the Code.

(d) In the event that the aggregate of the amounts deposited pursuant to Section 5.02 hereof into the Bond Fund, together with any income or other gain from the investment thereof, shall at any time, or from time to time, be equal to or greater than $5,000, but only to the extent that such amounts are required under Section 4.04(b) hereof to be applied to the redemption of Bonds, the Authority shall redeem Bonds, at the principal amount thereof plus accrued interest to the redemption date, in the largest aggregate principal amount which does not exceed the amount of such deposit or deposits, together with such income or gain, on the next interest payment date on which a redemption may be made in accordance with the provisions of Section 3.03(a) or Section 3.03(b) hereof and on which Bonds, in such amount, are otherwise redeemable at the principal amount thereof under subsection (a) or (b) of this Section 3.01.

Section 3.02 Selection of Bonds to be Redeemed. If less than all the Bonds shall be called for redemption under any provision of this Indenture permitting such partial redemption, the particular Bonds or portions of Bonds to be redeemed shall be selected by the Trustee, in such manner as the Trustee in its discretion may deem proper, in the aggregate principal amount designated to the Trustee by the Company or otherwise as required by this Indenture; provided, however, that if, as indicated in a certificate of an Authorized Company Representative delivered to the Trustee, the Company shall have offered to purchase all Bonds then Outstanding and less than all such Bonds have been tendered to the Company for such purchase, the Trustee, at the direction of an Authorized Company Representative, shall select for redemption all such Bonds which shall not have been so tendered; and provided, further, that the portion of any Bond to be redeemed shall be in the principal amount of $5,000 or some integral multiple thereof and that, in selecting Bonds for redemption, the Trustee shall treat each Bond as representing that number of Bonds which is obtained by dividing the principal amount of such Bond by $5,000. If it is determined that one or more, but not all, of the $5,000 units of principal amount represented by any such Bond is to be called for redemption, then, upon notice of intention to redeem such $5,000 unit or units, the Owner of such Bond shall forthwith surrender such Bond to the Trustee for (y) payment to such Owner of the redemption price (including the redemption premium, if any, and accrued interest to the date fixed for redemption) of the $5,000 unit or units of principal amount called for redemption and (z) delivery to such Owner of a new Bond or Bonds in the aggregate principal amount of the unredeemed balance of the principal amount of any such Bond. Bonds representing the unredeemed balance of the principal amount of any such Bond shall be delivered to the Owner thereof, without charge therefor. If the Owner of any such Bond of a denomination greater than $5,000 shall fail to present such Bond to the Trustee for payment and exchange as aforesaid, such Bond shall, nevertheless, become due and payable on the date fixed for redemption to the extent of the $5,000 unit or units of principal amount called for redemption (and to that extent only).

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Section 3.03 Procedure for Redemption. (a) In the event any of the Bonds are called for redemption, the Trustee shall give notice, in the name of the Authority, of the redemption of such Bonds, which notice shall (i) specify the Bonds to be redeemed, the redemption date, the redemption price, and the place or places where amounts due upon such redemption will be payable (which shall be the Principal Office of the Trustee) and, if less than all of the Bonds are to be redeemed, the numbers assigned to the Bonds to be redeemed, if any, and the portion of the principal amount of any Bond to be redeemed in part, (ii) state any condition to such redemption and (iii) state that on the redemption date, and upon the satisfaction of any such condition, the Bonds or portions thereof to be redeemed shall cease to bear interest. Such notice may set forth any additional information relating to such redemption. Such notice shall be given by Mail or Electronic Means at least twenty (20) days prior to the date fixed for redemption to the Owners of the Bonds to be redeemed; provided, however, that failure duly to give such Notice by Mail or Electronic Means, or any defect therein, shall not affect the validity of any proceedings for the redemption of Bonds as to which there shall have been no such failure or defect. If a notice of redemption shall be unconditional, or if the conditions of a conditional notice or redemption shall have been satisfied, then upon presentation and surrender of Bonds so called for redemption at the place or places of payment, such Bonds shall be redeemed. The Trustee shall promptly deliver to the Company a copy of each such notice of redemption.

(b) With respect to any notice of redemption of Bonds in accordance with subsection (a) or (b) of Section 3.01 hereof, unless, upon the giving of such notice, such Bonds shall be deemed to have been paid within the meaning of ARTICLE VIII hereof, such notice shall state that such redemption shall be conditional upon the receipt, by the Trustee at or prior to the opening of business on the date fixed for such redemption, of moneys sufficient to pay the principal of and interest on such Bonds to be redeemed, and that if such moneys shall not have been so received said notice shall be of no force and effect and the Authority shall not be required to redeem such Bonds and such failure to redeem shall not constitute an event of default hereunder. In the event that such notice of redemption contains such a condition and such moneys are not so received or any other condition specified in the notice of redemption shall not have been met, the redemption shall not be made and the Trustee shall within a reasonable time thereafter give notice, in the manner in which the notice of redemption was given, that such moneys were not so received.

(c) Any Bonds and portions of Bonds which have been duly selected for redemption shall cease to bear interest on the specified redemption date provided that moneys sufficient to pay the principal of and interest on such Bonds shall be on deposit with the Trustee on the date fixed for redemption so that such Bonds will be deemed to be paid in accordance with ARTICLE VIII hereof.

(d) Any notice of redemption delivered pursuant to Section 3.01(a) hereof may be revoked by the Company by written notice delivered to the Trustee by the Company not less than two (2) business days prior to the redemption date.

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Section 3.04 Payment of Redemption Price. For the redemption of any of the Bonds, the Authority shall cause to be deposited in the Bond Fund, on the redemption date, solely out of the Receipts and Revenues of the Authority from the Loan Agreement, an amount sufficient to pay the principal of and interest to become due on such redemption date. The obligation of the Authority to cause any such deposit to be made hereunder shall be reduced by the amount of moneys in the Bond Fund available on such redemption date for payment of the principal of and accrued interest on the Bonds to be redeemed.

Section 3.05 No Partial Redemption After Default. Anything in this Indenture to the contrary notwithstanding, if there shall have occurred and be continuing an Event of Default defined in clause (a) or (b) of the first paragraph of Section 9.01 hereof, there shall be no redemption of less than all of the Bonds at the time Outstanding other than a partial redemption in connection with an offer by the Company to purchase all Bonds Outstanding as contemplated in the first proviso to the first sentence of Section 3.02 hereof.

ARTICLE IV

THE BOND FUND

Section 4.01 Creation of Bond Fund. There is hereby created and established with the Trustee a trust fund in the name of the Authority to be designated “The Industrial Development Authority of The County of Pima Industrial Development Revenue Bonds, 2010 Series A (Tucson Electric Power Company Project) Bond Fund.” The Trustee shall establish and maintain within the Bond Fund such segregated subaccounts as may be requested by an Authorized Company Representative. The Bond Fund, and all moneys and certificated securities therein, shall be kept in the possession of the Trustee.

Section 4.02 Liens. The Authority shall not create any lien upon the Bond Fund or upon the Receipts and Revenues of the Authority from the Loan Agreement other than the lien hereby created.

Section 4.03 Deposits into Bond Fund. (a) There shall be deposited into the Bond Fund:

(i) all amounts required to be deposited into the Bond Fund by Section 5.02 hereof;

(ii) all amounts required to be deposited into the Bond Fund by Section 5.03 and Section 5.04 hereof;

(iii) all Loan Payments; and

(iv) all other moneys received by the Trustee under and pursuant to any provision of the Loan Agreement, other than Sections 5.03, 5.04 and 8.05 thereof, or from any other source when accompanied by directions by the Company that such moneys are to be paid into the Bond Fund, such moneys to be deposited into the account specified by such provision of the Loan Agreement or by such directions, or, if no specification is made, into the General Account.

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(b) All income or other gain from the investment of moneys in the Bond Fund shall be retained therein.

Section 4.04 Use of Moneys in Bond Fund.

(a) Except as otherwise provided in Section 4.06, Section 9.01 and Section 10.04, all moneys in the Bond Fund constituting part of the Trust Estate shall be used solely for the payment of the principal of and interest on the Bonds as the same shall become due and payable at maturity, upon redemption or otherwise.

(b) Moneys deposited pursuant to Section 5.02 hereof, and any income or other gain from the investment thereof, shall be applied by the Trustee (i) in whole or in part (A) to the purchase of Bonds in such amounts, at such prices, at such times and otherwise as directed by an Authorized Company Representative, or to the redemption, at the direction of the Company, of Bonds pursuant to subsection (a) or, if applicable, (b) or (d) of Section 3.01 hereof or (B) in any other manner directed by an Authorized Company Representative which, as indicated in an opinion of Bond Counsel furnished by the Company to the Authority and the Trustee, will not, in and of itself, impair the validity under the Act of the Bonds or the exclusion of the interest on the Bonds from gross income for federal income tax purposes, or, in the absence of any such purchase, redemption or direction on or prior to the forty-fifth (45th) day prior to the first interest payment date specified in Section 3.01(d) hereof, (ii) to the payment of principal upon the redemption, from time to time, of Bonds pursuant to Section 3.01(d) hereof, any moneys which are not so applied to be retained and applied by the Trustee to the payment of principal of Bonds either at maturity or upon the redemption of all or any portion of the Bonds, whichever occurs first. Pending the application of moneys deposited into the Bond Fund pursuant to Section 5.02 hereof, such moneys may be invested in Investment Securities in the manner permitted by Section 6.01 hereof and in accordance with the provisions of the Tax Agreement.

Section 4.05 Custody of Bond Fund; Withdrawal of Moneys. The Bond Fund shall be in the custody of the Trustee but in the name of the Authority and the Authority hereby authorizes and directs the Trustee to withdraw from the Bond Fund funds constituting part of the Trust Estate sufficient to pay the principal of and interest on the Bonds as the same shall become due and payable, and to withdraw from the Bond Fund funds sufficient to pay any other amounts payable therefrom as the same shall become due and payable.

Section 4.06 Bonds Not Presented for Payment. In the event any Bonds shall not be presented for payment when the principal thereof becomes due, either at maturity or at the date fixed for redemption thereof or otherwise, if moneys sufficient to pay such Bonds are held by the Trustee for the benefit of the Owners thereof, the Trustee shall segregate and hold such moneys in trust, without liability for interest thereon, for the benefit of the Owners of such Bonds, who shall, except as provided in the following paragraph, thereafter be restricted exclusively to such fund or funds for the satisfaction of any claim of whatever nature on their part under this Indenture or relating to said Bonds.

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Any moneys which the Trustee shall segregate and hold in trust for the payment of the principal of or interest on any Bond and remaining unclaimed for one (1) year after such principal or interest has become due and payable shall be paid to the Company; provided, however, that before the Trustee shall be required to make any such repayment, the Trustee shall, at the expense of the Company, cause notice to be given by Mail or Electronic Means to the effect that such money remains unclaimed and that, after a date specified therein, which shall not be less than thirty (30) days from the date of such notice by Mail or Electronic Means, any unclaimed balance of such moneys then remaining will be paid to the Company. After the payment of such unclaimed moneys to the Company, the Owner of such Bond shall thereafter look only to the Company for the payment thereof, and all liability of the Authority and the Trustee with respect to such moneys shall thereupon cease.

Section 4.07 Moneys Held in Trust. All moneys and Investment Securities held by the Trustee in the Bond Fund, and all moneys required to be deposited with or paid to the Trustee for deposit into the Bond Fund, and all moneys withdrawn from the Bond Fund and held by the Trustee, shall be held by the Trustee, in trust, and such moneys and Investment Securities (other than moneys held pursuant to Section 4.06 hereof and moneys or Investment Securities held in the Rebate Fund established in furtherance of the obligations of the Company under clause (b) of Section 6.04 of the Loan Agreement), while so held or so required to be deposited or paid, shall constitute part of the Trust Estate and be subject to the lien and security interest created hereby in favor of the Trustee, for the benefit of the Owners from time to time of the Bonds. The Company shall have no right, title or interest in the Bond Fund, except such rights as may arise after the right, title and interest of the Trustee in and to the Trust Estate and all covenants, agreements and other obligations of the Authority under this Indenture shall have ceased, terminated and become void and shall have been satisfied and discharged in accordance with ARTICLE VIII hereof.

ARTICLE V

THE CONSTRUCTION FUND

Section 5.01 Creation of, and Disbursements from, Construction Fund.

(a) There is hereby created and established with the Trustee a trust fund in the name of the Authority to be designated “The Industrial Development Authority of the County of Pima Industrial Development Revenue Bonds, 2010 Series A (Tucson Electric Power Company Project) Construction Fund”. The Trustee shall establish and maintain any subaccount within the Construction Fund which may be requested by an Authorized Company Representative. The Construction Fund, and all moneys and certificated securities therein, shall be kept in the possession of the Trustee. The Authority shall not create any lien upon the Construction Fund other than the lien hereby created.

(b) The proceeds from the issuance and sale of the Bonds shall be deposited into the Construction Fund. All income or other gain from the investment of moneys in the Construction Fund shall be retained in the Construction Fund.

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(c) The Trustee is hereby authorized and directed to disburse moneys in the Construction Fund to or upon the order of the Company from time to time upon receipt by the Trustee of requisitions substantially in the form of Exhibit D attached hereto executed by, or communications by e-mail in PDF format or facsimile transmission from, an Authorized Company Representative, which requisitions or communications shall state with respect to each payment to be made: (i) the requisition number, (ii) the name and address of the person, firm or corporation to whom payment is due or has been made (or, in the case of payments to the Bond Fund, instructions to make such payments thereto), (iii) the amount paid or to be paid, (iv) (A) that each obligation, item of cost or expense with respect to which such requisition is being made has been properly incurred and has been paid or is then due and payable as an item of the Cost of Construction, is a proper charge against the Construction Fund, and has not been the basis of any previous final payment therefrom or from the proceeds of any other obligations issued by the Authority or (B) in the event that a portion of the Bonds shall have been paid, redeemed or deemed to have been paid within the meaning of ARTICLE VIII hereof by reason of the application of the proceeds of the sale of any obligations issued under an indenture other than this Indenture and if the payment of such requisition is to be made into the construction, acquisition or other similar fund created under such other indenture, that upon disbursement from such construction, acquisition or other similar fund, each obligation, item of cost or expense mentioned in the requisition for such disbursement shall have been properly incurred and shall have been paid or will then be due and payable as an item of the Cost of Construction, (v) that the payment of such requisition will not result in a breach of any of the covenants of the Company contained in Section 4.04 (c) or (d) of the Loan Agreement and (vi) that, to the best of the knowledge of such Authorized Company Representative, there shall not have occurred and be continuing any event of default under the Loan Agreement. In Section 4.04 of the Loan Agreement the Company has agreed that any such communication by e-mail or facsimile transmission shall be promptly confirmed by a requisition, substantially in the form of Exhibit D hereto, executed by an Authorized Company Representative.

(d) In paying any requisition under this Section 5.01, the Trustee shall be entitled to conclusively rely as to the completeness and accuracy of all statements in such requisition upon the approval of such requisition by an Authorized Company Representative, execution thereof to be conclusive evidence of such approval, and the Company has by the provisions of the Loan Agreement covenanted and agreed to indemnify and save harmless the Trustee from any liability incurred in connection with the payment of any requisition so executed by an Authorized Company Representative.

The Trustee shall keep and maintain adequate records pertaining to the Construction Fund and all disbursements therefrom and, upon receipt of a certificate furnished pursuant to Section 3.05 or Section 3.09(b) of the Loan Agreement, the Trustee shall, if requested in writing by the Authority or the Company, file an accounting thereof with the Authority and with the Company.

Section 5.02 Completion of Facilities; Termination of Construction. Upon receipt by the Trustee of a certificate furnished pursuant to Section 3.05 or Section 3.09(b) of the Loan Agreement, any balance remaining in the Construction Fund (other than amounts retained by the Trustee at the direction of the Company pursuant to Section 3.05 or 3.09 of the Loan Agreement or in furtherance of the covenant of the Company contained in clause (b) of Section 6.04 of the Loan Agreement) shall (a) be applied in whole or in part (i) to the purchase of Bonds in such amounts, at such prices, at such times and otherwise as directed by an Authorized Company Representative, or (ii) in any other manner directed by the Company which, as indicated in an opinion of Bond Counsel

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furnished by the Company to the Authority and the Trustee, will not impair the validity under the Act of the Bonds or the exclusion of the interest on the Bonds from gross income for federal income tax purposes or (b) in the absence of any such purchase or direction within sixty (60) days of the receipt by the Trustee of such certificate (or such shorter period as the Company shall direct), be deposited by the Trustee into the Bond Fund. From time to time as the proper disposition of the amounts retained by the Trustee in the Construction Fund as aforesaid shall be determined, to the extent that such amounts are not paid out in full by the Trustee pursuant to Section 5.01 or Section 6.01 hereof, the Company shall so notify the Trustee and the Authority by one or more certificates as aforesaid and any amounts from time to time no longer to be so retained by the Trustee shall be applied as aforesaid. Pending the application of any moneys remaining in the Construction Fund following the receipt of the aforesaid certificate, such moneys may be invested in Investment Securities in the manner permitted by Section 6.01 hereof and in accordance with the provisions of the Tax Agreement.

Section 5.03 Redemption of All Outstanding Bonds. Except as set forth in Section 5.05 hereof, in the event that all Outstanding Bonds are to be redeemed, the Trustee shall, without further authorization, deposit into the Bond Fund all amounts remaining in the Construction Fund constituting part of the Trust Estate, with advice to the Authority and the Company of such action, such deposit to be made on the date fixed for such redemption.

Section 5.04 Acceleration of Bonds. In the event that the principal of the Bonds shall have become due and payable pursuant to Section 9.01 hereof, the Trustee shall, without further authorization, deposit into the Bond Fund all amounts constituting part of the Trust Estate remaining in the Construction Fund, with advice to the Authority and the Company of such action, such deposit to be made on the date fixed for such acceleration.

Section 5.05 Refunding of Bonds. In the event that all Outstanding Bonds are paid, redeemed or deemed to have been paid within the meaning of ARTICLE VIII hereof by reason of the application of the proceeds of the sale of any obligations the interest on which is exempt from federal income taxation, under an indenture other than this Indenture, the Trustee shall, without further authorization, withdraw all amounts constituting part of the Trust Estate remaining in the Construction Fund and deposit such amounts into corresponding accounts in the construction, acquisition or other similar fund created under the indenture under which such obligations are issued, with advice to the Authority and the Company of such action, such withdrawals and deposits to be made, in accordance with the provisions of such indenture, on the date on which such Bonds are so paid, redeemed or deemed to have been paid; provided, however, that if Bonds shall have been paid, redeemed or deemed to have been paid within the meaning of ARTICLE VIII hereof by reason of the application of the proceeds of the sale of more than one issue of obligations the interest on which is excluded from gross income for federal income tax purposes under indentures other than this Indenture, the Trustee shall, if directed by an Authorized Company Representative, withdraw all amounts remaining in the Construction Fund and such amounts shall be allocated among, and deposited into, as directed by such Authorized Company Representative, corresponding accounts in the construction, acquisition or other similar funds created under the indentures under which such obligations are issued, with advice to the Authority and the Company of such action, such withdrawals and deposits to be made, in accordance with the provisions of such indentures, on the date on which all Bonds are so paid, redeemed or deemed to have been paid.

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Section 5.06 Moneys Held in Trust. All moneys and Investment Securities held by the Trustee in the Construction Fund, shall be held by the Trustee, in trust and such moneys and Investment Securities (other than any moneys or Investment Securities held in the Construction Fund established in furtherance of the obligations of the Company under Section 6.04(b) of the Loan Agreement) while so held or so required to be deposited or paid, shall constitute part of the Trust Estate and be subject to the lien and security interest created hereby in favor of the Trustee for the benefit of the Owners from time to time of the Bonds. The Company shall have no right, title or interest in the Construction Fund, except that, to the extent not required to be applied in another manner by any provision hereof, moneys held by the Trustee in the Construction Fund shall be disbursed by the Trustee to the Company upon and to the extent of, but solely upon and to the extent of, satisfaction of the conditions set forth in Section 5.01(c) hereof.

ARTICLE VI

INVESTMENTS

Section 6.01 Investments. The moneys in the Construction Fund and in the Bond Fund shall, at the written direction of the Company, be invested and reinvested in Investment Securities. Any Investment Securities may be purchased subject to options or other rights in third parties to acquire the same. In addition, the Trustee shall, at the written direction of the Company, enter into (i) reverse repurchase agreements and option agreements with respect to any Investment Securities held by it and (ii) transactions for the purchase or sale of financial futures contracts in obligations which constitute Investment Securities or options on financial futures contracts in obligations which constitute Investment Securities. Subject to the further provisions of this Section 6.01, such investments shall be made by the Trustee as directed and designated by the Company in a certificate of, or telephonic advice promptly confirmed by a certificate of, an Authorized Company Representative. As and when any amounts thus invested may be needed for disbursements from the Construction Fund or the Bond Fund, the Trustee shall request the Company to designate such investments to be sold or otherwise converted into cash to the credit of such fund as shall be sufficient to meet such disbursement requirements and shall then follow any directions in respect thereto of an Authorized Company Representative. As long as no Event of Default (as defined in Section 9.01 hereof) shall have occurred and be continuing, the Company shall have the right to designate the investments to be sold and to otherwise direct the Trustee in the sale or conversion to cash of the investments made with the moneys in the Construction Fund and in the Bond Fund, provided that the Trustee shall be entitled to conclusively assume the absence of any such Event of Default unless it has notice thereof within the meaning of Section 10.05 hereof.

ARTICLE VII

GENERAL COVENANTS

Section 7.01 No General Obligations. Each and every covenant herein made, including all covenants made in the various sections of this ARTICLE VII, is predicated upon the condition that neither Pima County, Arizona nor the State of Arizona shall in any event be liable for the payment of the principal of, or premium, if any, or interest on the Bonds or for the performance of any pledge, mortgage, obligation or agreement created by or arising out of this Indenture or the issuance of the Bonds, and further that neither the Bonds, nor the premium, if any, or interest thereon, nor any such obligation or agreement of the Authority shall be construed to constitute an indebtedness of Pima County, Arizona or the State of Arizona within the meaning of any constitutional or statutory provisions whatsoever. The Bonds and the interest and premium, if any, thereon shall be limited obligations of the Authority payable solely from the Receipts and Revenues of the Authority from the Loan Agreement and the other moneys pledged therefor.

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The Authority shall promptly cause to be paid, solely from the sources stated herein, the principal of and premium, if any, and interest on every Bond issued under this Indenture at the place, on the dates and in the manner provided herein and in said Bonds according to the true intent and meaning thereof.

Section 7.02 Performance of Covenants of the Authority; Representations. The Authority shall faithfully perform at all times any and all covenants, undertakings, stipulations and provisions contained in this Indenture, in any and every Bond executed, authenticated and delivered hereunder, and in all proceedings pertaining thereto. The Authority represents that it is duly authorized under the Constitution and laws of the State of Arizona to issue the Bonds authorized hereby, to enter into the Loan Agreement and this Indenture, and to pledge and assign to the Trustee the Trust Estate, and that the Bonds in the hands of the Owners thereof are and will be valid and binding limited obligations of the Authority.

Section 7.03 Maintenance of Rights and Powers; Compliance with Laws. The Authority shall at all times use its best efforts to maintain its corporate existence or assure the assumption of its obligations under this Indenture by any public body succeeding to its powers under the Act; and it shall at all times use its best efforts to comply with all valid acts, rules, regulations, orders and directions of any legislative, executive, administrative or judicial body known to it to be applicable to the Loan Agreement and this Indenture.

Section 7.04 Enforcement of Obligations of the Company; Amendments. Upon receipt of written notification from the Trustee, the Authority shall cooperate with the Trustee in enforcing the obligation of the Company to pay or cause to be paid all the payments and other costs and charges payable by the Company under the Loan Agreement. The Authority shall not enter into any agreement with the Company amending the Loan Agreement without the prior written consent of the Trustee and compliance with Section 12.06 and Section 12.07 of this Indenture (a revision to Exhibit A to the Loan Agreement not being deemed an amendment for purposes of this Section).

Section 7.05 Further Instruments. The Authority shall, upon the reasonable request of the Trustee, from time to time execute and deliver such further instruments and take such further action as may be reasonable and as may be required to carry out the purposes of this Indenture; provided, however, that no such instruments or actions shall pledge the credit or taxing power of the State of Arizona, Pima County, the Authority or any other political subdivision of said State.

Section 7.06 No Disposition of Trust Estate. Except as permitted by this Indenture, the Authority shall not sell, lease, pledge, assign or otherwise dispose of or encumber its interest in the Trust Estate and will promptly pay or cause to be discharged or make adequate provision to discharge any lien or charge on any part thereof not permitted hereby.

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Section 7.07 Financing Statements. The Authority and the Trustee shall cooperate with the Company in causing appropriate financing statements naming, the Trustee as pledgee of the Receipts and Revenues of the Authority from the Loan Agreement and of the other moneys pledged under the Indenture for the payment of the principal of and interest on the Bonds, and as pledgee and assignee of the balance of the Trust Estate, and the Authority shall cooperate with the Trustee and the Company in causing appropriate continuation statements to be duly filed and recorded in the appropriate state and county offices as required by the provisions of the Uniform Commercial Code or other similar law as adopted in the State of Arizona and any other applicable jurisdiction, as from time to time amended, in order to perfect and maintain the security interests created by this Indenture.

Section 7.08 Tax Covenants; Rebate Fund. (a) The Authority covenants for the benefit of all Owners from time to time of the Bonds that it will not directly or indirectly use or (to the extent within its control), permit the use of, the proceeds of any of the Bonds or any other funds of the Authority, or take or omit to take any other action, if and to the extent that such use, or the taking or omission to take such action, would cause any of the Bonds to be “arbitrage bonds” within the meaning of Section 148 of the Code or otherwise subject to federal income taxation by reason of failing to qualify under Section 103 and Sections 141 through 150 of the Code and any applicable regulations promulgated thereunder. To that end the Authority covenants to comply with all covenants set forth in the Tax Agreement, which is hereby incorporated herein by reference as though fully set forth herein.

(b) The Trustee shall establish and maintain a fund separate from any other fund established and maintained hereunder designated “The Industrial Development Authority of the County of Pima Industrial Development Revenue Bonds, 2010 Series A (Tucson Electric Power Company Project) Rebate Fund” (herein called the “Rebate Fund”) in accordance with the provisions of the Tax Agreement. Within the Rebate Fund, the Trustee shall maintain such accounts as shall be directed by the Company in order for the Authority and the Company to comply with the provisions of the Tax Agreement. Subject to the transfer provisions provided in paragraph (c) below, all money at any time deposited in the Rebate Fund shall be held by the Trustee in trust, to the extent required to satisfy the Rebate Requirement (as defined in the Tax Agreement), for payment to the United States of America, and neither the Company, the Authority or the Owners shall have any rights in or claim to such moneys. All amounts deposited into or on deposit in the Rebate Fund shall be governed by this Section 7.08, by Section 6.04 of the Loan Agreement and by the Tax Agreement. The Trustee shall conclusively be deemed to have complied with such provisions if it follows the directions of the Company, including supplying all necessary information in the manner set forth in the Tax Agreement, and shall not be required to take any actions thereunder in the absence of written directions from the Company.

(c) Upon receipt of the Company’s written instructions, the Trustee shall remit part or all of the balances in the Rebate Fund to the United States of America, as so directed. In addition, if the Company so directs, the Trustee shall deposit moneys into or transfer moneys out of the Rebate Fund from or into such accounts or funds as directed by the Company’s written directions. Any funds remaining in the Rebate Fund after all of the Bonds shall have been paid and any Rebate Requirement shall have been satisfied, or provision therefor reasonably satisfactory to the Trustee shall have been made, shall be withdrawn and remitted to the Company.

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(d) Notwithstanding any provision of this Indenture, the obligation to remit the Rebate Requirement to the United States of America and to comply with all other requirements of this Section 7.08, Section 6.04 of the Loan Agreement and the Tax Agreement shall survive the payment of the Bonds and the satisfaction and discharge of this Indenture.

ARTICLE VIII

DEFEASANCE

Section 8.01 Defeasance. If the Authority shall pay or cause to be paid to the Owner of any Bond secured hereby the principal of and interest due and payable, and thereafter to become due and payable, upon such Bond or any portion of such Bond in the principal amount of $5,000 or any integral multiple thereof, such Bond or portion thereof shall cease to be entitled to any lien, benefit or security under this Indenture. If the Authority shall pay or cause to be paid to the Owners of all the Bonds secured hereby the principal of and interest due and payable, and thereafter to become due and payable, thereon, and shall pay or cause to be paid all other sums payable hereunder including, without limitation, amounts payable pursuant to Section 10.04 hereof, then, and in that case, the right, title and interest of the Trustee in and to the Trust Estate shall thereupon cease, terminate and become void. In such event, the Trustee shall assign, transfer and turn over to the Company the Trust Estate, including, without limitation, any surplus in the Bond Fund and any balance remaining in any other fund created under this Indenture.

All or any portion of Outstanding Bonds or portions of Bonds in principal amounts of $5,000 or any integral multiple thereof, shall prior to the maturity or redemption date thereof be deemed to have been paid within the meaning and with the effect expressed in this ARTICLE VIII, and the entire indebtedness of the Authority with respect thereof shall be satisfied and discharged, when:

(a) in the event said Bonds or portions thereof have been selected for redemption in accordance with Section 3.02 hereof, the Trustee shall have given, or the Company shall have given to the Trustee in form satisfactory to it irrevocable instructions to give, on a date in accordance with the provisions of Section 3.03 hereof, notice of redemption of such Bonds or portions thereof,

(b) there shall have been deposited with the Trustee either moneys in an amount which shall be sufficient, or Government Obligations which shall not contain provisions permitting the redemption thereof at the option of the issuer, the principal of and the interest on which, when due, and without regard to any reinvestment thereof, will provide moneys which, together with the moneys, if any, deposited with or held by the Trustee, shall be sufficient, to pay when due the principal of and interest due and to become due on said Bonds or portions thereof on and prior to the redemption date or maturity date thereof, as the case may be, and

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(c) in the event said Bonds or portions thereof do not mature and are not to be redeemed within the next succeeding sixty (60) days, the Company shall have given the Trustee in form satisfactory to it irrevocable instructions to give, as soon as practicable in the same manner as a notice of redemption is given pursuant to Section 3.03 hereof, a notice to the Owners of said Bonds or portions thereof that the deposit required by clause (b) above has been made with the Trustee and that said Bonds or portions thereof are deemed to have been paid in accordance with this ARTICLE VIII and stating the maturity or redemption date upon which moneys are to be available for the payment of the principal of and interest on said Bonds or portions thereof.

Neither the Government Obligations nor moneys deposited with the Trustee pursuant to this ARTICLE VIII nor principal or interest payments on any such Government Obligations shall be withdrawn or used for any purpose other than, and such Government Obligations, moneys and principal or interest payments shall be held in trust for, the payment of the principal of and interest on said Bonds or portions thereof; provided, that any cash received from such principal or interest payments on such Government Obligations deposited with the Trustee, if not then needed for such purposes, shall, to the extent practicable, be invested in Government Obligations of the type described in clause (b) of the preceding paragraph maturing at times and in amounts sufficient to pay when due the principal of and interest to become due on said Bonds or portions thereof on and prior to such redemption date or maturity date thereof, as the case may be, and interest earned from such reinvestments shall be paid over to the Company, as received by the Trustee, free and clear of any trust, lien or pledge hereunder. If payment of less than all the Bonds is to be provided for in the manner and with the effect provided in this ARTICLE VIII, the Trustee shall select such Bonds or portions of Bonds in the manner specified by Section 3.02 hereof for selection for redemption of less than all Bonds in the principal amount designated to the Trustee by the Company. At or prior to the time of the deposit of any Government Obligations with the Trustee pursuant to this Section 8.01, the Company shall provide the Trustee with a certificate of an accountant or an accounting firm as to the sufficiency of such Government Obligations to pay when due the principal of and interest due and to become due as set forth in clause (b) of the preceding paragraph.

ARTICLE IX

DEFAULTS AND REMEDIES

Section 9.01 Events of Default. Each of the following events shall constitute and is referred to in this Indenture as an “Event of Default”:

(a) a failure to pay the principal of any of the Bonds when the same shall become due and payable at maturity, upon redemption or otherwise;

(b) a failure to pay an installment of interest on any of the Bonds after such interest shall have become due and payable for a period of thirty (30) days;

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(c) a failure by the Authority to observe and perform any covenant, condition, agreement or provision (other than as specified in clauses (a) and (b) of this Section 9.01) contained in the Bonds or in this Indenture on the part of the Authority to be observed or performed, which failure shall continue for a period of sixty (60) days after written notice, specifying such failure and requesting that it be remedied, shall have been given to the Authority and the Company by the Trustee, which may give such notice in its discretion and which shall give such notice at the written request of Owners of not less than a majority of the principal amount of the Bonds then Outstanding, unless the Trustee, or the Trustee and Owners of a principal amount of Bonds not less than the principal amount of Bonds the Owners of which requested that such notice be given, as the case may be, shall agree in writing to an extension of such period prior to its expiration; provided, however, that the Trustee, or the Trustee and the Owners of such principal amount of Bonds, as the case may be, shall be deemed to have agreed to an extension of such period if corrective action is initiated by the Authority, or the Company on behalf of the Authority, within such period and is being diligently pursued.

Upon the occurrence and continuance of any Event of Default described in clause (a) or (b) of the preceding paragraph, the Trustee may, and at the written request of Owners of not less than a majority of the principal amount of Bonds then Outstanding shall, by written notice to the Authority and the Company, declare the Bonds to be immediately due and payable, whereupon they shall, without further action, become and be immediately due and payable, anything in this Indenture or in the Bonds to the contrary notwithstanding, and the Trustee shall give notice thereof by Mail or Electronic Means to all Owners of Outstanding Bonds.

The provisions of the preceding paragraph, however, are subject to the condition that if, after the principal of the Bonds shall have been so declared to be due and payable, and before any judgment or decree for the payment of the moneys due shall have been obtained or entered as hereinafter provided, the Authority shall cause to be deposited with the Trustee a sum sufficient to pay all matured installments of interest upon all Bonds and the principal of any and all Bonds which shall have become due otherwise than by reason of such declaration (with interest upon such principal and, to the extent permissible by law, on overdue installments of interest, at the rate per annum borne by the Bonds) and such amounts as shall be sufficient to cover reasonable compensation and reimbursement of expenses payable to the Trustee and any predecessor Trustee, and all Events of Default hereunder other than nonpayment of the principal of Bonds which shall have become due by said declaration shall have been remedied, then, in every such case, such Event of Default shall be deemed waived and such declaration and its consequences rescinded and annulled, and the Trustee shall promptly give written notice of such waiver, rescission and annulment to the Authority and the Company, and, if notice of the acceleration of the Bonds shall have been given to the Owners of the Bonds, shall give notice thereof by Mail or Electronic Means to all Owners of Outstanding Bonds; but no such waiver, rescission and annulment shall extend to or affect any subsequent Event of Default or impair any right or remedy consequent thereon.

Section 9.02 Remedies. Upon the occurrence and continuance of any Event of Default, then and in every such case the Trustee in its discretion may, and upon the written request of Owners of not less than a majority in principal amount of the Bonds then Outstanding and receipt of indemnity to its satisfaction shall, in its own name and as the Trustee of an express trust:

(a) by mandamus, or other suit, action or proceeding at law or in equity, enforce all rights of the Owners of the Bonds, and require the Authority or the Company to carry out any agreements with or for the benefit of such Owners and to perform its or their duties under the Act, the Loan Agreement and this Indenture;

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(b) bring suit upon the Bonds; or

(c) by action or suit in equity enjoin any acts or things which may be unlawful or in violation of the rights of the Owners of the Bonds.

Section 9.03 Restoration to Former Position. In the event that any proceeding taken by the Trustee to enforce any right under this Indenture shall have been discontinued or abandoned for any reason, or shall have been determined adversely to the Trustee, then the Authority, the Trustee and the Owners shall be restored, subject to any determination in such proceeding, to their former positions and rights hereunder, respectively, and all rights, remedies and powers of the Trustee shall continue as though no such proceeding had been taken.

Section 9.04 Owners’ Right to Direct Proceedings. Anything in this Indenture to the contrary notwithstanding, the Owners of a majority in principal amount of the Bonds then Outstanding hereunder shall have the right, by an instrument in writing executed and delivered to the Trustee, to direct the time, method and place of conducting all remedial proceedings available to the Trustee under this Indenture or exercising any trust or power conferred on the Trustee by this Indenture; provided, however, that such direction shall not be otherwise than in accordance with law and the provisions of this Indenture and that the Trustee shall have the right (but not the obligation) to decline to follow any such direction if the Trustee, being advised by counsel, shall determine that the action or proceeding so directed may not lawfully be taken, or if the Trustee in good faith shall determine that the action or proceedings so directed would involve the Trustee in personal liability or if the Trustee in good faith shall so determine that the actions or forbearances specified in or pursuant to such direction would be unduly prejudicial to the interests of Owners not joining in the giving of said direction, it being understood that the Trustee shall have no duty to ascertain whether or not such actions or forbearances are unduly prejudicial to such Owners.

Section 9.05 Limitation on Owners’ Right to Institute Proceedings. No Owner of Bonds shall have any right to institute any suit, action or proceeding in equity or at law for the execution of any trust or power hereunder, or any other remedy hereunder or on said Bonds, unless such Owner previously shall have given to the Trustee written notice of an Event of Default as hereinabove provided and unless the Owners of not less than a majority in principal amount of the Bonds then Outstanding shall have made written request of the Trustee so to do, after the right to institute said suit, action or proceeding shall have accrued, and shall have afforded the Trustee a reasonable opportunity to proceed to institute the same in either its or their name, and unless there also shall have been offered to the Trustee security and indemnity satisfactory to it against the costs, expenses and liabilities to be incurred therein or thereby, and the Trustee shall not have complied with such request within a reasonable time; and such notification, request and offer of indemnity are hereby declared in every such case, at the option of the Trustee, to be conditions precedent to the institution of said suit, action or proceeding; it being understood and intended that no one or more of the Owners of the Bonds shall have any right in any manner whatever by his or their action to affect, disturb or prejudice the security of this Indenture, or to enforce any right hereunder or under the Bonds, except in the manner herein provided, and that all suits, actions and proceedings at law or in equity shall be instituted, had and maintained in the manner herein provided and for the equal benefit of all Owners of the Bonds.

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Section 9.06 No Impairment of Right to Enforce Payment. Notwithstanding any other provision in this Indenture, the right of any Owner of a Bond to receive payment of the principal of and interest on such Bond, on or after the respective due dates expressed therein, or 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 Owner.

Section 9.07 Proceedings by Trustee without Possession of Bonds. All rights of action under this Indenture or under any of the Bonds secured hereby which are enforceable by the Trustee may be enforced by it without the possession of any of the Bonds, or the production thereof on the trial or other proceedings relative thereto, and any such suit, action or proceeding instituted by the Trustee shall be brought in its name for the equal and ratable benefit of the Owners of the Bonds, subject to the provisions of this Indenture.

Section 9.08 No Remedy Exclusive. No remedy herein conferred upon or reserved to the Trustee or to the Owners of the Bonds is intended to be exclusive of any other remedy or remedies, and each and every such remedy shall be cumulative, and shall be in addition to every other remedy given hereunder or under the Loan Agreement, now or hereafter existing at law or in equity or by statute.

Section 9.09 No Waiver of Remedies. No delay or omission of the Trustee or of any Owner of a Bond to exercise any right or power accruing upon any default shall impair any such right or power or shall be construed to be a waiver of any such default, or an acquiescence therein; and every power and remedy given by this ARTICLE IX to the Trustee and to the Owners of the Bonds, respectively, may be exercised from time to time and as often as may be deemed expedient.

Section 9.10 Application of Moneys. Any moneys received by the Trustee, by any receiver or by any Owner of a Bond pursuant to any right given or action taken under the provisions of this ARTICLE IX, after payment of the costs and expenses of the proceedings resulting in the collection of such moneys and of all amounts due to the Trustee and any predecessor Trustee under Section 10.04 hereof, shall be deposited in the Bond Fund and all moneys so deposited in the Bond Fund during the continuance of an Event of Default (other than moneys for the payment of Bonds which had matured or otherwise become payable prior to such Event of Default or for the payment of interest due prior to such Event of Default) shall be applied as follows:

(a) Unless the principal of all the Bonds shall have become due and payable, all such moneys shall be applied (i) first, to the payment to the persons entitled thereto of all installments of interest then due on the Bonds, with interest on overdue installments, if lawful, at the rate per annum borne by the Bonds, in the order of maturity of the installments of such interest and, if the amount available shall not be sufficient to pay in full any particular installment of interest, then to the payment ratably, according to the amounts due on such installment, and (ii) second, to the payment to the persons entitled thereto of the unpaid principal of any of the Bonds which shall have become due (other than Bonds called for redemption for the payment of which money is held pursuant to the provisions of this Indenture), with interest on such Bonds at their rate from the respective dates upon which they became due and, if the amount available shall not be sufficient to pay in full Bonds due on any particular date, together with such interest, then to the payment ratably, according to the amount of principal and interest due on such date, in each case to the persons entitled thereto, without any discrimination or privilege.

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(b) If the principal of all the Bonds shall have become due and payable, all such moneys shall be applied to the payment of the principal and interest then due and unpaid upon the Bonds, with interest on overdue interest and principal, as aforesaid, without preference or priority of principal over interest or of interest over principal, or of any installment of interest over any other installment of interest, or of any Bond over any other Bond, ratably, according to the amounts due respectively for principal and interest, to the persons entitled thereto without any discrimination or privilege.

(c) If the principal of all the Bonds shall have become due and payable, and if acceleration of the maturity of the Bonds by reason of such Event of Default shall thereafter have been rescinded and annulled under the provisions of this ARTICLE IX, then, subject to the provisions of clause (b) of this Section 9.10 which shall be applicable in the event that the principal of all the Bonds shall later become due and payable, the moneys shall be applied in accordance with the provisions of clause (a) of this Section 9.10.

Section 9.11 Severability of Remedies. It is the purpose and intention of this ARTICLE IX to provide rights and remedies to the Trustee and the Owners which may be lawfully granted under the provisions of the Act, but should any right or remedy herein granted be held to be unlawful, the Trustee and the Owners shall be entitled, as above set forth, to every other right and remedy provided in this Indenture and by law.

ARTICLE X

TRUSTEE

Section 10.01 Acceptance of Trusts. The Trustee hereby accepts and agrees to execute the trusts hereby created, but only upon the additional terms set forth in this ARTICLE X, to all of which the Authority agrees and the respective Owners agree by their acceptance of delivery of any of the Bonds.

Section 10.02 No Responsibility for Recitals. The recitals, statements and representations contained in this Indenture or in the Bonds, save only the Trustee’s authentication upon the Bonds, are not made by the Trustee, and the Trustee does not assume, and shall not have, any responsibility or obligation for the correctness of any thereof. The Trustee makes no representation as to the validity or sufficiency of this Indenture or the Bonds.

Section 10.03 Limitations on Liability. The Trustee may execute any of the trusts or powers hereof and perform the duties required of it hereunder by or through attorneys, agents, receivers, or employees, and shall be entitled to advice of counsel concerning all matters of trust and its duty hereunder, and the Trustee shall not be answerable for the default or misconduct of any such attorney, agent, receiver, or employee selected by it with reasonable care. The Trustee shall not be answerable for the exercise of any discretion or power under this Indenture or for anything whatsoever in connection with the trust created hereby, except only for its own negligence or willful misconduct.

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Anything in this Indenture to the contrary notwithstanding, the Trustee shall in no event be required to expend or risk its own funds or otherwise incur personal financial liability in the performance of any of its duties or in the exercise of any of its rights or powers, if there shall be reasonable grounds for believing that the repayment of such funds or adequate indemnity against such liability is not reasonably assured to it.

Section 10.04 Compensation, Expenses and Advances. The Trustee under this Indenture shall be entitled to reasonable compensation for its services rendered hereunder (not limited by any provision of law regarding the compensation of the trustee of an express trust) and to reimbursement for its actual out of pocket expenses (including counsel fees) reasonably incurred in connection therewith except as a result of its negligence or willful misconduct, including, without limitation, compensation for any services rendered, and reimbursement for any expenses incurred, at and subsequent to the time the Bonds are deemed to have been paid in accordance with ARTICLE VIII hereof. In Section 5.03 of the Loan Agreement, the Company has agreed that it will pay to the Trustee (including any predecessor Trustee) such compensation and reimbursement of expenses and advances, but the Company may, without creating a default hereunder, contest in good faith the reasonableness of any such services, expenses and advances. If the Company shall have failed to make any payment to the Trustee or any predecessor Trustee under Section 5.03 of the Loan Agreement and such failure shall have resulted in an Event of Default under the Loan Agreement, the Trustee, and any predecessor Trustee, shall have, in addition to any other rights hereunder, a claim, prior to the claim of the Owners, for the payment of its compensation and the reimbursement of its expenses and any advances made by it, as provided in this Section 10.04, upon the moneys and obligations in the Bond Fund; provided, however, that neither the Trustee nor any predecessor Trustee shall have any such claim upon moneys or obligations deposited with or paid to the Trustee for the redemption or payment of Bonds which are deemed to have been paid in accordance with ARTICLE VIII hereof.

In Section 5.04 of the Loan Agreement, the Company has agreed to indemnify the Trustee and any predecessor Trustee to the extent provided therein.

Section 10.05 Notice of Events of Default. The Trustee shall not be required to take notice, or be deemed to have notice, of any default or Event of Default under this Indenture other than an Event of Default under clause (a) or (b) of the first paragraph of Section 9.01 hereof, unless an officer assigned by the Trustee to administer its corporate trust business has been specifically notified in writing of such default or Event of Default by Owners of at least a majority of the principal amount of the Bonds then Outstanding. The Trustee may, however, at any time, in its discretion, require of the Authority and the Company full information and advice as to the performance of any of the covenants, conditions and agreements contained herein.

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Section 10.06 Action by Trustee. The Trustee shall be under no obligation to take any action in respect of any default or Event of Default hereunder or toward the execution or enforcement of any of the trusts hereby created, or to institute, appear in or defend any suit or other proceeding in connection therewith, unless requested in writing so to do by Owners of at least a majority in principal amount of the Bonds then Outstanding, and, if in its opinion such action may tend to involve it in expense or liability, unless furnished, from time to time as often as it may require, with security and indemnity satisfactory to it. The foregoing provisions are intended only for the protection of the Trustee, and shall not affect any discretion or power given by any provisions of this Indenture to the Trustee to take action in respect of any default or Event of Default without such notice or request from the Owners of the Bonds, or without such security or indemnity.

Section 10.07 Good Faith Reliance. The Trustee shall be protected and shall incur no liability in acting or proceeding in good faith upon any resolution, notice, telegram, e-mail, facsimile transmission, request, consent, waiver, certificate, statement, affidavit, voucher, bond, requisition or other paper or document which it shall in good faith believe to be genuine and to have been passed or signed by the proper board, body or person or to have been prepared and furnished pursuant to any of the provisions of this Indenture or the Loan Agreement, or upon the written opinion of any attorney, engineer, accountant or other expert believed by the Trustee to be qualified in relation to the subject matter, and the Trustee shall be under no duty to make any investigation or inquiry as to any statements contained or matters referred to in any such instrument, but may accept and rely upon the same as conclusive evidence of the truth and accuracy of such statements. The Trustee shall not be bound to recognize any person as an Owner of a Bond or to take any action at his request unless the ownership of such Bond is proved as contemplated in Section 11.01 hereof.

Section 10.08 Dealings in Bonds and with the Authority and the Company. The Trustee, in its individual or any other capacity, may in good faith buy, sell, own, hold and deal in any of the Bonds issued hereunder, and may join in any action which any Owner of a Bond may be entitled to take with like effect as if it did not act in any capacity hereunder. The Trustee, in its individual or any other capacity, either as principal or agent, may also engage in or be interested in any financial or other transaction with the Authority or the Company, and may act as depositary, trustee, or agent for any committee or body of Owners of Bonds secured hereby or other obligations of the Authority as freely as if it did not act in any capacity hereunder.

Section 10.09 Allowance of Interest. The Trustee may, but shall not be obligated to, allow and credit interest upon any moneys which it may at any time receive under any of the provisions of this Indenture, at such rate, if any, as it customarily allows upon similar funds of similar size and under similar conditions. All interest allowed on any such moneys shall be credited as provided in ARTICLE IV and ARTICLE V with respect to interest on investments.

Section 10.10 Construction of Indenture. The Trustee may construe any of the provisions of this Indenture insofar as the same may appear to be ambiguous or inconsistent with any other provision hereof, and any construction of any such provisions hereof by the Trustee in good faith shall be binding upon the Owners of the Bonds.

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Section 10.11 Resignation of Trustee. The Trustee may resign and be discharged of the trusts created by this Indenture by executing an instrument in writing resigning such trust and specifying the date when such resignation shall take effect, and filing the same with the President of the Authority and with the Company, not less than forty-five (45) days before the date specified in such instrument when such resignation shall take effect, and by giving notice of such resignation by Mail or Electronic Means to all Owners of Bonds. Such resignation shall take effect on the later to occur of (i) the day specified in such instrument and notice, unless previously a successor Trustee shall have been appointed as hereinafter provided, in which event such resignation shall take effect immediately upon the appointment of such successor Trustee and (ii) the appointment of a successor Trustee.

So long as no event which is, or after notice or lapse of time, or both, would become, an Event of Default shall have occurred and be continuing, if the Authority shall have delivered to the Trustee (i) an instrument appointing a successor Trustee, effective as of a date specified therein and (ii) an instrument of acceptance of such appointment, effective as of such date, by such successor Trustee in accordance with Section 10.16, the Trustee shall be deemed to have resigned as contemplated in this Section, the successor Trustee shall be deemed to have been appointed pursuant to subsection (b) of Section 10.13 and such appointment shall be deemed to have been accepted as contemplated in Section 10.16, all as of such date, and all other provisions of this ARTICLE X shall be applicable to such resignation, appointment and acceptance except to the extent inconsistent with this paragraph. The Authority shall deliver any such instrument of appointment at the direction of the Company.

Section 10.12 Removal of Trustee. The Trustee may be removed at any time by filing with the Trustee so removed, and with the Authority and the Company, an instrument or instruments in writing, appointing a successor, or an instrument or instruments in writing, consenting to the appointment by the Authority (at the direction of the Company) of a successor and accompanied by an instrument of appointment by the Authority (at the direction of the Company) of such successor, and in any event executed by Owners of not less than a majority in principal amount of the Bonds then Outstanding, such filing to be made by any Owner of a Bond or his duly authorized attorney.

Section 10.13 Appointment of Successor Trustee. (a) In case at any time the Trustee shall be removed, or be dissolved, or if its property or affairs shall be taken under the control of any state or federal court or administrative body because of insolvency or bankruptcy, or for any other reason, then a vacancy shall forthwith and ipso facto exist and a successor may be appointed, and in case at any time the Trustee shall resign or be deemed to have resigned, then a successor may be appointed, by filing with the Authority and the Company an instrument in writing appointing such successor Trustee executed by Owners of not less than a majority in principal amount of Bonds then Outstanding. Copies of such instrument shall be promptly delivered by the Authority to the predecessor Trustee, to the Trustee so appointed and the Company.

(b) Until a successor Trustee shall be appointed by the Owners of the Bonds as herein authorized, the Authority, shall appoint a successor Trustee as directed by the Company. After any appointment by the Authority, it shall cause notice of such appointment to be given by Mail or Electronic Means to all Owners of Bonds. Any new Trustee so appointed by the Authority shall immediately and without further act be superseded by a Trustee appointed by the Owners of the Bonds in the manner above provided.

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(c) No resignation or removal of the Trustee and no appointment of a successor Trustee pursuant to this ARTICLE X shall become effective until the acceptance of appointment by the successor Trustee.

Section 10.14 Qualifications of Successor Trustee. Every successor Trustee (a) shall be a bank, national banking association or trust company duly organized under the laws of the United States or any state or territory thereof authorized by law to perform all the duties imposed upon it by this Indenture and (b) shall have (or the parent holding company of which shall have) a combined capital stock, surplus and undivided profits of at least $100,000,000 if there can be located, with reasonable effort, such an institution willing and able to accept the trust on reasonable and customary terms.

Section 10.15 Judicial Appointment of Successor Trustee. In case at any time the Trustee shall resign and no appointment of a successor Trustee shall be made pursuant to the foregoing provisions of this ARTICLE X prior to the date specified in the notice of resignation as the date when such resignation is to take effect, the retiring Trustee may forthwith apply to a court of competent jurisdiction for the appointment of a successor Trustee. If no appointment of a successor Trustee shall be made pursuant to the foregoing provisions of this ARTICLE X within six (6) months after a vacancy shall have occurred in the office of Trustee, any Owner of a Bond may apply to any court of competent jurisdiction to appoint a successor Trustee. Such court may thereupon, after such notice, if any, as it may deem proper and prescribe, appoint a successor Trustee.

Section 10.16 Acceptance of Trusts by Successor Trustee. Any successor Trustee appointed hereunder shall execute, acknowledge and deliver to the Authority an instrument accepting such appointment hereunder, and thereupon such successor Trustee, without any further act, deed or conveyance, shall become duly vested with all the estates, property, rights, powers, trusts, duties and obligations of its predecessor in the trust hereunder, with like effect as if originally named Trustee herein. Upon request of such Trustee, such predecessor Trustee and the Authority shall execute and deliver an instrument transferring to such successor Trustee all the estates, property, rights, powers and trusts hereunder of such predecessor Trustee and, subject to the provisions of Section 10.04 hereof, such predecessor Trustee shall pay over to the successor Trustee all moneys and other assets at the time held by it hereunder.

Section 10.17 Successor by Merger or Consolidation. Any corporation or association into which any Trustee hereunder may be merged or converted or with which it may be consolidated, or any corporation or association resulting from any merger or consolidation to which any Trustee hereunder shall be a party or any corporation or association succeeding to or acquiring the corporate trust business of the Trustee, shall be the successor Trustee under this Indenture, without the execution or filing of any paper or any further act on the part of the parties hereto, anything in this Indenture to the contrary notwithstanding.

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If, at the time any such successor to the Trustee shall succeed to the trusts created by this Indenture, any of the Bonds shall have been authenticated but not delivered, such successor Trustee may adopt the certificate of authentication of any predecessor Trustee and deliver such Bonds so authenticated; provided, however, that the right to adopt the certificate of authentication of any predecessor Trustee shall apply only to its successor or successors by merger, conversion or consolidation.

Section 10.18 Standard of Care. Notwithstanding any other provisions of this ARTICLE X, the Trustee shall, during the existence of an Event of Default of which the Trustee has actual notice, exercise such of the rights and powers vested in it by this Indenture and use the same degree of skill and care in their exercise as a prudent person would use and exercise under the circumstances in the conduct of his own affairs.

Section 10.19 Notice to Owners of Bonds of Event of Default. If an Event of Default occurs of which the Trustee by Section 10.05 hereof is required to take notice and deemed to have notice, or any other Event of Default occurs of which the Trustee has been specifically notified in accordance with Section 10.05 hereof, and any such Event of Default shall continue for at least two days after the Trustee acquires actual notice thereof, unless the Trustee shall have theretofore given a notice of acceleration pursuant to Section 9.01 hereof, the Trustee shall give Notice by Mail or Electronic Means to all Owners of Outstanding Bonds.

Section 10.20 Intervention in Litigation of the Authority. In any judicial proceeding to which the Authority is a party and which in the opinion of the Trustee and its counsel has a substantial bearing on the interests of the Owners of Bonds, the Trustee may intervene on behalf of the Owners of the Bonds and shall, upon receipt of indemnity satisfactory to it, do so if requested in writing by Owners of at least a majority in principal amount of the Bonds then Outstanding if permitted by the court having jurisdiction in the premises.

Section 10.21 Notices of Trustee. The Trustee shall give notice to both the Authority and the Company whenever it is required hereby to give notice to either and, additionally, shall furnish to the Authority and the Company copies of any Notice by Mail or Electronic Means given by it pursuant to any provision hereof.

ARTICLE XI

EXECUTION OF INSTRUMENTS BY OWNERS OF BONDS AND
PROOF OF OWNERSHIP OF BONDS

Section 11.01 Execution of Instruments; Proof of Ownership. Any request, direction, consent or other instrument in writing, whether or not required or permitted by this Indenture to be signed or executed by Owners of the Bonds, may be in any number of concurrent instruments of similar tenor and may be signed or executed by Owners of the Bonds or by an agent appointed by an instrument in writing. Proof of the execution of any such instrument and of the ownership of Bonds shall be sufficient for any purpose of this Indenture and shall be conclusive in favor of the Trustee with regard to any action taken by it under such instrument if made in the following manner:

(a) The fact and date of the execution by any person of any such instrument may be proved by the certificate of any officer in any jurisdiction who, by the laws thereof, has power to take acknowledgments within such jurisdiction, to the effect that the person signing such instrument acknowledged before him the execution thereof, or by an affidavit of a witness to such execution.

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(b) The ownership or former ownership of Bonds shall be proved by the registration books kept under the provisions of Section 2.08 hereof.

Nothing contained in this ARTICLE XI shall be construed as limiting the Trustee to such proof, it being intended that the Trustee may accept any other evidence of matters herein stated which it may deem sufficient. Any request or consent of any Owner of a Bond shall bind every future Owner of the same Bond or any Bond or Bonds issued in lieu thereof in respect of anything done by the Trustee or the Authority in pursuance of such request or consent.

ARTICLE XII

MODIFICATION OF THIS INDENTURE AND THE LOAN AGREEMENT

Section 12.01 Limitations. Neither this Indenture nor the Loan Agreement shall be modified or amended in any respect subsequent to the original issuance of the Bonds except as provided in and in accordance with and subject to the provisions of this ARTICLE XII and Section 7.04 hereof.

The Trustee may, but shall not be obligated to, enter into any Supplemental Indenture which affects the Trustee’s own rights, duties or immunities under this Indenture or otherwise.

Section 12.02 Supplemental Indentures without Owner Consent. The Authority and the Trustee may, from time to time and at any time, without the consent of or notice to the Owners of the Bonds, enter into Supplemental Indentures as follows:

(a) to cure any formal defect, omission, inconsistency or ambiguity in this Indenture, provided, however, that such cure shall not materially and adversely affect the interests of the Owners of the Bonds;

(b) to grant to or confer or impose upon the Trustee for the benefit of the Owners of the Bonds any additional rights, remedies, powers, authority, security, liabilities or duties which may lawfully be granted, conferred or imposed;

(c) to add to the covenants and agreements of, and limitations and restrictions upon, the Authority in this Indenture other covenants, agreements, limitations and restrictions to be observed by the Authority;

(d) to confirm, as further assurance, any pledge under, and the subjection to any claim, lien or pledge created or to be created by, this Indenture, of the Receipts and Revenues of the Authority from the Loan Agreement or of any other moneys, securities or funds;

(e) to authorize a different denomination or denominations of the Bonds and to make correlative amendments and modifications to this Indenture regarding exchange ability of Bonds of different denominations, redemptions of portions of Bonds of particular denominations and similar amendments and modifications of a technical nature;

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(f) to modify, alter, supplement or amend this Indenture in such manner as shall permit the qualification hereof under the Trust Indenture Act of 1939, as from time to time amended;

(g) to modify, alter, supplement or amend this Indenture in such manner as shall be necessary, desirable or appropriate in order to provide for or eliminate the registration and registration of transfer of the Bonds through a book entry or similar method, whether or not the Bonds are evidenced by certificates;

(h) to modify, alter, amend or supplement this Indenture in any other respect which is not materially adverse to the Owners and which does not involve a change described in clause (i), (ii), (iii) or (iv) of Section 12.03(a) hereof; and

(i) to provide any additional procedures, covenants or agreements necessary or desirable to maintain the tax-exempt status of interest on the Bonds.

Before the Authority and the Trustee shall enter into any Supplemental Indenture pursuant to this Section 12.02, there shall have been delivered to the Trustee an opinion of Bond Counsel stating that such Supplemental Indenture is authorized or permitted by this Indenture and the Act, complies with their respective terms, will, upon the execution and delivery thereof, be valid and binding upon the Authority in accordance with its terms and will not, in and of itself, adversely affect the exclusion from gross income for federal tax purposes of the interest on the Bonds.

Section 12.03 Supplemental Indentures with Consent of Owners. (a) Except for any Supplemental Indenture entered into pursuant to Section 12.02 hereof, subject to the terms and provisions contained in this Section 12.03 and Section 12.05 hereof and not otherwise, Owners of not less than a majority in aggregate principal amount of the Bonds then Outstanding which would be adversely affected thereby shall have the right from time to time to consent to and approve the execution and delivery by the Authority and the Trustee of any Supplemental Indenture deemed necessary or desirable by the Authority for the purposes of modifying, altering, amending, supplementing or rescinding, in any particular, any of the terms or provisions contained in this Indenture; provided, however, that, unless approved in writing by the Owners of all the Bonds then Outstanding which would be adversely affected thereby, nothing herein contained shall permit, or be construed as permitting, (i) a change in the times, amounts or currency of payment of the principal of or interest on any Outstanding Bond, a reduction in the principal amount or redemption price of any Outstanding Bond or a change in the rate of interest thereon, or any impairment of the right of any Owner to institute suit for the payment of any Bond owned by it, or (ii) the creation of a claim or lien upon, or a pledge of, the Receipts and Revenues of the Authority from the Loan Agreement ranking prior to or on a parity with the claim, lien or pledge created by this Indenture (except as referred to in Section 10.04 hereof), or (iii) a preference or priority of any Bond or Bonds over any other Bond or Bonds, or (iv) a reduction in the aggregate principal amount of Bonds the consent of the Owners of which is required for any such Supplemental Indenture or which is required, under Section 12.07 hereof, for any modification, alteration, amendment or supplement to the Loan Agreement.

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(b) If at any time the Authority shall request the Trustee to enter into any Supplemental Indenture for any of the purposes of this Section 12.03, the Trustee shall cause notice of the proposed Supplemental Indenture to be given by Mail or Electronic Means to all Owners of Outstanding Bonds. Such notice shall briefly set forth the nature of the proposed Supplemental Indenture and shall state that a copy thereof is on file at the Principal Office of the Trustee for inspection by all Owners of Bonds.

(c) Within two (2) years after the date of the first mailing of such notice, the Authority and the Trustee may enter into such Supplemental Indenture in substantially the form described in such notice only if there shall have first been delivered to the Trustee (i) the required consents, in writing, of Owners of Bonds and (ii) an opinion of Bond Counsel stating that such Supplemental Indenture is authorized or permitted by this Indenture and the Act, complies with their respective terms and, upon the execution and delivery thereof, will be valid and binding upon the Authority in accordance with its terms and will not, in and of itself, adversely affect the exclusion from gross income for federal tax purposes of the interest on the Bonds.

(d) If Owners of not less than the percentage of Bonds required by this Section 12.03 shall have consented to and approved the execution and delivery thereof as herein provided, no Owner shall have any right to object to the execution and delivery of such Supplemental Indenture, or to object to any of the terms and provisions contained therein or the operation thereof, or in any manner to question the propriety of the execution and delivery thereof, or to enjoin or restrain the Authority or the Trustee from executing and delivering the same or from taking any action pursuant to the provisions thereof.

Section 12.04 Effect of Supplemental Indenture. Upon the execution and delivery of any Supplemental Indenture pursuant to the provisions of this ARTICLE XII, this Indenture shall be, and be deemed to be, modified, altered, amended or supplemented in accordance therewith, and the respective rights, duties and obligations under this Indenture of the Authority, the Trustee and Owners of all Bonds then Outstanding shall thereafter be determined, exercised and enforced under this Indenture subject in all respects to such modifications, alterations, amendments and supplements.

Section 12.05 Consent of the Company. Anything herein to the contrary notwithstanding, any Supplemental Indenture under this ARTICLE XII which affects any rights, powers, agreements or obligations of the Company under the Loan Agreement, or requires a revision of the Loan Agreement, shall not become effective unless and until the Company shall have consented to such Supplemental Indenture.

Section 12.06 Amendment of Loan Agreement without Consent of Owners. Without the consent of or notice to the Owners of the Bonds, the Authority may enter into any Supplemental Loan Agreement, and the Trustee may consent thereto, as may be required (a) by the provisions of the Loan Agreement and this Indenture, (b) for the purpose of curing any formal defect, omission, inconsistency or ambiguity therein, (c) to provide any additional procedures, covenants or agreements necessary or desirable to maintain the tax-exempt status of interest on the Bonds, or (d) in connection with any other change therein which is not materially adverse to the Owners of the Bonds. A revision of Exhibit A to the Loan Agreement shall not be deemed a Supplemental Loan Agreement for purposes of this Indenture.

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Before the Authority shall enter into, and the Trustee shall consent to, any Supplemental Loan Agreement pursuant to this Section 12.06, there shall have been delivered to the Trustee an opinion of Bond Counsel stating that such Supplemental Loan Agreement is authorized or permitted by this Indenture and the Act, complies with their respective terms, will, upon the execution and delivery thereof, be valid and binding upon the Authority and the Company in accordance with its terms and will not, in and of itself, adversely affect the exclusion from gross income for federal tax purposes of interest on the Bonds.

Section 12.07 Amendment of Loan Agreement with Consent of Owners. Except in the case of a Supplemental Loan Agreement referred to in Section 12.06 hereof, the Authority shall not enter into, and the Trustee shall not consent to, any Supplemental Loan Agreement without the written approval or consent of the Owners of not less than a majority in aggregate principal amount of the Bonds then Outstanding which would be adversely affected thereby, given and procured as provided in Section 12.03 hereof; provided, however, that, unless approved in writing by the Owners of all Bonds then Outstanding which would be adversely affected thereby, nothing herein contained shall permit, or be construed as permitting, a change in the obligations of the Company under Section 5.01 of the Loan Agreement. If at any time the Authority or the Company shall request the consent of the Trustee to any such proposed Supplemental Loan Agreement, the Trustee shall cause notice of such proposed Supplemental Loan Agreement to be given in the same manner as provided by Section 12.03 hereof with respect to Supplemental Indentures. Such notice shall briefly set forth the nature of such proposed Supplemental Loan Agreement and shall state that copies of the instrument embodying the same are on file at the Principal Office of the Trustee for inspection by all Owners of the Bonds. The Authority may enter into, and the Trustee may consent to, any such proposed Supplemental Loan Agreement subject to the same conditions, and with the same effect, as provided by Section 12.03 hereof with respect to Supplemental Indentures.

Section 12.08 Company as Owner. Anything herein to the contrary notwithstanding, for so long as the Company holds all of Outstanding Bonds, any action that may be taken by the Owners of the Bonds may be taken by the Company.

ARTICLE XIII

MISCELLANEOUS

Section 13.01 Successors of the Authority. In the event of the dissolution of the Authority, all the covenants, stipulations, promises and agreements in this Indenture contained, by or on behalf of, or for the benefit of, the Authority, shall bind or inure to the benefit of the successors of the Authority from time to time and any entity, officer, board, commission, agency or instrumentality to whom or to which any power or duty of the Authority shall be transferred.

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Section 13.02 Parties in Interest. Except as herein otherwise specifically provided, nothing in this Indenture expressed or implied is intended or shall be construed to confer upon any person, firm or corporation other than the Authority, the Company and the Trustee and their successors and assigns and the Owners of the Bonds any right, remedy or claim under or by reason of this Indenture, this Indenture being intended to be for the sole and exclusive benefit of the Authority, the Company and the Trustee and their successors and assigns and the Owners of the Bonds.

Section 13.03 Severability. In case any one or more of the provisions of this Indenture or of the Loan Agreement or of the Bonds shall, for any reason, be held to be illegal or invalid, such illegality or invalidity shall not affect any other provisions of this Indenture or of the Loan Agreement or of such Bonds, and this Indenture and the Loan Agreement and such Bonds shall be construed and enforced as if such illegal or invalid provisions had not been contained herein or therein.

Section 13.04 No Personal Liability of Authority Officials. No covenant or agreement contained in the Bonds or in this Indenture shall be deemed to be the covenant or agreement of any director, official, officer, agent, or employee of the Authority in his individual capacity, and neither the members of the Board of Directors of the Authority nor any official executing the Bonds shall be liable personally on the Bonds or be subject to any personal liability or accountability by reason of the issuance thereof.

Section 13.05 Bonds Owned by the Authority or the Company. In determining whether Owners of the requisite aggregate principal amount of the Bonds have concurred in any direction, consent or waiver under this Indenture, Bonds which are owned by the Authority or the Company or by any person directly or indirectly controlling or controlled by or under direct or indirect common control with the Company (unless the Authority, the Company or such person owns all Bonds which are then Outstanding, determined without regard to this Section 13.05) shall be disregarded and deemed not to be Outstanding for the purpose of any such determination, except that, for the purpose of determining whether the Trustee shall be protected in relying on any such direction, consent or waiver, only Bonds which the Trustee knows are so owned shall be so disregarded. Upon the request of the Trustee, the Company and the Authority shall furnish to the Trustee a certificate identifying all Bonds, if any, actually known to either of them to be owned or held by or for the account of any of the above described persons, and the Trustee shall be entitled to rely on such certificate as conclusive evidence of the facts set forth therein and that all other Bonds are Outstanding for the purposes of such determination. Bonds 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 respect to such Bonds and that the pledgee is not the Authority or the Company or any person directly or indirectly controlling or controlled by or under direct or indirect common control with the Company. In case of a dispute as to such right, any decision by the Trustee taken upon the advice of counsel shall be full protection to the Trustee.

Section 13.06 Counterparts. This Indenture may be executed in any number of counterparts, each of which, when so executed and delivered, shall be an original; but such counterparts shall together constitute but one and the same Indenture.

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Section 13.07 Governing Law. The laws of the State of Arizona shall govern the construction and enforcement of this Indenture and of all Bonds, except that the laws of the State of New York shall govern the construction and enforcement of the rights and duties of the Trustee hereunder and the construction of Section 13.09 hereof and the computation of any period of grace provided herein.

Section 13.08 Notices. Except as otherwise provided in this Indenture, all notices, certificates, requests requisitions or other communications by the Authority, the Company or the Trustee pursuant to this Indenture shall be in writing and shall be sufficiently given and shall be deemed given when mailed by registered mail, postage prepaid, addressed as follows: If to the Authority, c/o Russo, Russo & Slania, P.C., 6700 North Oracle Road, Suite 100, Tucson, Arizona 85704; if to the Company, One South Church Avenue, Suite 100, Tucson, Arizona 85701, Attention: Treasurer; and if to the Trustee, at 100 Wall Street, Suite 1600, New York, New York 10005, Attention: Corporate Trust Services. Any of the foregoing may, by notice given hereunder to each of the others, designate any further or different addresses to which subsequent notices, certificates, requests or other communications shall be sent hereunder. Anything herein to the contrary notwithstanding, any notice required to be delivered hereunder may also be delivered by electronic means including, without limitation, email in PDF format.

Section 13.09 Holidays. If the date for making any payment or the last date for performance of any act or the exercising of any right, as provided in this Indenture, shall be a Saturday, Sunday or a public holiday in the city in which is located the Principal Office of the Trustee, such payment may be made or act performed or right exercised on the next succeeding business day, with the same force and effect as if done on the nominal date provided in this Indenture, and no interest shall accrue for the period after such nominal date. If the last day of any period of grace, as provided in this Indenture, shall be a Saturday, Sunday or a public holiday in the city in which is located the Principal Office of the Trustee, the last day of such period of grace shall be deemed to be the next succeeding business day.

Section 13.10 Statutory Notice Regarding Cancellation of Contracts. As required by the provisions of Section 38-511, Arizona Revised Statutes, as amended, notice is hereby given that political subdivisions of the State of Arizona or any of their departments or agencies may, within three (3) years of its execution, cancel any contract, without penalty or further obligation, made by the political subdivisions or any of their departments or agencies on or after September 30, 1988, if any person significantly involved in initiating, negotiating, securing, drafting or creating the contract on behalf of the political subdivisions or any of their departments or agencies is, at any time while the contract or any extension of the contact is in effect, an employee or agent of any other party to the contract in any capacity or a consultant to any other party of the contract with respect to the subject matter of the contract.

The Trustee covenants and agrees not to employ as an employee, agent or, with respect to the subject matter of this Indenture, a consultant, any person actually known by the Trustee to be significantly involved in initiating, negotiating, securing, drafting or creating such Indenture on behalf of the Authority within three (3) years from the execution hereof, unless a waiver is provided by the Authority.

41

IN WITNESS WHEREOF, The Industrial Development Authority of the County of Pima has caused this Indenture to be executed by its President and U.S. Bank Trust National Association has caused this Indenture to be executed on its behalf by its Vice President, all as of the day and year first above written.

THE INDUSTRIAL DEVELOPMENT AUTHORITY OF THE COUNTY OF PIMA
By:	/s/ Stanley Lehman
	Name:	Stanley Lehman
	Title:	President

U.S. BANK TRUST NATIONAL ASSOCIATION
By:	/s/ Patrick J. Crowley
	Name:	Patrick J. Crowley
	Title:	Vice President

42

EXHIBIT A

(FORM OF BOND)

No.

THE INDUSTRIAL DEVELOPMENT AUTHORITY

OF THE COUNTY OF PIMA

INDUSTRIAL DEVELOPMENT REVENUE BOND,

2010 SERIES A

(TUCSON ELECTRIC POWER COMPANY PROJECT)

INTEREST RATE (PER ANNUM):
MATURITY DATE:	DATED:
CUSIP:
REGISTERED OWNER:
PRINCIPAL AMOUNT:	DOLLARS

The Industrial Development Authority of the County of Pima, an Arizona nonprofit corporation designated by law as a political subdivision of the State of Arizona (the “Authority”), for value received, hereby promises to pay (but only out of the Receipts and Revenues of the Authority from the Loan Agreement, as hereinafter defined, and other moneys pledged therefor) to the Registered Owner identified above or registered assigns, on the Maturity Date set forth above, upon the presentation and surrender hereof, the Principal Amount set forth above and to pay (but only out of the Receipts and Revenues of the Authority from the Loan Agreement and other moneys pledged therefor), interest on said Principal Amount until payment of said Principal Amount has been made or duly provided for, from the date hereof, at the Interest Rate set forth above, semi-annually on the first day of April and October in each year, commencing April 1, 2011. Interest will be calculated on the basis of a 360-day year of twelve 30-day months. All capitalized terms used and not otherwise defined herein shall have the meanings assigned to such terms in the hereinafter defined Indenture.

The principal of this Bond is payable at the principal office of U.S. Bank Trust National Association, as trustee. Interest on this Bond is payable by check drawn upon the Trustee and mailed to the Registered Owner of this Bond as of the close of business on the Record Date at the registered address of such Registered Owner; notwithstanding the foregoing, upon request to the Trustee by a Registered Owner of not less than $1,000,000 in aggregate principal amount of Bonds, interest on such Bonds and, after presentation and surrender of such Bonds, the principal thereof shall be paid to such Registered Owner by wire transfer to the account maintained within the continental United States specified by such Registered Owner or, if such Registered Owner maintains an account with the entity acting as Trustee, by deposit into such account. Payment of the principal of and interest on, this Bond shall be in any coin or currency of the United States of America as, at the respective times of payment, shall be legal tender for the payment of public and private debts.

A-1

This Bond is one of the duly authorized The Industrial Development Authority of the County of Pima Industrial Development Revenue Bonds, 2010 Series A (Tucson Electric Power Company Project) (the “Bonds”) of the Authority, aggregating ONE HUNDRED MILLION DOLLARS ($100,000,000) in principal amount, issued under and pursuant to the Constitution and laws of the State of Arizona, particularly Title 35, Chapter 5, Arizona Revised Statutes, as amended (the “Act”), and the Indenture of Trust, dated as of October 1, 2010 (the “Indenture”), between the Authority and U.S. Bank Trust National Association, as trustee (together with any successor thereto, the “Trustee”). Pursuant to the Loan Agreement, dated as of October 1, 2010 (the “Loan Agreement”), between the Authority and Tucson Electric Power Company, a corporation organized and existing under the laws of the State of Arizona (the “Company”), the proceeds of the Bonds will be loaned to the Company and will be applied to finance a portion of the costs of the acquisition, construction, improvement and equipping of the Facilities.

Neither Pima County, Arizona nor the State of Arizona shall in any event be liable for the payment of the principal of or premium, if any, or interest on the Bonds, and neither the Bonds, nor the premium, if any, or the interest thereon, shall be construed to constitute an indebtedness of Pima County, Arizona or the State of Arizona within the meaning of any constitutional or statutory provisions whatsoever. The Bonds and the premium, if any, and the interest thereon are limited obligations of the Authority payable solely from the Receipts and Revenues of the Authority from the Loan Agreement and other moneys pledged therefor under the Indenture.

The Bonds are equally and ratably secured, to the extent provided in the Indenture, by the pledge thereunder of the “Receipts and Revenues of the Authority from the Loan Agreement”, which term is used herein as defined in the Indenture and which as therein defined means all moneys paid or payable to the Trustee for the account of the Authority by the Company in respect of the loan payments, including all receipts of the Trustee which, under the provisions of the Indenture, reduce the amounts of such payments. The Authority has also pledged and assigned to the Trustee as security for the Bonds all other rights and interests of the Authority under the Loan Agreement (other than its rights to indemnification and its administrative expenses and certain other rights).

The transfer of this Bond shall be registered upon the registration books kept at the principal office of the Trustee, at the written request of the Registered Owner hereof or his attorney duly authorized in writing, upon surrender of this Bond at said office, together with a written instrument of transfer satisfactory to the Trustee duly executed by the Registered Owner or his duly authorized attorney.

In the manner and with the effect provided in the Indenture, each of the Bonds may be redeemed prior to maturity, as follows:

(a) The Bonds shall be subject to redemption by the Authority, at the direction of the Company, on any date on or after October 1, 2020 in whole at any time or in part from time to time, at 100% of the principal amount thereof plus accrued interest, if any, to the redemption date.

A-2

(b) The Bonds shall be subject to redemption by the Authority, at the direction of the Company, in whole at any time at 100% of the principal amount thereof plus accrued interest, if any, to the redemption date, if:

(i) the Company shall have determined that the continued operation of the Facilities is impracticable, uneconomical or undesirable for any reason;

(ii) all or substantially all of the Facilities shall have been condemned or taken by eminent domain; or

(iii) the operation of the Facilities shall have been enjoined or shall have otherwise been prohibited by, or shall conflict with, any order, decree, rule or regulation of any court or of any federal, state or local regulatory body, administrative agency or other governmental body.

(c) The Bonds shall be subject to mandatory redemption by the Authority, at 100% of the principal amount thereof plus accrued interest to the redemption date, on the 180th day (or such earlier date as may be designated by the Company) after a final determination by a court of competent jurisdiction or an administrative agency, to the effect that, as a result of a failure by the Company to perform or observe any covenant, agreement or representation contained in the Loan Agreement, the interest payable on the Bonds is included for federal income tax purposes in the gross income of the owners thereof, other than any owner of a Bond who is a “substantial user” of the Facilities or a “related person” within the meaning of Section 147(a) of the Internal Revenue Code of 1986 (the “Code”). No determination by any court or administrative agency shall be considered final for the purposes of this paragraph (c) unless the Company shall have been given timely notice of the proceeding which resulted in such determination and an opportunity to participate in such proceeding, either directly or through an owner of a Bond, and until the conclusion of any appellate review sought by any party to such proceeding or the expiration of the time for seeking such review. The Bonds shall be redeemed either in whole or in part in such principal amount that, in the opinion of Bond Counsel, the interest payable on the Bonds, including the Bonds remaining outstanding after such redemption, would not be included in the gross income of any owner thereof, other than an owner of a Bond who is a “substantial user” of the Facilities or a “related person” within the meaning of Section 147(a) of the Code.

(d) In the event that the aggregate of the amounts, if any, of the proceeds of the Bonds remaining unexpended upon the completion of the Facilities or upon the termination of the acquisition and construction thereof, together with any income or other gain from the investment thereof, shall at any time, or from time to time, be equal to or greater than $5,000, the Authority shall redeem the Bonds, at the principal amount thereof plus accrued interest to the redemption date, in the largest aggregate principal amount which does not exceed the amount of such proceeds together with income or other gain on an interest payment date determined as set forth in, and otherwise in accordance with the provisions of, the Indenture; provided, however, that the Company may direct that such proceeds and income be applied to the purchase of the Bonds or in any other manner which will not impair the validity of the Bonds or the exemption from gross income for federal tax purposes of the interest thereon.

A-3

If less than all of the Bonds at the time outstanding are to be called for redemption, the particular Bonds or portions of Bonds to be redeemed shall be selected by the Trustee, in such manner as the Trustee in its discretion may deem proper, in the principal amounts designated to the Trustee by the Company or otherwise as required by the Indenture.

In the event any of the Bonds are called for redemption, the Trustee shall give notice, in the name of the Authority, of the redemption of such Bonds. Such notice shall be given by electronic means or by mailing a copy of the redemption notice by first class mail at least twenty (20) days prior to the date fixed for redemption to the Registered Owners of the Bonds to be redeemed at the addresses shown on the registration books; provided, however, that failure duly to give such notice, or any defect therein, shall not affect the validity of any proceedings for the redemption of the Bonds as to which there shall be no such failure or defect.

With respect to any notice of redemption of Bonds in accordance with the redemption provisions lettered (a) or (b) above, unless, upon the giving of such notice, such Bonds shall be deemed to have been paid within the meaning of the Indenture, such notice shall state that such redemption, shall be conditional upon the receipt, by the Trustee on or prior to the opening of business on the date fixed for such redemption of moneys sufficient to pay the principal of and interest on such Bonds to be redeemed, and that if such moneys shall not have been so received said notice shall be of no force and effect and the Authority shall not be required to redeem such Bonds. In the event that such notice of redemption contains such a condition and such moneys are not so received, the redemption shall not be made and the Trustee shall within a reasonable time thereafter give notice, in the manner in which the notice of redemption was given, that such moneys were not so received. Any notice of redemption may also contain such other conditions as the Company shall specify and may be rescinded by the Company in accordance with the provisions of the Indenture.

If a notice of redemption shall be unconditional, or if the conditions of a conditional notice of redemption shall have been satisfied, then upon presentation and surrender of Bonds so called for redemption at the place or places of payment, such Bonds shall be redeemed.

Any Bonds and portions of Bonds which have been duly selected for redemption shall cease to bear interest on the specified redemption date provided that moneys sufficient to pay the principal of and interest on such Bonds shall be on deposit with the Trustee on the date fixed for redemption so that such Bonds will be deemed to be paid in accordance with the Indenture and such Bonds shall thereafter cease to be entitled to any lien, benefit or security under the Indenture.

The Registered Owner of this Bond shall have no right to enforce the provisions of the Indenture, or to institute action to enforce the covenants therein, or to take any action with respect to any default under the Indenture, or to institute, appear in or defend any suit or other proceeding with respect thereto, except as provided in the Indenture.

A-4

With certain exceptions as provided therein, the Indenture and the Loan Agreement may be modified or amended only with the consent of the Registered Owners of a majority in aggregate principal amount of all Bonds outstanding under the Indenture which would be adversely affected thereby.

Reference is hereby made to the Indenture and the Loan Agreement, copies of which are on file with the Trustee, for the provisions, among others, with respect to the nature and extent of the rights, duties and obligations of the Authority, the Company, the Trustee and the Registered Owners of the Bonds. The Registered Owner of this Bond, by the acceptance hereof, is deemed to have agreed and consented to the terms and provisions of the Indenture and the Loan Agreement.

Among other things, as provided in the Indenture and subject to certain limitations therein set forth, this Bond or any portion of the principal amount hereof will be deemed to have been paid within the meaning and with the effect expressed in the Indenture, and the entire indebtedness of the Authority in respect thereof shall be satisfied and discharged, if there has been irrevocably deposited with the Trustee, in trust, money in an amount which will be sufficient and/or Government Obligations, the principal of and interest on which, when due, without regard to any reinvestment thereof, will provide moneys which, together with moneys deposited with or held by the Trustee, will be sufficient, to pay when due the principal of and interest on this Bond or such portion of the principal amount hereof when due.

Among other things, the Loan Agreement contains terms, provisions and conditions relating to the consolidation or merger of the Company with or into, and the sale, transfer or other disposition of assets to, another Person, to the assumption by such other Person, in certain circumstances, of all of the obligations of the Company under the Loan Agreement and to the release and discharge of the Company, in certain circumstances, from such obligations.

The Authority and the Trustee may deem and treat the person in whose name this Bond is registered as the absolute owner hereof for all purposes, whether or not this Bond is overdue, and neither the Authority nor the Trustee shall be affected by any notice to the contrary; provided that if the Company is the sole Owner of this Bond, the Authority and the Trustee may deem and treat the Company as the absolute owner for all purposes.

It is hereby certified, recited and declared that all acts, conditions and things required by the Constitution and laws of the State of Arizona to exist, to have happened and to have been performed, precedent to and in the execution and delivery of the Indenture and the issuance of this Bond, do exist, have happened and have been performed in regular and due form as required by law.

No covenant or agreement contained in this Bond or the Indenture shall be deemed to be a covenant or agreement of any official, officer, agent or employee of the Authority in his individual capacity, and neither the members of the Board of Directors of the Authority, nor any official executing this Bond, shall be liable personally on this Bond or be subject to any personal liability or accountability by reason of the issuance or sale of this Bond.

This Bond shall not be entitled to any right or benefit under the Indenture, or be valid or become obligatory for any purpose, until this Bond shall have been authenticated by the execution by the Trustee of the certificate of authentication inscribed hereon.

A-5

IN WITNESS WHEREOF, The Industrial Development Authority of The County of Pima has caused this Bond to be executed with the manual or facsimile signature of its President or Vice President and attested with the manual or facsimile signature of its Secretary or Assistant Secretary.

THE INDUSTRIAL DEVELOPMENT AUTHORITY OF THE COUNTY OF PIMA
By:
	President

ATTEST:

Secretary

A-6

EXHIBIT B

(FORM FOR ORDINARY REGISTRATION OF TRANSFER)

COMPLETE AND SIGN THIS FORM FOR ORDINARY
REGISTRATION OF TRANSFER

FOR VALUE RECEIVED, the undersigned hereby sell(s), assign(s) and transfer(s) unto

Please Insert Social Security Or Other Identifying Number of Assignee

Please print or typewrite name and address including postal zip code of assignee

this bond and all rights thereunder, hereby irrevocably constituting and appointing                      attorney to register such transfer on the registration books in the principal office of the Trustee, with full power of substitution in the premises.

Dated:
	NOTE: The signature on this assignment must correspond with the name as written on the face of this Bond in every particular, without alteration, enlargement or any change whatsoever.

B-1

EXHIBIT C

(FORM OF TRUSTEE’S CERTIFICATE OF AUTHENTICATION)

CERTIFICATE OF AUTHENTICATION

This is to certify that this Bond is one of the Bonds described in the within-mentioned Indenture.

U.S. BANK TRUST NATIONAL ASSOCIATION, as Trustee
By:
	Authorized Officer

Date of Authentication:                                              

C-1

EXHIBIT D

REQUISITION NO. ___
The Industrial Development Authority of the County of Pima Industrial Development
Revenue Bonds, 2010 Series A (Tucson Electric Power Company Project)
Construction Fund

The undersigned,                     , hereby certifies as follows:

1. I am the                      of Tucson Electric Power Company, a corporation organized and existing under the laws of the State of Arizona (the “Company”).

2. Pursuant to the provisions of that certain Indenture of Trust, dated as of October 1, 2010 (the “Indenture”), between The Industrial Development Authority of the County of Pima (the “Authority”) and U.S. Bank Trust National Association, as trustee (the “Trustee”), I am an Authorized Company Representative (as such term is defined in the Indenture) and I am delivering this Requisition on behalf of the Company.

3. The undersigned, acting on behalf of the Company, does hereby request disbursement of funds from The Industrial Development Authority of the County of Pima Industrial Development Revenue Bonds, 2010 Series A (Tucson Electric Power Company Project) Construction Fund (the “Construction Fund”) created and established pursuant to Section 5.01 of the Indenture.

TOTAL DISBURSEMENT AMOUNT REQUESTED: $                    .

4. The undersigned, acting on behalf of the Company, hereby certifies: (a) that each obligation, item of cost or expense with respect to which this Requisition is being made has been properly incurred and has been paid or is now due and payable as an item of the Cost of Construction (as such term is defined in the Indenture), is a proper charge against the Construction Fund, and has not been the basis of any previous final payment from the Construction Fund or from the proceeds of any other obligations issued by the Authority; (b) that the payment of this Requisition will not result in a breach of any of the covenants of the Company contained in Section 4.04 (c) or (d) of the Loan Agreement, dated as of October 1, 2010 (the “Loan Agreement”), between the Authority and the Company; and (c) that, to the best of the knowledge of such Authorized Company Representative, there shall not have occurred and be continuing any event of default under the Loan Agreement.

D-1

5. Payment should be made in accordance with the instructions set forth on Schedule I hereto.

Dated:                                         .

Tucson Electric Power Company
By:
	Authorized Company Representative

D-2

SCHEDULE I

The Industrial Development Authority of the County of Pima Industrial Development
Revenue Bonds, 2010 Series A (Tucson Electric Power Company Project)
Construction Fund

Name and Address of
Party To	Payment	Nature of	Payment
Be Paid	Amount	Expenditure	Instructions

D-3

EX-4.(B)

Exhibit 4(b)

LOAN AGREEMENT
2010 SERIES A

BETWEEN

THE INDUSTRIAL DEVELOPMENT AUTHORITY
OF THE COUNTY OF PIMA

AND

TUCSON ELECTRIC POWER COMPANY

DATED AS OF OCTOBER 1, 2010

RELATING TO

INDUSTRIAL DEVELOPMENT REVENUE BONDS,
2010 SERIES A
(TUCSON ELECTRIC POWER COMPANY PROJECT)

TABLE OF CONTENTS^*

	Page
ARTICLE I
DEFINITIONS
SECTION 1.01 Definitions		1
ARTICLE II
REPRESENTATIONS AND WARRANTIES
SECTION 2.01 Representations and Warranties of the Authority		1
SECTION 2.02 Representations and Warranties of the Company		2
ARTICLE III
THE FACILITIES
SECTION 3.01 Facilities; Property of the Company		3
SECTION 3.02 Construction of the Facilities		3
SECTION 3.03 Insufficient Moneys in Construction Fund		3
SECTION 3.04 Revision of Plans and Specifications		3
SECTION 3.05 Certification of Completion Date		4
SECTION 3.06 Maintenance of Facilities; Remodeling		4
SECTION 3.07 Insurance		4
SECTION 3.08 Condemnation		5
SECTION 3.09 Termination of Construction		5
ARTICLE IV
ISSUANCE OF THE BONDS; THE LOAN; DISPOSITION OF PROCEEDS OF THE BONDS
SECTION 4.01 Issuance of the Bonds		5
SECTION 4.02 Issuance of Other Obligations		5
SECTION 4.03 The Loan; Disposition of Bond Proceeds		5
SECTION 4.04 Disbursements from Construction Fund		6
SECTION 4.05 Investment of Moneys in Funds and Accounts		7

^* This table of contents is not part of the Loan Agreement, and is for convenience only. The captions herein are of no legal effect and do not vary the meaning or legal effect of any part of the Loan Agreement.

i

	Page
ARTICLE V
LOAN PAYMENTS; OTHER OBLIGATIONS
SECTION 5.01 Loan Payments		7
SECTION 5.02 Payments Assigned; Obligation Absolute		7
SECTION 5.03 Payment of Expenses		8
SECTION 5.04 Indemnification		8
SECTION 5.05 Payment of Taxes; Discharge of Liens		9
ARTICLE VI
SPECIAL COVENANTS
SECTION 6.01 Maintenance of Legal Existence		9
SECTION 6.02 Permits or Licenses		10
SECTION 6.03 Authority’s Access to Facilities		10
SECTION 6.04 Tax-Exempt Status of Interest on Bonds		10
SECTION 6.05 Use of Facilities		11
SECTION 6.06 Financing Statements		12
ARTICLE VII
ASSIGNMENT, LEASING AND SELLING
SECTION 7.01 Conditions		12
SECTION 7.02 Instrument Furnished to the Authority and Trustee		14
SECTION 7.03 Limitation		14
ARTICLE VIII
EVENTS OF DEFAULT AND REMEDIES
SECTION 8.01 Events of Default		14
SECTION 8.02 Force Majeure		15
SECTION 8.03 Remedies		15
SECTION 8.04 No Remedy Exclusive		16
SECTION 8.05 Reimbursement of Attorneys’ and Agents’ Fees		16
SECTION 8.06 Waiver of Breach		16
ARTICLE IX
REDEMPTION OF BONDS
SECTION 9.01 Redemption of Bonds		16
SECTION 9.02 Compliance with the Indenture		17

ii

	Page
ARTICLE X MISCELLANEOUS
SECTION 10.01 Term of Agreement		17
SECTION 10.02 Notices		17
SECTION 10.03 Parties in Interest		17
SECTION 10.04 Amendments		18
SECTION 10.05 Counterparts		18
SECTION 10.06 Severability		18
SECTION 10.07 Governing Law		18
SECTION 10.08 Notice Regarding Cancellation of Contracts		18
Exhibit A — Description of the Facilities		A-1

iii

LOAN AGREEMENT

THIS LOAN AGREEMENT (2010 Series A), dated as of October 1, 2010 (this “Agreement”), between THE INDUSTRIAL DEVELOPMENT AUTHORITY OF THE COUNTY OF PIMA, an Arizona nonprofit corporation designated by law as a political subdivision of the State of Arizona (hereinafter called the “Authority”), and TUCSON ELECTRIC POWER COMPANY, a corporation organized and existing under the laws of the State of Arizona (hereinafter called the “Company”),

W I T N E S S E T H:

WHEREAS, the Authority is authorized and empowered under Title 35, Chapter 5, Arizona Revised Statutes, as amended (the “Act”), to issue its bonds in accordance with the Act and to make secured or unsecured loans for the purpose of financing or refinancing the acquisition, construction, improvement or equipping of projects consisting of land, any building or other improvement, and all real and personal properties, including machinery and equipment, whether or not now in existence or under construction, whether located within or without the State of Arizona or Pima County, which shall be suitable for, among other things, facilities for the furnishing of electric energy, gas or water, and to charge and collect interest on such loans and pledge the proceeds of loan agreements as security for the payment of the principal of and interest on bonds, or designated issues of bonds, issued by the Authority and any agreements made in connection therewith, whenever the Board of Directors of the Authority finds such loans to further advance the interest of the Authority or the public and in the public interest; and

WHEREAS, the Authority proposes to issue and sell its revenue bonds for the purpose of financing a portion of the costs of the acquisition, construction, improvement and equipping of certain of the facilities for furnishing electric energy described in Exhibit A hereto (the “Facilities”) pursuant to an Indenture of Trust, dated as of October 1, 2010 (the “Indenture”), between the Authority and U.S. Bank Trust National Association, as trustee (the “Trustee”);

NOW, THEREFORE, the parties hereto, intending to be legally bound hereby and in consideration of the premises, DO HEREBY AGREE as follows:

ARTICLE I

DEFINITIONS

SECTION 1.01 Definitions. The terms used in this Agreement shall for all purposes of this Agreement have the meanings specified in Section 1.01 of the Indenture, unless the context clearly requires otherwise:

ARTICLE II

REPRESENTATIONS AND WARRANTIES

SECTION 2.01 Representations and Warranties of the Authority. The Authority makes the following representations and warranties as the basis for the undertakings on the part of the Company contained herein:

(a) The Authority is an Arizona nonprofit corporation designated by law as a political subdivision of the State of Arizona created and existing under the Constitution and laws of the State of Arizona;

(b) The Authority has the power to enter into this Agreement and the Indenture and to perform and observe the agreements and covenants on its part contained herein and therein, including without limitation the power to issue and sell the Bonds as contemplated herein and in the Indenture, and by proper action has duly authorized the execution and delivery hereof and thereof; and

(c) The execution and delivery of this Agreement and the Indenture by the Authority do not, and consummation of the transactions contemplated hereby and fulfillment of the terms hereof and thereof by the Authority will not, result in a breach of any of the terms or provisions of, or constitute a default under, any indenture, mortgage, deed of trust or other agreement or instrument to which the Authority is now a party or by which it is now bound, or, to the best knowledge of the Authority, any order, rule or regulation applicable to the Authority of any court or of any regulatory body or administrative agency or other governmental body having jurisdiction over the Authority or over any of its properties, or the Constitution or laws of the State of Arizona.

SECTION 2.02 Representations and Warranties of the Company. The Company makes the following representations and warranties as the basis for the undertakings on the part of the Authority contained herein:

(a) The Company is a corporation duly organized and existing in good standing under the laws of the State of Arizona;

(b) The Company has power to enter into this Agreement and to perform and observe the agreements and covenants on its part contained herein and by proper corporate action has duly authorized the execution and delivery hereof and of all other documents required hereby to be executed by the Company;

(c) The execution and delivery of this Agreement by the Company do not, and consummation of transactions contemplated hereby and fulfillment of the terms hereof by the Company will not, result in a breach of any of the terms or provisions of, or constitute a default under, any indenture, mortgage, deed of trust or other agreement or instrument to which the Company is a party or by which it is now bound, or the Restated Articles of Incorporation or bylaws of the Company, or any order, rule or regulation applicable to the Company of any court or of any regulatory body or administrative agency or other governmental body having jurisdiction over the Company or over any of its properties, or any statute of any jurisdiction applicable to the Company;

2

(d) The Arizona Corporation Commission has approved all matters relating to the Company’s participation in the transactions contemplated by this Agreement which require said approval, and no other consent, approval, authorization or other order of any regulatory body or administrative agency or other governmental body is legally required for the Company’s participation therein, except such as may have been obtained or may be required under the securities laws of any jurisdiction;

(e) The Facilities are to be used solely for purposes contemplated by the Act and are located within the County of Pima, Arizona; and

(f) The Company estimates that all of the proceeds of the Bonds will be expended to pay the Cost of Construction.

ARTICLE III

THE FACILITIES

SECTION 3.01 Facilities; Property of the Company. The Facilities shall be the property of the Company and the Authority shall have no right, title or interest in the Facilities, nor any obligation regarding the Facilities.

SECTION 3.02 Construction of the Facilities. The Company shall cause the Facilities to be constructed with all reasonable dispatch in order to effectuate the purposes of the Act. The Company shall have the sole responsibility under this Agreement for the construction of the Facilities and may perform the same itself or through its agents, and may make or issue such contracts, orders, receipts and instructions, and in general do or cause to be done all such other things as it may in its sole discretion consider requisite or advisable for the construction of the Facilities and for fulfilling its obligations under this ARTICLE III. The Company shall have full authority and the sole right under this Agreement to supervise and control, directly or indirectly, all aspects of the construction of the Facilities.

SECTION 3.03 Insufficient Moneys in Construction Fund. If the moneys in the Construction Fund, together with any other moneys made available to pay the Cost of Construction, shall not be sufficient to pay the Cost of Construction in full, then the Company shall pay all that portion of the Cost of Construction in excess of the moneys available therefor.

The Authority does not make any warranty, either express or implied, that the moneys which will be paid into the Construction Fund will be sufficient to pay the Cost of Construction in full.

If the Company makes any payments pursuant to this Section 3.03, it shall not be entitled to any reimbursement therefor from the Authority (except from the proceeds of any obligations subsequently issued by the Authority in respect of the Facilities), the Trustee or the Owners of the Bonds, nor shall it be entitled to any diminution in or postponement of the payment of the Loan Payments or the payment of any other amounts payable under this Agreement.

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SECTION 3.04 Revision of Plans and Specifications. The Company may cause one or more revisions to be made to the plans and specifications for the Facilities (including without limitation any changes therein, additions thereto, substitutions therefor and deletions therefrom), at any time and from time to time prior to the Completion Date in any respect; provided, however, that, if any such revision shall render inaccurate the description of the Facilities contained in Exhibit A hereto, the Company shall deliver to the Authority and the Trustee (a) a revised Exhibit A containing a description of the Facilities as revised, the accuracy of which shall have been certified by an Authorized Company Representative, and (b) an opinion of Bond Counsel to the effect that the Facilities as described in the revised Exhibit A are such that the expenditure of the proceeds of the Bonds pursuant to this Agreement will not, in and of itself, impair the validity of the Bonds under the Act or the exclusion from gross income for federal tax purposes of interest on the Bonds. A revision of Exhibit A hereto pursuant to this Section 3.04 shall not constitute an amendment, change or modification of this Agreement within the meaning of Article XII of the Indenture.

SECTION 3.05 Certification of Completion Date. The Completion Date shall be the date on which the Facilities are completed in their entirety and ready to be placed in service and operated, all as determined by the Company. Promptly after the Completion Date, the Company shall submit to the Authority and the Trustee a certificate, executed by an Authorized Company Representative, which shall specify the Completion Date and shall state that (a) construction of the Facilities has been completed and the Cost of Construction has been paid, except for any portion thereof which has been incurred but is not then due and payable, or the liability for the payment of which is being contested or disputed by the Company, and for the payment of which the Trustee is directed to retain specified amounts of moneys in specified accounts within the Construction Fund, and (b) the Facilities are suitable for operation for the purposes for which they were designed. Notwithstanding the foregoing, such certificate may state that it is given without prejudice to any rights against third parties which exist at the date thereof or which may subsequently come into being.

SECTION 3.06 Maintenance of Facilities; Remodeling. The Company shall at all times cause the Facilities, and every element and unit thereof, to be maintained, preserved and kept in thorough repair, working order and condition and cause all needful and proper repairs and renewals thereto to be made; provided, however, that the Company may cause the operation of the Facilities, or any element or unit thereof, to be discontinued if, in the judgment of the Company, it is no longer advisable to operate the same, or if the Company intends to sell or dispose of the same and within a reasonable time shall endeavor to effectuate such sale or disposition.

After the Completion Date, the Company may, subject to the provisions of Section 6.05 hereof, at its own expense remodel the Facilities or make such substitutions, modifications and improvements to the Facilities from time to time as it, in its discretion, may deem to be desirable for its uses and purposes, which remodeling, substitutions, modifications and improvements shall be included under the terms of this Agreement as part of the Facilities.

SECTION 3.07 Insurance. The Company shall keep the Facilities insured against fire and other risks to the extent usually insured against by companies owning and operating similar property, by reputable insurance companies or, at the Company’s election, with respect to all or any element or unit of the Facilities, by means of an adequate insurance fund set aside and maintained by it out of its own earnings or in conjunction with other companies through an insurance fund, trust or other agreement or, by means of unfunded self-insurance as may be reasonable and customary by companies owning and operating similar property. All proceeds of such insurance shall be for the account of the Company.

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SECTION 3.08 Condemnation. The Company shall be entitled to the entire proceeds of any condemnation award or portion thereof made for damages to or takings of the Facilities or other property of the Company.

SECTION 3.09 Termination of Construction. (a) Anything in this Agreement to the contrary notwithstanding, the Company shall have the right at any time to terminate the construction of the Facilities, in whole, if the Company shall have determined that the continued construction or operation of the Facilities, in whole, is impracticable, uneconomical or undesirable for any reason.

(b) Promptly after the termination of the construction of the Facilities financed with the proceeds of the Bonds, the Company shall submit to the Authority and the Trustee a certificate, executed by an Authorized Company Representative, which shall state the reasons for such termination and shall state that the Cost of Construction, to the extent of the construction of the Facilities as of the date of such termination, has been paid, except for any Cost of Construction which have been incurred but are not then due and payable, or the liability for the payment of which is being contested or disputed by the Company, and for the payment of which the Trustee is directed to retain specified amounts of moneys in the Construction Fund. Notwithstanding the foregoing, such certificate may state that it is given without prejudice to any rights against third parties which exist at the date thereof or which may subsequently come into being.

ARTICLE IV

ISSUANCE OF THE BONDS; THE LOAN; DISPOSITION OF PROCEEDS
OF THE BONDS

SECTION 4.01 Issuance of the Bonds. The Authority shall issue the Bonds under and in accordance with the Indenture, subject to the provisions of the bond purchase agreement among the Authority, the initial purchaser or purchasers of the Bonds and the Company. The Company hereby approves the issuance of the Bonds and all terms and conditions thereof.

SECTION 4.02 Issuance of Other Obligations. The Authority and the Company expressly reserve the right to enter into, to the extent permitted by law, but shall not be obligated to enter into, an agreement or agreements other than this Agreement with respect to the issuance by the Authority, under an indenture or indentures other than the Indenture, of obligations to provide additional funds to pay the Cost of Construction of the Facilities or obligations to refund all or any principal amount of the Bonds, or any combination thereof.

SECTION 4.03 The Loan; Disposition of Bond Proceeds. The Authority shall lend to the Company the proceeds of the issuance and sale of the Bonds for the purposes specified in this Agreement, such proceeds to be applied as hereinafter and in the Indenture provided.

The Authority shall establish the Bond Fund and the Construction Fund with the Trustee in accordance with Sections 4.01 and 5.01 of the Indenture. The proceeds of the issuance and sale of the Bonds shall be deposited into the Construction Fund in accordance with the provisions of the Indenture.

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The moneys on deposit in the Construction Fund shall be applied by the Trustee as provided in Section 4.04 hereof and as otherwise provided in Article V of the Indenture. Until the moneys on deposit in the Construction Fund are so applied, such moneys shall be and remain the property of the Authority, subject to the lien of the Indenture, and the Company shall have no right, title or interest therein except as expressly provided in this Agreement and the Indenture. However, in order to secure the payment by the Company of the Loan Payments, and the payment by the Authority of the principal of and interest on the Bonds, and the performance and observance by the Company and the Authority of all covenants and conditions expressed herein and in the Indenture and contained in the Bonds, the Company hereby mortgages, pledges, assigns, creates and grants a security interest in and confirms to the Trustee such right, title and interest as the Company may be deemed to have or hereafter acquire in the proceeds of the issuance and sale of the Bonds to be deposited into the Construction Fund and the proceeds from the investment and reinvestment thereof, upon terms and conditions co-extensive with those set forth in the Indenture with respect to the lien and security interest of the Trustee in the Trust Estate (as defined in the Indenture).

SECTION 4.04 Disbursements from Construction Fund. (a) To the extent that moneys on deposit in the Construction Fund shall not otherwise have been applied in accordance with the provisions of Article V of the Indenture, such moneys shall be loaned to the Company to reimburse the Company for portions of the Cost of Construction paid by it or to make payments to persons designated by the Company in respect of portions of the Cost of Construction, upon receipt by the Trustee of requisitions executed by, or communications by telegram, e-mail in PDF format or facsimile transmission from, an Authorized Company Representative, which requisitions or communications shall state with respect to each payment to be made: (i) the requisition number, (ii) the name and address of the person, firm or corporation to whom payment is due or has been made (or, in the case of payments to the Bond Fund, instructions to make such payments thereto), (iii) the amount paid or to be paid, (iv) (A) that each obligation, item of cost or expense with respect to which such requisition is being made has been properly incurred and has been paid or is then due and payable as an item of the Cost of Construction, is a proper charge against the Construction Fund, and has not been the basis of any previous final payment therefrom or from the proceeds of any other obligations issued by the Authority or (B) in the event that a portion of the Bonds shall have been paid, redeemed or deemed to have been paid within the meaning of Article VIII of the Indenture by reason of the application of the proceeds of the sale of any obligations issued under an indenture other than the Indenture and if the payment of such requisition is to be made into the construction, acquisition or other similar fund created under such other indenture, that upon disbursement from such construction, acquisition or other similar fund, each obligation, item of cost or expense mentioned in the requisition for such disbursement substantially in the form attached as Exhibit D to the Indenture, will have been properly incurred and will have been paid or will then be due and payable as an item of the Cost of Construction, will be a proper charge against the construction, acquisition or other similar fund under such indenture, and will not have been the basis of any previous final payment therefrom or from the proceeds of any other revenue bonds issued by the Authority, (v) that the payment of such requisition will not result in a breach of any of the covenants of the Company contained in subsection (c) or (d) of this Section 4.04 and (vi) that, to the best of the knowledge of such Authorized Company Representative, there shall not have occurred and be continuing any Event of Default described in Section 8.01 hereof. Any such communication by telegram, e-mail or facsimile transmission shall be promptly confirmed by a requisition executed by an Authorized Company Representative. The Company shall furnish to the Authority a copy of each requisition delivered to the Trustee promptly upon request therefor.

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(b) In paying any requisition under this Section 4.04, the Trustee shall be entitled to conclusively rely as to the completeness and accuracy of all statements in such requisition upon the approval of such requisition by an Authorized Company Representative, execution thereof to be conclusive evidence of such approval, and the Company shall indemnify and save harmless the Authority and the Trustee from any liability incurred in connection with any requisition so executed by an Authorized Company Representative.

(c) The Company shall submit requisitions for Costs of Construction in compliance with the requirements therefor contained in the Tax Agreement.

(d) The Company shall not submit or cause to be submitted to the Trustee any requisition pursuant to this Section 4.04, and shall have no claim upon any moneys in the Construction Fund, so long as there shall have occurred and be continuing any Event of Default described in Section 8.01 hereof.

SECTION 4.05 Investment of Moneys in Funds and Accounts. The Company and the Authority agree that any moneys held in any fund or account created by the Indenture shall be invested as provided in the Indenture.

ARTICLE V

LOAN PAYMENTS; OTHER OBLIGATIONS

SECTION 5.01 Loan Payments. In consideration of the issuance of the Bonds and the disposition of the proceeds thereof as contemplated in Section 4.03 hereof, the Company shall pay, or cause to be paid, to the Trustee for the account of the Authority an amount equal to the aggregate principal amount of the Bonds from time to time Outstanding and, as interest on its obligation to pay such amount, an amount equal to interest on such Bonds, such amounts to be paid in installments due on the dates, in the amounts and in the manner provided in the Indenture for the Authority to cause amounts to be deposited in the Bond Fund for the payment of the principal of and interest on the Bonds whether at stated maturity, upon redemption or acceleration or otherwise; provided, however, that the obligation of the Company to make any such payment hereunder shall be reduced by the amount of any reduction under the Indenture of the amount of the corresponding payment required to be made by the Authority thereunder.

SECTION 5.02 Payments Assigned; Obligation Absolute. It is understood and agreed that all Loan Payments are, by the Indenture, to be pledged by the Authority to the Trustee, and that all rights and interest of the Authority hereunder (except for the Authority’s rights under Section 5.03, Section 5.04, Section 6.03 and Section 8.05 hereof and any rights of the Authority to receive notices, certificates, requests, requisitions and other communications hereunder) are to be pledged and assigned to the Trustee. The Company assents to such pledge and assignment and agrees that the obligation of the Company to make the Loan Payments shall be absolute, irrevocable and unconditional and shall not be subject to cancellation, termination or abatement, or to any defense other than

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payment or to any right of set off, counterclaim or recoupment arising out of any breach by the Authority or the Trustee or any other party under this Agreement, the Indenture or otherwise, or out of any obligation or liability at any time owing to the Company by the Authority, the Trustee or any other party, and, further, that the Loan Payments and the other payments due hereunder shall continue to be payable at the times and in the amounts herein and therein specified, whether or not the Facilities, or any portion thereof, shall have been completed or shall have been destroyed by fire or other casualty, or title thereto, or the use thereof, shall have been taken by the exercise of the power of eminent domain, and that there shall be no abatement of or diminution in any such payments by reason thereof, whether or not the Facilities shall be used or useful, whether or not any applicable laws, regulations or standards shall prevent or prohibit the use of the Facilities, or for any other reason, all of the foregoing being subject, however, to the provisions of Section 6.01 and Section 7.01 hereof.

SECTION 5.03 Payment of Expenses. The Company shall pay, or, to the extent permitted by this Agreement, cause to be paid out of the Construction Fund, all Administration Expenses, including, without limitation, Administration Expenses incurred at and subsequent to the time the Bonds are deemed to have been paid in accordance with Article VIII of the Indenture. The payment of the compensation and the reimbursement of expenses and advances of the Trustee under the Indenture shall be made directly to such entity.

SECTION 5.04 Indemnification. The Company releases the Authority, the Trustee, the County of Pima, Arizona and their directors, officers, employees and agents from, agrees that the Authority, the Trustee and the County of Pima, Arizona shall not be liable for, and agrees to indemnify and hold the Authority, the Trustee, the County of Pima, Arizona and their directors, officers, employees and agents free and harmless from, any liability (including, without limitation, attorneys’ and other agents’ fees and expenses) for any loss or damage to property or any injury to or death of any person that may be occasioned by any cause whatsoever pertaining to the Facilities, except (i) in the case of the Trustee, as a result of the negligence or willful misconduct of the Trustee or its directors, officers, employees and agents; and (ii) in the case of the Authority and the County of Pima, Arizona, as a result of gross negligence or willful misconduct of the Authority or the County of Pima, Arizona or their directors, officers, employees and agents.

The Company will indemnify and hold the Authority, the Trustee and the County of Pima, Arizona, free and harmless from any loss, claim, damage, tax, penalty, liability, disbursement, litigation expenses, attorneys’ and other agents’ fees and expenses or court costs arising out of, or in any way relating to, the execution or performance of this Agreement, the issuance or sale of the Bonds, actions taken under the Indenture or any other cause whatsoever pertaining to the Facilities, except (i) in the case the Trustee, as a result of the negligence or willful misconduct of the Trustee; and (ii) in the case of the Authority and the County of Pima, Arizona, as a result of gross negligence or willful misconduct of the Authority or the County of Pima, Arizona.

The Company will indemnify and hold the Authority and the County of Pima, Arizona and their directors, officers, employees and agents free and harmless from any loss, claim, damage, tax, penalty, liability, disbursement, litigation expenses, attorney’s fees and expenses or court costs arising out of or in any way relating to any untrue statement or alleged untrue statement of any material fact or omission or alleged omission to state a material fact necessary to make the statements made, in light of the circumstances under which they were made, not misleading in any official statement or other offering material utilized in connection with the sale of any Bonds.

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SECTION 5.05 Payment of Taxes; Discharge of Liens. The Company shall: (a) pay, or make provision for payment of, all lawful taxes and assessments, including income, profits, property or excise taxes, if any, or other municipal or governmental charges, levied or assessed by any federal, state or municipal government or political body upon the Facilities or any part thereof or upon the Authority with respect to the Loan Payments, when the same shall become due; and (b) pay or cause to be satisfied and discharged or make adequate provision to satisfy and discharge, within sixty (60) days after the same shall accrue, any lien or charge upon the Loan Payments, and all lawful claims or demands for labor, materials, supplies or other charges which, if unpaid, might be or become a lien upon such amounts; provided, that, if the Company shall first notify the Authority and the Trustee of its intention so to do, the Company may in good faith contest any such lien or charge or claims or demands in appropriate legal proceedings, and in such event may permit the items so contested and identified as such by the Company to remain undischarged and unsatisfied during the period of such contest and any appeal therefrom, unless the Trustee shall notify the Company in writing that, in the opinion of counsel to the Trustee, based upon material facts disclosed to the Trustee without any duty of investigation, by nonpayment of any such items the lien of the Indenture as to the Loan Payments will be materially endangered, in which event the Company shall promptly pay and cause to be satisfied and discharged all such unpaid items. The Authority shall cooperate fully with the Company in any such contest.

ARTICLE VI

SPECIAL COVENANTS

SECTION 6.01 Maintenance of Legal Existence. Except as permitted in this Section 6.01, the Company shall maintain its legal existence, shall not sell, transfer or otherwise dispose of all of its assets, as or substantially as an entirety, and shall not consolidate with or merge with or into another entity. Unless such action would violate the Company’s covenant in Section 6.04, the Company may consolidate with or merge into another entity organized and existing under the laws of the United States of America, any state thereof or the District of Columbia, or sell, transfer or otherwise dispose of all of its assets, as or substantially as an entirety, to any Person, if the surviving or resulting Person (if other than the Company) or the transferee Person, as the case may be, prior to or simultaneously with such merger, consolidation, sale, transfer or disposition, assumes, by delivery to the Trustee and the Authority of an instrument in writing satisfactory in form to the Trustee, all the obligations of the Company under this Agreement, including, without limitation, the obligations of the Company under Section 5.01 hereof. Upon such an assumption following any such sale, transfer or other disposition of assets, the Company shall be released and discharged from all liability in respect of all obligations under this Agreement. Notwithstanding the foregoing, in the case of any such sale, transfer or other disposition of assets, which do not include the Facilities, the Company shall remain liable in respect of all obligations under this Agreement other than the obligations under Section 5.01 hereof, and the transferee shall not be required to assume any obligations hereunder other than the obligations under Section 5.01 hereof; provided, however, that the transferee shall be required to assume all such other obligations unless the Company shall have delivered to the Authority and the Trustee an opinion of Bond Counsel to the effect that the non-assumption by the transferee of such other obligations will not impair the validity under the Act of the Bonds and will not adversely affect the exclusion from gross income for federal tax purposes of interest on the Bonds.

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If consolidation, merger or sale, transfer or other disposition is made as permitted by this Section 6.01, the provisions of this Section 6.01 shall continue in full force and effect and no further consolidation, merger or sale or other transfer shall be made except in compliance with the provisions of this Section 6.01.

Anything in this Agreement to the contrary notwithstanding, the sale, transfer or other disposition by the Company of all of its facilities (a) for the generation of electric energy, (b) for the transmission of electric energy or (c) for the distribution of electric energy, in each case considered alone, or all of its facilities described in clauses (a) and (b), considered together, or all of its facilities described in clauses (b) and (c), considered together, shall in no event be deemed to constitute a sale, transfer or other disposition of all the properties of the Company, as or substantially as an entirety, unless, immediately following such sale, transfer or other disposition, the Company shall own no properties in the other such categories of property not so sold, transferred or otherwise disposed of. The character of particular facilities shall be determined by reference to the Uniform System of Accounts prescribed for public utilities and licensees subject to the Federal Power Act, as amended, to the extent applicable.

SECTION 6.02 Permits or Licenses. In the event that it may be necessary for the proper performance of this Agreement on the part of the Company or the Authority that any application or applications for any permit or license to do or to perform certain things be made to any governmental or other agency by the Company or the Authority, the Company and the Authority each shall, upon the request of either, execute such application or applications.

SECTION 6.03 Authority’s Access to Facilities. The Authority shall have the right, upon appropriate prior notice to the Company, to have reasonable access to the Facilities during normal business hours for the purpose of making examinations and inspections of the same.

SECTION 6.04 Tax-Exempt Status of Interest on Bonds.

(a) It is the intention of the parties hereto that interest on the Bonds shall be and remain tax-exempt, and to that end the covenants and agreements of the Authority and the Company in this Section 6.04 and the Tax Agreement are for the benefit of the Owners from time to time of the Bonds.

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(b) Each of the Company and the Authority covenants and agrees for the benefit of the Owners from time to time of the Bonds that it will not directly or indirectly use or permit the use of (to the extent within its control) the proceeds of any of the Bonds or any other funds, or take or omit to take any action, if and to the extent such use, or the taking or omission to take such action, would cause any of the Bonds to be “arbitrage bonds” within the meaning of Section 148 of the Code or otherwise subject to federal income taxation by reason of failing to qualify under Section 103 and Sections 141 through 150 of the Code and any applicable regulations promulgated thereunder. To such ends, the Authority and the Company will comply with all requirements of such Section 148 to the extent applicable to the Bonds. In the event that at any time the Authority or the Company is of the opinion that for purposes of this Section 6.04(b) it is necessary to restrict or limit the yield on the investment of any moneys held by the Trustee under the Indenture, the Authority or the Company shall so notify the Trustee in writing.

Without limiting the generality of the foregoing, the Company and the Authority agree that there shall be paid from time to time all amounts required to be rebated to the United States of America pursuant to Section 148(f) of the Code and any applicable Treasury Regulations. This covenant shall survive payment in full or defeasance of the Bonds and the satisfaction and discharge of the Indenture. The Company specifically covenants to pay or cause to be paid the Rebate Requirement as defined and described in the Tax Agreement.

(c) The Authority certifies and represents that it has not taken, and the Authority covenants and agrees that it will not take, any action which results in interest paid on the Bonds being included in gross income of the Owners of the Bonds for federal tax purposes pursuant to Section 1.03 of the Code, as applicable; and the Company certifies and represents that it has not taken or (to the extent within its control) permitted to be taken, and the Company covenants and agrees that it will not take or (to the extent within its control) permit to be taken any action which will cause the interest on the Bonds to become includable in gross income for federal income tax purposes pursuant to Section 1.03 of the Code; provided, however, that neither the Company nor the Authority shall be deemed to have violated these covenants if the interest on any of the Bonds becomes taxable to a person solely because such person is a “substantial user” of the Facilities or a “related person” within the meaning of Section 147(a) of the Code and provided, further, that none of the covenants and agreements herein contained shall require either the Company or the Authority to enter an appearance or intervene in any administrative, legislative or judicial proceeding in connection with any changes in applicable laws, rules or regulations or in connection with any decisions of any court or administrative agency or other governmental body affecting the taxation of interest on the Bonds. The Company acknowledges having read Section 7.08 of the Indenture and agrees to perform all duties imposed on it by such Section 7.08, by this Section 6.04 and by the Tax Agreement. Insofar as Section 7.08 of the Indenture and the Tax Agreement, as amended from time to time, impose duties and responsibilities on the Company, they are specifically incorporated herein by reference.

(d) Notwithstanding any provision of this Section 6.04 and Section 7.08 of the Indenture, if the Company shall provide to the Authority and the Trustee an opinion of Bond Counsel to the effect that any specified action required under this Section 6.04 and Section 7.08 of the Indenture is no longer required or that some further or different action is required to maintain the exclusion from gross income of interest on the Bonds for federal income tax purposes, the Company, the Trustee and the Authority may conclusively rely upon such opinion in complying with the requirements of this Section 6.04, and the covenants hereunder shall be deemed to be modified to that extent.

SECTION 6.05 Use of Facilities. So long as any Bonds are Outstanding and the Facilities are operated by or for the benefit of the Company, the Company shall cause the Facilities to be used for purposes contemplated by the Act and in the Tax Agreement.

SECTION 6.06 Financing Statements. The Company shall file and record, or cause to be filed and recorded, all financing statements and continuation statements referred to in Section 7.07 of the Indenture.

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ARTICLE VII

ASSIGNMENT, LEASING AND SELLING

SECTION 7.01 Conditions. The Company’s interest in this Agreement may be assigned as a whole or in part, and its interest in the Facilities may be leased, sold, transferred or otherwise disposed of by the Company as a whole or in part (whether an interest in a specific element or unit or an undivided interest), to any Person; provided, however, that no such assignment, lease, sale, transfer or other disposition (a) shall relieve the Company from its primary liability for its obligations under Section 5.01 hereof or (b) shall be made unless the assignee, lessee, purchaser or other transferee, as the case may be, prior to or simultaneously with such assignment, lease, sale, transfer or other disposition, assumes, by delivery of an instrument in writing satisfactory in form to the Trustee and the Authority, all other obligations of the Company hereunder to the extent of the interest assigned, leased, sold, transferred or otherwise disposed of, and the Company shall be released of and discharged from such obligations to the extent so assumed. Notwithstanding the foregoing, (a) if (i) the Company’s interest in this Agreement shall be assigned as a whole or in undivided part, (ii) the Company’s interest in the Facilities shall be leased as a whole or in undivided part and the term of such leasehold or the term of any extension or extensions thereof at the option of the Company shall extend beyond the maturity date of the Bonds or (iii) the Company’s interest in the Facilities shall be sold, transferred or otherwise disposed of as a whole or in undivided part, and (b) in the event that the assignee, lessee, purchaser or other transferee shall assume the obligations of the Company under Section 5.01 hereof for the remaining term of this Agreement, to the extent of such assignment, lease, sale, transfer or other disposition, the Company shall be released from and discharged of all liability in respect of such obligations to the extent so assumed (but only to such extent); provided, however, that the release and discharge of the Company pursuant to clause (b) shall be conditioned upon the delivery by the Company to the Authority and the Trustee of a certificate of an Independent Expert (as hereinafter defined) describing the interests so assigned, leased, sold, transferred or otherwise disposed of, together with all other rights, interests, assets and/or properties assigned, leased, sold, transferred or otherwise disposed of by the Company to the same Person in the same or a related transaction, stating that such rights, interests, assets and/or properties so described constitute facilities for the generation, transmission and/or distribution of electric energy and stating that, in the opinion of such Independent Expert, the Fair Value (as hereinafter defined) of such rights, interests, assets and/or properties to the Person acquiring the same is not less than an amount equal to 10/7 of the sum of (x) the aggregate principal amount of the Bonds then Outstanding and (y) the outstanding principal amount of all other obligations of the Company representing indebtedness for borrowed money or for the deferred purchase price of property which are being assumed by such Person; provided, further, that after any such assumption, release and discharge as aforesaid, the Company may again assume such obligations under Section 5.01 hereof, in whole or in part, at any time and from time to time, and, to the extent of any such assumption by the Company (but only to such extent), the aforesaid assignee, lessee, purchaser or other transferee shall be released from and discharged of all liability in respect of such obligations.

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Anything herein to the contrary notwithstanding, the Company shall not make any assignment, lease or sale as provided in the immediately preceding paragraph unless it shall have furnished to the Authority and the Trustee an opinion of Bond Counsel to the effect that the proposed assignment, lease or sale will not impair the validity under the Act of the Bonds and will not adversely affect the exclusion of interest on the Bonds from gross income for federal tax purposes.

After any lease, sale, transfer or other disposition of any element or unit of the Facilities, or any interest therein, the Company may, at its option, cause such element or unit, or interest therein, to no longer be deemed to be part of the Facilities for the purposes of this Agreement by delivering to the Authority and the Trustee the agreements or other documents required pursuant to Section 7.02 hereof together with an instrument signed by an Authorized Company Representative stating that such element or unit, or interest therein, shall no longer be deemed to be part of the Facilities for the purposes of this Agreement.

For purposes of this Section 7.01:

(a) “Independent Expert” means a Person which (i) is an engineer, appraiser or other expert and which, with respect to any certificate to be delivered pursuant to this Section, is qualified to pass upon the matter set forth in such certificate and (ii)(A) is in fact independent, (B) does not have any direct material financial interest in the transferee or in any obligor upon the Bonds or under this Agreement or in any affiliate of the transferee or any such obligor, (C) is not connected with the transferee or any such obligor as an officer, employee, promoter, underwriter, trustee, partner, director or any person performing similar functions and (D) is approved by the Trustee in the exercise of reasonable care; for purposes of this definition “engineer” means a Person engaged in the engineering profession or otherwise qualified to pass upon engineering matters (including, but not limited to, a Person licensed as a professional engineer, whether or not then engaged in the engineering profession); and for purposes of this definition “appraiser” means a Person engaged in the business of appraising property or otherwise qualified to pass upon the Fair Value or fair market value of property.

(b) “Fair Value” means the fair value of the interests, rights, assets and/or properties assigned, leased, sold, transferred or otherwise disposed of (but, in the case of a lease, only to the extent of such lease) as may be determined by reference to (i) except in the case of a lease, the amount which would be likely to be obtained in an arm’s-length transaction with respect to such interests, rights, assets and/or properties between an informed and willing buyer and an informed and willing seller, under no compulsion, respectively, to buy or sell, (ii) in the case of a lease, the amount (discounted to present value at a rate not lower than the taxable equivalent of the yield to maturity of the Bonds based on prevailing market prices immediately prior to the first public announcement of the proposed transaction) which would be likely to be obtained in an arm’s-length transaction with respect to such interests, rights, assets and/or properties between an informed and willing lessee and an informed and willing lessor, neither under any compulsion to lease; (iii) the amount of investment with respect to such interests, rights, assets and/or properties which, together with a reasonable return thereon, would be likely to be recovered through ordinary business operations

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or otherwise, (iv) the cost, accumulated depreciation and replacement cost with respect to such interests, rights, assets and/or properties and/or (v) any other relevant factors; provided, however, that (x) Fair Value shall be determined without deduction for any mortgage, deed of trust, pledge, security interest, encumbrance, lease, reservation, restriction, servitude, charge or similar right or any other lien of any kind and (y) the Fair Value to the transferee of any property shall not reflect any reduction relating to the fact that such property may be of less value to a Person which is not the owner, lessee or operator of the property or any portion thereof than to a Person which is such owner, lessee or operator. Fair Value may be determined, without physical inspection, by the use of accounting and engineering records and other data maintained by the Company or the transferee or otherwise available to the Independent Expert certifying the same.

SECTION 7.02 Instrument Furnished to the Authority and Trustee. The Company shall, within fifteen (15) days after the delivery thereof, furnish to the Authority and the Trustee a true and complete copy of the agreements or other documents effectuating any such assignment, lease, sale, transfer or other disposition.

SECTION 7.03 Limitation. This Agreement shall not be assigned nor shall the Facilities be leased, sold, transferred or otherwise disposed of, in whole or in part, except as provided in this ARTICLE VII or in Section 6.01 or Section 5.02 hereof. This ARTICLE VII shall not apply to any sale, transfer or other disposition by the Company of all of its assets, as or substantially as an entirety, as contemplated in Section 6.01.

ARTICLE VIII

EVENTS OF DEFAULT AND REMEDIES

SECTION 8.01 Events of Default. Each of the following events shall constitute and is referred to in this Agreement as an “Event of Default”:

(a) a failure by the Company to make any Loan Payment, which failure shall have resulted in an “Event of Default” under clause (a) or (b) of Section 9.01 of the Indenture;

(b) a failure by the Company to pay when due any amount required to be paid under this Agreement or to observe and perform any covenant, condition or agreement on its part to be observed or performed (other than a failure described in clause (a) above), which failure shall continue for a period of sixty (60) days after written notice, specifying such failure and requesting that it be remedied, shall have been given to the Company by the Authority or the Trustee, unless the Authority and the Trustee shall agree in writing to an extension of such period prior to its expiration; provided, however, that the Authority and the Trustee shall be deemed to have agreed to an extension of such period if corrective action is initiated by the Company within such period and is being diligently pursued; or

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(c) the dissolution or liquidation of the Company, or failure by the Company promptly to lift any execution, garnishment or attachment of such consequence as will impair its ability to make any payments under this Agreement, or the entry of an order for relief by a court of competent jurisdiction in any proceeding for its liquidation or reorganization under the provisions of any bankruptcy act or under any similar act which may be hereafter enacted, or an assignment by the Company for the benefit of its creditors, or the entry by the Company into an agreement of composition with its creditors (the term “dissolution or liquidation of the Company,” as used in this clause, shall not be construed to include the cessation of the corporate existence of the Company resulting either from a merger or consolidation of the Company into or with another entity or a dissolution or liquidation of the Company following a transfer of all or substantially all its assets as an entirety, under the conditions permitting such actions contained in Section 6.01 hereof).

SECTION 8.02 Force Majeure. The provisions of Section 8.01 hereof are subject to the following limitations: if by reason of acts of God; strikes, lockouts or other industrial disturbances; acts of public enemies; orders of any kind of the government of the United States or of the State of Arizona, or any department, agency, political subdivision, court or official of any of them, or any civil or military authority; insurrections; riots; epidemics; landslides; lightning; earthquakes; volcanoes; fires; hurricanes; tornadoes; storms; floods; washouts; droughts; arrests; restraint of government and people; civil disturbances; explosions; breakage or accident to machinery; partial or entire failure of utilities; or any cause or event not reasonably within the control of the Company, the Company is unable in whole or in part to carry out any one or more of its agreements or obligations contained herein, other than its obligations under Section 5.01, Section 5.03, Section 5.05 and Section 6.01 hereof, the Company shall not be deemed in default by reason of not carrying out said agreement or agreements or performing said obligation or obligations during the continuance of such inability. The Company shall make reasonable effort to remedy with all reasonable dispatch the cause or causes preventing it from carrying out its agreements; provided, that the settlement of strikes, lockouts and other industrial disturbances shall be entirely within the discretion of the Company, and the Company shall not be required to make settlement of strikes, lockouts and other industrial disturbances by acceding to the demands of the opposing party or parties when such course is in the judgment of the Company unfavorable to the Company.

SECTION 8.03 Remedies. (a) Upon the occurrence and continuance of any Event of Default described in clause (a) of Section 8.01 hereof, and further upon the condition that, in accordance with the terms of the Indenture, the Bonds shall have been declared to be immediately due and payable pursuant to any provision of the Indenture, the Loan Payments shall, without further action, become and be immediately due and payable.

Any waiver of any “Event of Default” under the Indenture and a rescission and annulment of its consequences shall constitute a waiver of the corresponding Event or Events of Default under this Agreement and a rescission and annulment of the consequences thereof.

(b) Upon the occurrence and continuance of any Event of Default, the Authority, or the Trustee with respect to the rights of the Authority assigned to the Trustee by the Indenture, may take any action at law or in equity to collect any payments then due and thereafter to become due, or to enforce performance and observance of any obligation, agreement or covenant of the Company hereunder.

(c) Any amounts collected by the Trustee from the Company pursuant to this Section 8.03 shall be applied in accordance with the Indenture.

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SECTION 8.04 No Remedy Exclusive. No remedy conferred upon or reserved to the Authority hereby is intended to be exclusive of any other available remedy or remedies, but each and every such remedy shall be cumulative and shall be in addition to every other remedy given hereunder or now or hereafter existing at law or in equity or by statute. No delay or omission to exercise any right or power accruing upon any default shall impair any such right or power or shall be construed to be a waiver thereof, but any such right or power may be exercised from time to time and as often as may be deemed expedient. In order to entitle the Authority to exercise any remedy reserved to it in this ARTICLE VIII, it shall not be necessary to give any notice, other than such notice as may be herein expressly required.

SECTION 8.05 Reimbursement of Attorneys’ and Agents’ Fees. If the Company shall default under any of the provisions hereof and the Authority or the Trustee shall employ attorneys or agents or incur other reasonable expenses for the collection of payments due hereunder or for the enforcement of performance or observance of any obligation or agreement on the part of the Company contained herein, the Company will on demand therefor reimburse the Authority or the Trustee and any predecessor Trustee, as the case may be, for the reasonable fees of such attorneys and such other reasonable expenses so incurred.

SECTION 8.06 Waiver of Breach. In the event any obligation created hereby shall be breached by either of the parties and such breach shall thereafter be waived by the other party, such waiver shall be limited to the particular breach so waived and shall not be deemed to waive any other breach hereunder. In view of the assignment of certain of the Authority’s rights and interest hereunder to the Trustee, the Authority shall have no power to waive any breach hereunder by the Company in respect of such rights and interest without the consent of the Trustee, and the Trustee may exercise any of such rights of the Authority hereunder.

ARTICLE IX

REDEMPTION OF BONDS

SECTION 9.01 Redemption of Bonds. The Authority shall take, or cause to be taken, the actions required by the Indenture to discharge the lien created thereby through the redemption, or provision for payment or redemption, of all Bonds then Outstanding, or to effect the redemption, or provision for payment or redemption, of less than all the Bonds then Outstanding, upon receipt by the Authority and the Trustee from the Company of a notice designating the principal amount of the Bonds to be redeemed, or for the payment or redemption of which provision is to be made, and, in the case of redemption of Bonds, or provision therefor, specifying the date of redemption and the applicable redemption provision of the Indenture. Such redemption date shall not be less than twenty-five (25) days from the date such notice is given (unless a shorter notice is satisfactory to the Trustee). Unless otherwise stated therein, such notice shall be revocable by the Company at any time prior to the time at which the Bonds to be redeemed, or for the payment or redemption of which provision is to be made, are first deemed to be paid in accordance with Article VIII of the Indenture. The Company shall furnish any moneys or Government Obligations (as defined in the Indenture) required by the Indenture to be deposited with the Trustee or otherwise paid by the Authority in connection with any of the foregoing purposes.

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SECTION 9.02 Compliance with the Indenture. Anything in this Agreement to the contrary notwithstanding, the Authority and the Company shall take all actions required by this Agreement and the Indenture in order to comply with any provisions of the Indenture requiring the mandatory redemption of Bonds.

ARTICLE X

MISCELLANEOUS

SECTION 10.01 Term of Agreement. This Agreement shall remain in full force and effect from the date hereof until the right, title and interest of the Trustee in and to the Trust Estate (as defined in the Indenture) shall have ceased, terminated and become void in accordance with Article VIII of the Indenture and until all payments required under this Agreement shall have been made. Notwithstanding the foregoing, the covenants contained in Section 5.03, Section 5.04, Section 6.04 and Section 8.05 hereof shall survive the termination of this Agreement.

SECTION 10.02 Notices. Except as otherwise provided in this Agreement, all notices, certificates, requests, requisitions and other communications hereunder shall be in writing and shall be sufficiently given and shall be deemed given when mailed by registered mail, postage prepaid, addressed as follows: if to the Authority, c/o Russo, Russo & Slania, P.C., 6700 North Oracle Road, Suite 100, Tucson, Arizona 85704; if to the Company, at One South Church Avenue, Suite 100, Tucson, Arizona 85701, Attention: Treasurer; and if to the Trustee, at such address as shall be designated by it in the Indenture. A copy of each notice, certificate, request or other communication given hereunder to the Authority, the Company, or the Trustee shall also be given to the others. The Authority, the Company, and the Trustee may, by notice given hereunder, designate any further or different addresses to which subsequent notices, certificates, requests or other communications shall be sent. Notwithstanding any other provision of this Agreement to the contrary, any notice required to be delivered hereunder may be delivered by electronic means including, without limitation, email in PDF format.

SECTION 10.03 Parties in Interest. This Agreement shall inure to the benefit of and shall be binding upon the Authority, the Company and their respective successors and assigns, and no other person, firm or corporation shall have any right, remedy or claim under or by reason of this Agreement; provided, however, that the lien and security interest granted to the Trustee in Section 4.03 hereof, as well as the rights and remedies granted to the Authority in Article VIII hereof, shall inure to the benefit of the Trustee, on behalf of the Owners from time to time of the Bonds, and shall be enforceable by the Trustee as a third party beneficiary or as assignee of the Authority; and provided, further, that neither Pima County, Arizona nor the State of Arizona shall in any event be liable for the payment of the principal of or premium, if any, or interest on the Bonds or for the performance of any pledge, mortgage, obligation or agreement created by or arising out of this Agreement or the issuance of the Bonds, and further that neither the Bonds nor any such obligation or agreement of the Authority shall be construed to constitute an indebtedness of Pima County, Arizona or the State of Arizona within the meaning of any constitutional or statutory provisions whatsoever, but shall be limited obligations of the Authority payable solely out of the revenues derived from this Agreement, or from the sale of the Bonds, or from the investment or reinvestment of any of the foregoing, as provided herein and in the Indenture.

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SECTION 10.04 Amendments. This Agreement may be amended only by written agreement of the parties hereto, subject to the limitations set forth herein and in the Indenture.

SECTION 10.05 Counterparts. This Agreement may be executed in any number of counterparts, each of which, when so executed and delivered, shall be an original; but such counterparts shall together constitute but one and the same Agreement.

SECTION 10.06 Severability. If any clause, provision or section of this Agreement shall, for any reason, be held illegal or invalid by any court, the illegality or invalidity of such clause, provision or section shall not affect any of the remaining clauses, provisions or sections hereof, and this Agreement shall be construed and enforced as if such illegal or invalid clause, provision or section had not been contained herein. In case any agreement or obligation contained in this Agreement be held to be in violation of law, then such agreement or obligation shall be deemed to be the agreement or obligation of the Authority or the Company, as the case may be, to the full extent permitted by law.

SECTION 10.07 Governing Law. The laws of the State of Arizona shall govern the construction and enforcement of this Agreement, except that the provisions of Section 13.09 of the Indenture, construed as provided in Section 13.07 of the Indenture, shall apply to this Agreement as if contained herein.

SECTION 10.08 Notice Regarding Cancellation of Contracts. As required by the provisions of Section 38-511, Arizona Revised Statutes, as amended, notice is hereby given that political subdivisions of the State of Arizona or any of their departments or agencies may, within three (3) years of its execution, cancel any contract, without penalty or further obligation, made by the political subdivisions or any of their departments or agencies on or after September 30, 1988, if any person significantly involved in initiating, negotiating, securing, drafting or creating the contract on behalf of the political subdivisions or any of their departments or agencies is, at any time while the contract or any extension of the contract is in effect, an employee or agent of any other party to the contract in any capacity or a consultant to any other party of the contract with respect to the subject matter of the contract. The cancellation shall be effective when written notice from the chief executive officer or governing body of the political subdivision is received by all other parties to the contract unless the notice specifies a later time.

The Company covenants and agrees not to employ as an employee, agent or, with respect to the subject matter of this Agreement, a consultant, any person significantly involved in initiating, negotiating, securing, drafting or creating such Agreement on behalf of the Authority within three (3) years from the execution hereof, unless a waiver is provided by the Authority.

[Remainder of Page Intentionally Left Blank]

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IN WITNESS WHEREOF, the parties hereto have caused this Loan Agreement to be duly executed as of the day and year first above written.

THE INDUSTRIAL DEVELOPMENT AUTHORITY
OF THE COUNTY OF PIMA
By:	/s/ Stanley Lehman
	Name:	Stanley Lehman
	Title:	President
TUCSON ELECTRIC POWER COMPANY
By:	/s/ Kentton C. Grant
	Name:	Kentton C. Grant
	Title:	Vice President and Treasurer

Signature Page to Loan Agreement

EXHIBIT A

A portion of the costs of the acquisition, construction, improvement or equipping of the following Facilities will be financed with the proceeds of The Industrial Development Authority of the County of Pima Industrial Development Revenue Bonds, 2010 Series A (Tucson Electric Power Company Project) issued by The Industrial Development Authority of the County of Pima and referred to in the foregoing Loan Agreement.

Certain additions and improvements to Tucson Electric Power Company’s lower voltage electric transmission and distribution system in the City of Tucson and environs in Pima County, more particularly described in the Tax Certificate and Agreement, dated October 5, 2010, between The Industrial Development Authority of the County of Pima and Tucson Electric Power Company.

A-1