EXHIBIT 3.1

AMENDED AND RESTATED

CERTIFICATE OF INCORPORATION

OF

SPECTRA ENERGY CORP

Pursuant to Sections 242 and 245 of the General

Corporation Law of the State of Delaware

Spectra Energy Corp, a corporation organized and existing under the laws of the State of Delaware (the “Corporation”), DOES HEREBY CERTIFY AS FOLLOWS:

1. The name of the corporation is Spectra Energy Corp. The name under which the corporation was originally incorporated was Gas SpinCo, Inc. The name of the corporation was changed to Spectra Energy Corp on November 8, 2006. The original Certificate of Incorporation was filed with the Secretary of State of the State of Delaware on July 28, 2006.

2. This Amended and Restated Certificate of Incorporation, having been duly adopted in accordance with Sections 242 and 245 of the General Corporation Law of the State of Delaware (the “DGCL”) and by the unanimous written consent of the stockholders of the Corporation in accordance with Section 228 of the DGCL, restates and integrates and further amends the provisions of the Certificate of Incorporation as amended or supplemented heretofore. As so restated and integrated and further amended, the Amended and Restated Certificate of Incorporation (hereinafter, this “Certificate of Incorporation”) reads as follows:

ARTICLE FIRST

Name

The name of the corporation is “Spectra Energy Corp”.

ARTICLE SECOND

Registered Office

The address of the registered office of the Corporation in the State of Delaware is 1209 Orange Street, City of Wilmington, County of New Castle. The name of the registered agent of the Corporation at such address is The Corporation Trust Company.

ARTICLE THIRD

Purpose

The purpose of the Corporation is to engage in any lawful act or activity for which a corporation may be organized under the DGCL.

ARTICLE FOURTH

Capital Stock

(a) The aggregate number of shares of stock that the Corporation shall have authority to issue is one billion twenty-two million (1,022,000,000) shares, consisting of one billion (1,000,000,000) shares of Common Stock, par value $0.001 per share (the “Common Stock”), and twenty-two million (22,000,000) shares of Preferred Stock, par value $0.001 per share (the “Preferred Stock”).

(b) The Board of Directors of the Corporation shall have the full authority permitted by law, at any time and from time to time, to divide the authorized and unissued shares of Preferred Stock into one or more classes or series and, with respect to each such class or series, to determine by resolution or resolutions the number of shares constituting such class or series and the designation of such class or series, the voting powers, if any, of the shares of such class or series, and the preferences and relative, participating, optional or other special rights, if any, and any qualifications, limitations or restrictions thereof, of the shares of any such class or series of Preferred Stock to the full extent now or hereafter permitted by the law of the State of Delaware. The powers, preferences and relative, participating, optional and other special rights of each class or series of Preferred Stock and the qualifications, limitations or restrictions thereof, if any, may differ from those of any and all other classes or series at any time outstanding.

(c) Subject to applicable law and the rights, if any, of the holders of any class or series of Preferred Stock or any class or series of stock having a preference over or the right to participate with the Common Stock with respect to the payment of dividends, dividends may be declared and paid on the Common Stock at such times and in such amounts as the Board of Directors of the Corporation in its discretion shall determine. Nothing in this ARTICLE FOURTH shall limit the power of the Board of Directors to create a class or series of Preferred Stock with dividends the rate of which is calculated by reference to, and the payment of which is concurrent with, dividends on shares of Common Stock.

(d) In the event of the voluntary or involuntary liquidation, dissolution or winding up of the Corporation, subject to the rights of the holders of any class or series of the Preferred Stock, the net assets of the Corporation available for distribution to

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stockholders of the Corporation shall be distributed pro rata to the holders of the Common Stock in accordance with their respective rights and interests. If the assets of the Corporation are not sufficient to pay the amounts, if any, owing to holders of shares of Preferred Stock in full, holders of all shares of Preferred Stock will participate in the distribution of assets ratably in proportion to the full amounts to which they are entitled or in such order or priority, if any, as will have been fixed in the resolution or resolutions providing for the issue of the class or series of Preferred Stock. Neither the merger or consolidation of the Corporation into or with any other corporation, nor a sale, transfer or lease of all or part of its assets, will be deemed a liquidation, dissolution or winding up of the Corporation within the meaning of this paragraph, except to the extent specifically provided in any certificate of designation for any class or series of Preferred Stock. Nothing in this ARTICLE FOURTH shall limit the power of the Board of Directors to create a class or series of Preferred Stock for which the amount to be distributed upon any liquidation, dissolution or winding up of the Corporation is calculated by reference to, and the payment of which is concurrent with, the amount to be distributed to the holders of shares of Common Stock.

(e) Except as otherwise required by law, as otherwise provided herein or as otherwise determined by the Board of Directors as to the shares of any class or series of Preferred Stock, the holders of Preferred Stock shall have no voting rights and shall not be entitled to any notice of meetings of stockholders.

(f) Except as otherwise required by law and subject to the rights of the holders of any class or series of Preferred Stock, with respect to all matters upon which stockholders are entitled to vote or to which stockholders are entitled to give consent, the holders of any outstanding shares of Common Stock shall vote together as a class, and every holder of Common Stock shall be entitled to cast thereon one vote in person or by proxy for each share of Common Stock standing in such holder’s name on the books of the Corporation; provided, however, that, except as otherwise required by law, or unless provided in any certificate of designation for any class or series of Preferred Stock, holders of Common Stock, as such, shall not be entitled to vote on any amendment to this Certificate of Incorporation (including any certificate of designations relating to any class or series of Preferred Stock) that relates solely to the terms of one or more outstanding classes or series of Preferred Stock if the holders of such affected class or series are entitled, either separately or together with the holders of one or more other such classes or series, to vote thereon pursuant to this Certificate of Incorporation (including any certificate of designations relating to any class or series of Preferred Stock) or pursuant to applicable law. Subject to the rights of the holders of any class or series of Preferred Stock, stockholders of the Corporation shall not have any preemptive rights to subscribe for additional issues of stock of the Corporation and no stockholder will be permitted to cumulate votes at any election of directors.

ARTICLE FIFTH

Board of Directors

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(a) The business and affairs of the Corporation shall be managed by or under the direction of the Board of Directors.

(b) Except as otherwise fixed by or pursuant to provisions of ARTICLE FOURTH relating to the rights of the holders of any series of Preferred Stock, the number of directors of the Corporation shall be fixed from time to time by the Board of Directors in the manner provided in the By-Laws of the Corporation.

(c) The directors shall be divided into three classes, designated Class I, Class II and Class III. Each class shall consist, as nearly as may be possible, of one-third of the total number of directors constituting the entire Board of Directors. The initial division of the members of the Board of Directors into classes shall be made by the decision of the affirmative vote of a majority of the entire Board of Directors. The term of the initial Class I directors shall terminate on the date of the 2007 annual meeting; the term of the initial Class II directors shall terminate on the date of the 2008 annual meeting; and the term of the initial Class III directors shall terminate on the date of the 2009 annual meeting. At each succeeding annual meeting of stockholders beginning in 2007, successors to the class of directors whose term expires at that annual meeting shall be elected for a three-year term. If the number of directors is changed, any increase or decrease shall be apportioned among the classes so as to maintain the number of directors in each class as nearly equal as possible, and any additional director of any class elected to fill a vacancy resulting from an increase in such class shall hold office for a term that shall coincide with the remaining term of that class, but in no case will a decrease in the number of directors shorten the term of any incumbent director.

(d) Except as provided in Paragraph (e) of this Article FIFTH, directors shall be elected by a plurality of the votes of the shares present in person or represented by proxy at the meeting and entitled to vote on the election of directors. A director shall hold office until the annual meeting for the year in which his or her term expires and until his or her successor shall be elected and shall qualify, subject, however, to prior death, resignation, retirement, disqualification or removal from office.

(e) Subject to the terms of any one or more classes or series of Preferred Stock, any vacancy on the Board of Directors that results from an increase in the number of directors may be filled by a majority of the Board of Directors then in office, provided that a quorum is present, and any other vacancy occurring on the Board of Directors may be filled by a majority of the Board of Directors then in office, even if less than a quorum, or by a sole remaining director. Any director of any class elected to fill a vacancy resulting from an increase in the number of directors of such class shall hold office for a term that shall coincide with the remaining term of that class. Any director elected to fill a vacancy not resulting from an increase in the number of directors shall have the same remaining term as that of his predecessor. Except as otherwise required by applicable law and subject to the rights, if any, of the holders of shares of Preferred Stock then outstanding, any or all of the directors of the Corporation may be removed from office at any time, but only for cause and only by the affirmative vote of the holders of at least a majority of the combined voting power of the then outstanding shares of stock of all classes of the Corporation entitled to vote generally in the election of directors.

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Notwithstanding the foregoing, whenever the holders of any one or more classes or series of Preferred Stock issued by the Corporation shall have the right, voting separately by class or series, to elect directors at an annual or special meeting of stockholders, the election, term of office, filling of vacancies and other features of such directorships shall be governed by the terms of the resolution or resolutions adopted by the Board of Directors providing for the issuance of such class or series, and such directors so elected shall not be divided into classes pursuant to this Article FIFTH unless expressly provided by such terms.

(f) Election of directors need not be by written ballot unless the By-Laws so provide.

(g) In addition to the powers and authority hereinbefore or by statute expressly conferred upon them, the directors are hereby empowered to exercise all such powers and do all such acts and things as may be exercised or done by the Corporation, subject, nevertheless, to the provisions of the DGCL, this Certificate of Incorporation, and any By-Laws adopted by the stockholders; provided, however, that no By-Laws hereafter adopted by the stockholders shall invalidate any prior act of the directors which would have been valid if such By-Laws had not been adopted.

ARTICLE SIXTH

Action by Stockholders; Books of the Corporation

(a) Meetings of stockholders may be held within or without the State of Delaware, as the By-Laws may provide. The books of the Corporation may be kept (subject to any provision contained in the DGCL) outside the State of Delaware at such place or places as may be designated from time to time by the Board of Directors or in the By-Laws of the Corporation.

(b) Any action required or permitted to be taken at any Annual or Special Meeting of stockholders of the Corporation may be taken without a meeting, without prior notice and without a vote only if consent in writing setting forth the action so taken is signed by all the holders of the Corporation’s issued and outstanding capital stock entitled to vote thereon.

ARTICLE SEVENTH

Amendment of Certificate of Incorporation

The Corporation reserves the right to supplement, amend, alter, change or repeal any provision contained in this Certificate of Incorporation, in the manner now or hereafter prescribed by the laws of the State of Delaware and this Certificate of Incorporation, and all rights conferred upon stockholders, directors and officers herein are granted subject to this reservation. Notwithstanding the foregoing, this ARTICLE SEVENTH and sections (c), and (e) of ARTICLE FIFTH may not be supplemented, amended, altered, changed, or repealed in any respect, nor may any provision inconsistent

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therewith be adopted, unless such supplement, amendment, alteration, change or repeal is approved by the affirmative vote of the holders of at least 80% of the combined voting power of the then outstanding shares of stock of all classes of the Corporation entitled to vote generally in the election of directors, voting together as a single class.

ARTICLE EIGHTH

Amendment of By-Laws

In furtherance and not in limitation of the powers conferred upon it by law, the Board of Directors of the Corporation is expressly authorized to adopt, repeal, alter or amend the By-Laws of the Corporation. No By-Laws may be adopted, repealed, altered or amended in any manner that would be inconsistent with this Amended and Restated Certificate of Incorporation (as it may be adopted, repealed, altered or amended from time to time in accordance with ARTICLE SEVENTH).

ARTICLE NINTH

Limitation of Liability

Except to the extent elimination or limitation of liability is not permitted by applicable law, no director of the Corporation shall be personally liable to the Corporation or its stockholders for monetary damages for any breach of fiduciary duty in such capacity. Any repeal or modification of this ARTICLE NINTH by the stockholders of the Corporation shall not adversely affect any right or protection of a director of the Corporation existing at the time of such repeal or modification with respect to acts or omissions occurring prior to such repeal or modification.

ARTICLE TENTH

Liability of Stockholders

The holders of the capital stock of the Corporation shall not be personally liable for the payment of the Corporation’s debts, and the private property of the holders of the capital stock of the Corporation shall not be subject to the payment of debts of the Corporation to any extent whatsoever.

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IN WITNESS WHEREOF, the Corporation has caused this Amended and Restated Certificate of Incorporation to be executed in its corporate name this 12th day of December, 2006.

By:	/s/ William S. Garner, Jr.
Name: William S. Garner, Jr.
Title:    Secretary