FIRST AMENDED AND RESTATED AGREEMENT OF LIMITED PARTNERSHIP OF EL PASO PIPELINE PARTNERS, L.P.

FIRST AMENDED AND RESTATED

AGREEMENT OF LIMITED PARTNERSHIP

OF

TABLE OF CONTENTS

ARTICLE I DEFINITIONS			1
Section 1.1 Definitions			1
Section 1.2 Construction			25
ARTICLE II ORGANIZATION			26
Section 2.1 Formation			26
Section 2.2 Name			26
Section 2.3 Registered Office; Registered Agent; Principal Office; Other Offices			26
Section 2.4 Purpose and Business			26
Section 2.5 Powers			27
Section 2.6 Power of Attorney			27
Section 2.7 Term			28
Section 2.8 Title to Partnership Assets			28
Section 2.9 Certain Undertakings Relating to the Separateness of the Partnership			29
ARTICLE III RIGHTS OF LIMITED PARTNERS			30
Section 3.1 Limitation of Liability			30
Section 3.2 Management of Business			30
Section 3.3 Outside Activities of the Limited Partners			30
Section 3.4 Rights of Limited Partners			30
ARTICLE IV CERTIFICATES; RECORD HOLDERS; TRANSFER OF PARTNERSHIP INTERESTS; REDEMPTION OF PARTNERSHIP INTERESTS			31
Section 4.1 Certificates			31
Section 4.2 Mutilated, Destroyed, Lost or Stolen Certificates			32
Section 4.3 Record Holders			33
Section 4.4 Transfer Generally			33
Section 4.5 Registration and Transfer of Limited Partner Interests			33
Section 4.6 Transfer of the General Partner’s General Partner Interest			35
Section 4.7 Transfer of Incentive Distribution Rights			35
Section 4.8 Restrictions on Transfers			36
Section 4.9 Tax Certifications; Ineligible Holders; Citizenship Certificates; Non-citizen Assignees			37
Section 4.10 Redemption of Partnership Interests of Non-citizen and Ineligible Holders			39
ARTICLE V CAPITAL CONTRIBUTIONS AND ISSUANCE OF PARTNERSHIP INTERESTS			40
Section 5.1 Organizational Contributions			40
Section 5.2 Contributions by the General Partner and its Affiliates			41
Section 5.3 Contributions by Initial Limited Partners			41
Section 5.4 Interest and Withdrawal of Capital Contributions			42
Section 5.5 Capital Accounts			42
Section 5.6 Issuances of Additional Partnership Securities			45
Section 5.7 Conversion of Subordinated Units			46
Section 5.8 Limited Preemptive Right			47

Section 5.9   Splits and Combinations			47
Section 5.10 Fully Paid and Non-Assessable Nature of Limited Partner Interests			48
Section 5.11 Issuance of Class B Units in Connection with Reset of Incentive Distribution Rights			48
ARTICLE VI ALLOCATIONS AND DISTRIBUTIONS			50
Section 6.1 Allocations for Capital Account Purposes			50
Section 6.2 Allocations for Tax Purposes			59
Section 6.3 Requirement and Characterization of Distributions; Distributions to Record Holders			61
Section 6.4 Distributions of Available Cash from Operating Surplus			62
Section 6.5 Distributions of Available Cash from Capital Surplus			64
Section 6.6 Adjustment of Minimum Quarterly Distribution and Target Distribution Levels			64
Section 6.7 Special Provisions Relating to the Holders of Subordinated Units and Class B Units			65
Section 6.8 Special Provisions Relating to the Holders of Incentive Distribution Rights			66
Section 6.9 Entity-Level Taxation			66
ARTICLE VII MANAGEMENT AND OPERATION OF BUSINESS			67
Section 7.1 Management			67
Section 7.2 Certificate of Limited Partnership			69
Section 7.3 Restrictions on the General Partner’s Authority			69
Section 7.4 Reimbursement of the General Partner			70
Section 7.5 Outside Activities			71
Section 7.6 Loans from the General Partner; Loans or Contributions from the Partnership or Group Members			72
Section 7.7 Indemnification			73
Section 7.8 Liability of Indemnitees			74
Section 7.9 Resolution of Conflicts of Interest; Standards of Conduct and Modification of Duties			75
Section 7.10 Other Matters Concerning the General Partner			77
Section 7.11 Purchase or Sale of Partnership Securities			77
Section 7.12 Registration Rights of the General Partner and its Affiliates			78
Section 7.13 Reliance by Third Parties			81
ARTICLE VIII BOOKS, RECORDS, ACCOUNTING AND REPORTS			82
Section 8.1 Records and Accounting			82
Section 8.2 Fiscal Year			82
Section 8.3 Reports			82
ARTICLE IX TAX MATTERS			83
Section 9.1 Tax Returns and Information			83
Section 9.2 Tax Elections			83
Section 9.3 Tax Controversies			83
Section 9.4 Withholding			84

ARTICLE X ADMISSION OF PARTNERS			84
Section 10.1 Admission of Initial Limited Partners			84
Section 10.2 Admission of Substituted Limited Partners			84
Section 10.3 Admission of Successor General Partner			85
Section 10.4 Admission of Additional Limited Partners			85
Section 10.5 Amendment of Agreement and Certificate of Limited Partnership			86
ARTICLE XI WITHDRAWAL OR REMOVAL OF PARTNERS			86
Section 11.1 Withdrawal of the General Partner			86
Section 11.2 Removal of the General Partner			88
Section 11.3 Interest of Departing General Partner and Successor General Partner			88
Section 11.4 Termination of Subordination Period, Conversion of Subordinated Units and Extinguishment of Cumulative Common Unit Arrearages			90
Section 11.5 Withdrawal of Limited Partners			90
ARTICLE XII DISSOLUTION AND LIQUIDATION			90
Section 12.1 Dissolution			90
Section 12.2 Continuation of the Business of the Partnership After Dissolution			91
Section 12.3 Liquidator			91
Section 12.4 Liquidation			92
Section 12.5 Cancellation of Certificate of Limited Partnership			93
Section 12.6 Return of Contributions			93
Section 12.7 Waiver of Partition			93
Section 12.8 Capital Account Restoration			93
ARTICLE XIII AMENDMENT OF PARTNERSHIP AGREEMENT; MEETINGS; RECORD DATE			93
Section 13.1 Amendments to be Adopted Solely by the General Partner			93
Section 13.2 Amendment Procedures			95
Section 13.3 Amendment Requirements			95
Section 13.4 Special Meetings			96
Section 13.5 Notice of a Meeting			96
Section 13.6 Record Date			97
Section 13.7 Adjournment			97
Section 13.8 Waiver of Notice; Approval of Meeting; Approval of Minutes			97
Section 13.9 Quorum and Voting			97
Section 13.10 Conduct of a Meeting			98
Section 13.11 Action Without a Meeting			98
Section 13.12 Right to Vote and Related Matters			99
ARTICLE XIV MERGER, CONSOLIDATION OR CONVERSION			99
Section 14.1 Authority			99
Section 14.2 Procedure for Merger, Consolidation or Conversion			100
Section 14.3 Approval by Limited Partners			102
Section 14.4 Certificate of Merger			103
Section 14.5 Effect of Merger, Consolidation or Conversion			103

ARTICLE XV RIGHT TO ACQUIRE LIMITED PARTNER INTERESTS			104
Section 15.1 Right to Acquire Limited Partner Interests			104
ARTICLE XVI GENERAL PROVISIONS			105
Section 16.1 Addresses and Notices; Written Communications			105
Section 16.2 Further Action			106
Section 16.3 Binding Effect			106
Section 16.4 Integration			106
Section 16.5 Creditors			106
Section 16.6 Waiver			106
Section 16.7 Third-Party Beneficiaries			107
Section 16.8 Counterparts			107
Section 16.9 Applicable Law			107
Section 16.10 Invalidity of Provisions			107
Section 16.11 Consent of Partners			107
Section 16.12 Facsimile Signatures			107

FIRST AMENDED AND RESTATED AGREEMENT OF LIMITED
PARTNERSHIP OF EL PASO PIPELINE PARTNERS, L.P.

     THIS FIRST AMENDED AND RESTATED AGREEMENT OF LIMITED PARTNERSHIP OF EL PASO PIPELINE PARTNERS, L.P. dated as of November 21, 2007, is entered into by and between El Paso Pipeline GP Company, L.L.C., a Delaware limited liability company, as the General Partner, and El Paso Pipeline LP Holdings, L.L.C., a Delaware limited liability company (the “ Organizational Limited Partner ”), together with any other Persons who become Partners in the Partnership or parties hereto as provided herein. In consideration of the covenants, conditions and agreements contained herein, the parties hereto hereby agree as follows:

ARTICLE I

DEFINITIONS

      Section 1.1 Definitions .

     The following definitions shall be for all purposes, unless otherwise clearly indicated to the contrary, applied to the terms used in this Agreement.

     “ Acquisition ” means any transaction in which any Group Member acquires (through an asset acquisition, merger, stock acquisition or other form of investment) control over all or a portion of the assets, properties or business of another Person for the purpose of increasing the long-term operating capacity or asset base of the Partnership Group from the operating capacity or asset base of the Partnership Group existing immediately prior to such transaction.

     “ Additional Book Basis ” means the portion of any remaining Carrying Value of an Adjusted Property that is attributable to positive adjustments made to such Carrying Value as a result of Book-Up Events. For purposes of determining the extent that Carrying Value constitutes Additional Book Basis:

     (a) Any negative adjustment made to the Carrying Value of an Adjusted Property as a result of either a Book-Down Event or a Book-Up Event shall first be deemed to offset or decrease that portion of the Carrying Value of such Adjusted Property that is attributable to any prior positive adjustments made thereto pursuant to a Book-Up Event or Book-Down Event.

     (b) If Carrying Value that constitutes Additional Book Basis is reduced as a result of a Book-Down Event and the Carrying Value of other property is increased as a result of such Book-Down Event, an allocable portion of any such increase in Carrying Value shall be treated as Additional Book Basis; provided , that the amount treated as Additional Book Basis pursuant hereto as a result of such Book-Down Event shall not exceed the amount by which the Aggregate Remaining Net Positive Adjustments after such Book-Down Event exceeds the remaining Additional Book Basis attributable to all of the Partnership’s Adjusted Property after such Book-Down Event (determined without regard to the application of this clause (b) to such Book-Down Event).

     “ Additional Book Basis Derivative Items ” means any Book Basis Derivative Items that are computed with reference to Additional Book Basis. To the extent that the Additional Book Basis attributable to all of the Partnership’s Adjusted Property as of the beginning of any taxable period exceeds the Aggregate Remaining Net Positive Adjustments as of the beginning of such period (the “ Excess Additional Book Basis ”), the Additional Book Basis Derivative Items for such period shall be reduced by the amount that bears the same ratio to the amount of Additional Book Basis Derivative Items determined without regard to this sentence as the Excess Additional Book Basis bears to the Additional Book Basis as of the beginning of such period.

     “ Additional Limited Partner ” means a Person admitted to the Partnership as a Limited Partner pursuant to Section 10.4 and who is shown as such on the books and records of the Partnership.

     “ Adjusted Capital Account ” means the Capital Account maintained for each Partner as of the end of each fiscal year of the Partnership, (a) increased by any amounts that such Partner is obligated to restore under the standards set by Treasury Regulation Section 1.704-1(b)(2)(ii)(c) (or is deemed obligated to restore under Treasury Regulation Sections 1.704-2(g) and 1.704-2(i)(5)) and (b) decreased by (i) the amount of all losses and deductions that, as of the end of such fiscal year, are reasonably expected to be allocated to such Partner in subsequent years under Sections 704(e)(2) and 706(d) of the Code and Treasury Regulation Section 1.751-1(b)(2)(ii), and (ii) the amount of all distributions that, as of the end of such fiscal year, are reasonably expected to be made to such Partner in subsequent years in accordance with the terms of this Agreement or otherwise to the extent they exceed offsetting increases to such Partner’s Capital Account that are reasonably expected to occur during (or prior to) the year in which such distributions are reasonably expected to be made (other than increases as a result of a minimum gain chargeback pursuant to Section 6.1(d)(i) or 6.1(d)(ii)). The foregoing definition of Adjusted Capital Account is intended to comply with the provisions of Treasury Regulation Section 1.704-1(b)(2)(ii)(d) and shall be interpreted consistently therewith. The “Adjusted Capital Account” of a Partner in respect of a General Partner Unit, a Common Unit, a Subordinated Unit, a Class B Unit or an Incentive Distribution Right or any other Partnership Interest shall be the amount that such Adjusted Capital Account would be if such General Partner Unit, Common Unit, Subordinated Unit, Class B Unit, Incentive Distribution Right or other Partnership Interest were the only interest in the Partnership held by such Partner from and after the date on which such General Partner Unit, Common Unit, Class B Unit, Subordinated Unit, Incentive Distribution Right or other Partnership Interest was first issued.

     “ Adjusted Operating Surplus ” means, with respect to any period, (a) Operating Surplus generated with respect to such period, less (b) (i) any net increase in Working Capital Borrowings with respect to that period and (ii) any net decrease in cash reserves for Operating Expenditures with respect to such period not relating to an Operating Expenditure made with respect to such period, and plus (c) (i) any net decrease in Working Capital Borrowings with respect to that period, (ii) any net decrease made in subsequent periods in cash reserves for Operating Expenditures initially established with respect to such period to the extent such decrease results in a reduction in Adjusted Operating Surplus in subsequent periods pursuant to clause (b)(ii) above and (iii) any net increase in cash reserves for Operating Expenditures with respect to such period required by any debt instrument for the repayment of principal, interest or

premium. Adjusted Operating Surplus does not include that portion of Operating Surplus included in clause (a)(i) of the definition of Operating Surplus.

     “ Adjusted Property ” means any property the Carrying Value of which has been adjusted pursuant to Section 5.5(d)(i) or 5.5(d)(ii).

     “ Affiliate ” means, with respect to any Person, any other Person that directly or indirectly through one or more intermediaries controls, is controlled by or is under common control with, the Person in question. As used herein, the term “control” means the possession, direct or indirect, of the power to direct or cause the direction of the management and policies of a Person, whether through ownership of voting securities, by contract or otherwise.

     “ Aggregate Quantity of Class B Units ” has the meaning assigned to such term in Section 5.11.

     “ Aggregate Remaining Net Positive Adjustments ” means, as of the end of any taxable period, the sum of the Remaining Net Positive Adjustments of all the Partners.

     “ Agreed Allocation ” means any allocation, other than a Required Allocation, of an item of income, gain, loss or deduction pursuant to the provisions of Section 6.1, including a Curative Allocation (if appropriate to the context in which the term “ Agreed Allocation ” is used).

     “ Agreed Value ” of any Contributed Property means the fair market value of such property or other consideration at the time of contribution as determined by the General Partner. The General Partner shall use such method as it determines to be appropriate to allocate the aggregate Agreed Value of Contributed Properties contributed to the Partnership in a single or integrated transaction among each separate property on a basis proportional to the fair market value of each Contributed Property.

     “ Agreement ” means this First Amended and Restated Agreement of Limited Partnership of El Paso Pipeline Partners, L.P., as it may be amended, supplemented or restated from time to time.

     “ Assignee ” means a Person to whom one or more Limited Partner Interests have been transferred in a manner permitted under this Agreement and who has executed and delivered a Transfer Application, including a Taxation Certification, as required by this Agreement, but who has not been admitted as a Substituted Limited Partner.

     “ Associate ” means, when used to indicate a relationship with any Person, (a) any corporation or organization of which such Person is a director, officer or partner or is, directly or indirectly, the owner of 20% or more of any class of voting stock or other voting interest; (b) any trust or other estate in which such Person has at least a 20% beneficial interest or as to which such Person serves as trustee or in a similar fiduciary capacity; and (c) any relative or spouse of such Person, or any relative of such spouse, who has the same principal residence as such Person.

     “ Available Cash ” means, with respect to any Quarter ending prior to the Liquidation Date:

     (a) the sum of (i) all cash and cash equivalents of the Partnership Group (or the Partnership’s proportionate share of cash and cash equivalents in the case of Subsidiaries that are not wholly owned) on hand at the end of such Quarter, (ii) all cash and cash equivalents on hand on the date of determination of Available Cash resulting from cash distributions received after the end of such Quarter with respect to the Partnership Group’s ownership interests in CIG, SNG and any other Person in which the Partnership Group owns similarly structured ownership interests, which distributions are paid in respect of operations conducted by CIG, SNG or such Person, as the case may be, during such Quarter; and (iii) if the General Partner so determines, all or any portion of additional cash and cash equivalents of the Partnership Group (or the Partnership’s proportionate share of cash and cash equivalents in the case of Subsidiaries that are not wholly owned) on hand on the date of determination of Available Cash with respect to such Quarter resulting from Working Capital Borrowings made subsequent to the end of such Quarter, less

     (b) the amount of any cash reserves (or the Partnership’s proportionate share of cash reserves in the case of Subsidiaries that are not wholly owned) established by the General Partner to (i) provide for the proper conduct of the business of the Partnership Group (including reserves for future capital expenditures, for anticipated future credit needs of the Partnership Group and for refunds of collected rates reasonably likely to be refunded as a result of a settlement or hearing relating to FERC rate proceedings) subsequent to such Quarter, (ii) comply with applicable law or any loan agreement, security agreement, mortgage, debt instrument or other agreement or obligation to which any Group Member is a party or by which it is bound or its assets are subject or (iii) provide funds for distributions under Section 6.4 or 6.5 in respect of any one or more of the next four Quarters;

provided, however , that the General Partner may not establish cash reserves pursuant to (iii) above if the effect of establishing such reserves would be that the Partnership is unable to distribute the Minimum Quarterly Distribution on all Common Units, plus any Cumulative Common Unit Arrearage on all Common Units, with respect to such Quarter; and, provided further , that disbursements made by a Group Member or cash reserves established, increased or reduced after the end of such Quarter but on or before the date of determination of Available Cash with respect to such Quarter shall be deemed to have been made, established, increased or reduced, for purposes of determining Available Cash, within such Quarter if the General Partner so determines.

     Notwithstanding the foregoing, “Available Cash” with respect to the Quarter in which the Liquidation Date occurs and any subsequent Quarter shall equal zero.

     “ Board of Directors ” means the board of directors or managers of a corporation or limited liability company or the board of directors or board of managers of the general partner of a limited partnership, as applicable.

     “ Book Basis Derivative Items ” means any item of income, deduction, gain or loss included in the determination of Net Income or Net Loss that is computed with reference to the

Carrying Value of an Adjusted Property (e.g., depreciation, depletion, or gain or loss with respect to an Adjusted Property).

     “ Book-Down Event ” means an event that triggers a negative adjustment to the Capital Accounts of the Partners pursuant to Section 5.5(d).

     “ Book-Tax Disparity ” means with respect to any item of Contributed Property or Adjusted Property, as of the date of any determination, the difference between the Carrying Value of such Contributed Property or Adjusted Property and the adjusted basis thereof for federal income tax purposes as of such date. A Partner’s share of the Partnership’s Book-Tax Disparities in all of its Contributed Property and Adjusted Property will be reflected by the difference between such Partner’s Capital Account balance as maintained pursuant to Section 5.5 and the hypothetical balance of such Partner’s Capital Account computed as if it had been maintained strictly in accordance with federal income tax accounting principles.

     “ Book-Up Event ” means an event that triggers a positive adjustment to the Capital Accounts of the Partners pursuant to Section 5.5(d).

     “ Business Day ” means Monday through Friday of each week, except that a legal holiday recognized as such by the government of the United States of America or the State of Texas shall not be regarded as a Business Day.

     “ Capital Account ” means the capital account maintained for a Partner pursuant to Section 5.5. The “ Capital Account ” of a Partner in respect of a General Partner Unit, a Common Unit, a Subordinated Unit, a Class B Unit, an Incentive Distribution Right or any other Partnership Interest shall be the amount that such Capital Account would be if such General Partner Unit, Common Unit, Subordinated Unit, Class B Unit, Incentive Distribution Right or other Partnership Interest were the only interest in the Partnership held by such Partner from and after the date on which such General Partner Unit, Common Unit, Class B Unit, Subordinated Unit, Incentive Distribution Right or other Partnership Interest was first issued.

     “ Capital Contribution ” means any cash, cash equivalents or the Net Agreed Value of Contributed Property that a Partner contributes to the Partnership.

     “ Capital Improvement ” means any (a) addition or improvement to the capital assets owned by any Group Member, (b) the acquisition of existing, or the construction of new or replacement of existing, capital assets or (c) capital contribution by a Group Member to a Person that is not a Subsidiary in which a Group Member has, or after such capital contribution will have, an equity interest to fund such Group Member’s pro rata share of the cost of the acquisition of existing, or the construction of new or replacement of existing, capital assets by such Person, in each case if and to the extent such addition, improvement, acquisition, construction or replacement is made to increase the long-term operating capacity or asset base of the Partnership Group, in the case of clauses (a) and (b), or such Person, in the case of clause (c), from the operating capacity or asset base of the Partnership Group or such Person, as the case may be, existing immediately prior to such addition, improvement, acquisition or construction; provided, however , that any such addition, improvement, replacement, acquisition or construction that is made solely for investment purposes shall not constitute a Capital Improvement under this

Agreement. For the avoidance of doubt, capital contributions by a Group Member to CIG, SNG or WYCO to fund such Group Member’s share of the cost of a capital improvement that is made to increase the long-term operating capacity or asset base shall constitute amounts contributed to fund a Capital Improvement for purposes of this Agreement.

     “ Capital Surplus ” has the meaning assigned to such term in Section 6.3(a).

     “ Carrying Value ” means (a) with respect to a Contributed Property, the Agreed Value of such property reduced (but not below zero) by all depreciation, amortization and cost recovery deductions charged to the Partners’ and Assignees’ Capital Accounts in respect of such Contributed Property, and (b) with respect to any other Partnership property, the adjusted basis of such property for federal income tax purposes, all as of the time of determination. The Carrying Value of any property shall be adjusted from time to time in accordance with Sections 5.5(d)(i) and 5.5(d)(ii) and to reflect changes, additions or other adjustments to the Carrying Value for dispositions and acquisitions of Partnership properties, as deemed appropriate by the General Partner.

     “ Cause ” means a court of competent jurisdiction has entered a final, non-appealable judgment finding the General Partner liable for actual fraud or willful misconduct in its capacity as a general partner of the Partnership.

     “ Certificate ” means (a) a certificate (i) substantially in the form of Exhibit A to this Agreement, (ii) issued in global form in accordance with the rules and regulations of the Depositary or (iii) in such other form as may be adopted by the General Partner, issued by the Partnership evidencing ownership of one or more Common Units or (b) a certificate, in such form as may be adopted by the General Partner, issued by the Partnership evidencing ownership of one or more other Partnership Securities.

     “ Certificate of Limited Partnership ” means the Certificate of Limited Partnership of the Partnership filed with the Secretary of State of the State of Delaware as referenced in Section 7.2, as such Certificate of Limited Partnership may be amended, supplemented or restated from time to time.

     “ CIG ” means Colorado Interstate Gas Company, a Delaware general partnership.

     “ Citizenship Certification ” means a properly completed certificate in such form as may be specified by the General Partner by which an Assignee or a Limited Partner certifies that he (and if he is a nominee holding for the account of another Person, that to the best of his knowledge such other Person) is an Eligible Citizen.

     “ claim ” (as used in Section 7.12(d)) has the meaning assigned to such term in Section 7.12(d).

     “ Class B Unit ” means a Partnership Security representing a fractional part of the Partnership Interests of all Limited Partners and Assignees, and having the rights and obligations specified with respect to Class B Units in this Agreement. A Class B Unit that is convertible into a Common Unit shall not constitute a Common Unit until such conversion occurs pursuant to the terms hereof.

     “ Closing Date ” means the first date on which Common Units are issued and sold by the Partnership to the Underwriters pursuant to the provisions of the Underwriting Agreement.

     “ Closing Price ” means, in respect of any class of Limited Partner Interests, as of the date of determination, the last sale price on such day, regular way, or in case no such sale takes place on such day, the average of the closing bid and asked prices on such day, regular way, as reported in the principal consolidated transaction reporting system with respect to securities listed on the principal National Securities Exchange (other than the Nasdaq Stock Market) on which the respective Limited Partner Interests are listed or admitted to trading or, if such Limited Partner Interests are not listed or admitted to trading on any National Securities Exchange (other than the Nasdaq Stock Market), the last quoted price on such day or, if not so quoted, the average of the high bid and low asked prices on such day in the over-the-counter market, as reported by the Nasdaq Stock Market or such other system then in use, or, if on any such day such Limited Partner Interests of such class are not quoted by any such organization, the average of the closing bid and asked prices on such day as furnished by a professional market maker making a market in such Limited Partner Interests of such class selected by the General Partner, or if on any such day no market maker is making a market in such Limited Partner Interests of such class, the fair value of such Limited Partner Interests on such day as determined by the General Partner.

     “ Code ” means the Internal Revenue Code of 1986, as amended and in effect from time to time. Any reference herein to a specific section or sections of the Code shall be deemed to include a reference to any corresponding provision of any successor law.

     “ Combined Interest ” has the meaning assigned to such term in Section 11.3(a).

     “ Commences Commercial Service ” and “ Commencement of Commercial Service ” shall mean the date a Capital Improvement is first put into or commences commercial service following completion of construction and testing.

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

     “ Commodity Hedge Contract ” means any commodity exchange, swap, forward, cap, floor, collar or other similar agreement or arrangement entered into for the purpose of hedging the Partnership Group’s exposure to fluctuations in the price of hydrocarbons or other commodities in their operations and not for speculative purposes.

     “ Common Unit ” means a Partnership Security representing a fractional part of the Partnership Interests of all Limited Partners and Assignees, and having the rights and obligations specified with respect to Common Units in this Agreement. The term “Common Unit” does not include a Subordinated Unit or Class B Unit prior to its conversion into a Common Unit pursuant to the terms hereof.

     “ Common Unit Arrearage ” means, with respect to any Common Unit, whenever issued, as to any Quarter within the Subordination Period, the excess, if any, of (a) the Minimum Quarterly Distribution with respect to a Common Unit in respect of such Quarter over (b) the sum of all Available Cash distributed with respect to a Common Unit in respect of such Quarter pursuant to Section 6.4(a)(i).

     “ Conflicts Committee ” means a committee of the Board of Directors of the General Partner composed of two or more directors, each of whom (a) is not a security holder, officer or employee of the General Partner, (b) is not an officer, director or employee of any Affiliate of the General Partner, (c) is not a holder of any ownership interest in the Partnership Group other than Common Units and awards that may be granted to such director under the Long Term Incentive Plan and (d) meets the independence standards required of directors who serve on an audit committee of a board of directors established by the Securities Exchange Act and the rules and regulations of the Commission thereunder and by the National Securities Exchange on which the Common Units are listed or admitted to trading.

     “ Contributed Property ” means each property or other asset, in such form as may be permitted by the Delaware Act, but excluding cash, contributed to the Partnership. Once the Carrying Value of a Contributed Property is adjusted pursuant to Section 5.5(d), such property shall no longer constitute a Contributed Property, but shall be deemed an Adjusted Property.

     “ Contribution Agreement ” means that certain Contribution and Conveyance Agreement, dated as of the Closing Date, among the General Partner, the Partnership, the Operating Company and certain other parties, together with the additional conveyance documents and instruments contemplated or referenced thereunder, as such may be amended, supplemented or restated from time to time.

     “ Converted Common Units ” has the meaning assigned to such term in Section 6.1(d)(x)(B).

     “ Credit Agreement ” means the Credit Agreement, dated as of November 21, 2007 among the Operating Company, WIC, the Partnership, Bank of America, N.A. and the other lenders party thereto.

     “ Cumulative Common Unit Arrearage ” means, with respect to any Common Unit, whenever issued, and as of the end of any Quarter, the excess, if any, of (a) the sum resulting from adding together the Common Unit Arrearage as to an Initial Common Unit for each of the Quarters within the Subordination Period ending on or before the last day of such Quarter over (b) the sum of any distributions theretofore made pursuant to Section 6.4(a)(ii) and the second sentence of Section 6.5 with respect to an Initial Common Unit (including any distributions to be made in respect of the last of such Quarters).

     “ Curative Allocation ” means any allocation of an item of income, gain, deduction, loss or credit pursuant to the provisions of Section 6.1(d)(xi).

     “ Current Market Price ” means, in respect of any class of Limited Partner Interests, as of the date of determination, the average of the daily Closing Prices per Limited Partner Interest of such class for the 20 consecutive Trading Days immediately prior to such date.

     “ Delaware Act ” means the Delaware Revised Uniform Limited Partnership Act, 6 Del C. Section 17-101, et seq., as amended, supplemented or restated from time to time, and any successor to such statute.

     “ Departing General Partner ” means a former general partner from and after the effective date of any withdrawal or removal of such former general partner pursuant to Section 11.1 or Section 11.2.

     “ Depositary ” means, with respect to any Units issued in global form, The Depository Trust Company and its successors and permitted assigns.

     “ Economic Risk of Loss ” has the meaning set forth in Treasury Regulation Section 1.752-2(a).

     “ Eligible Citizen ” means a Person qualified to own interests in real property in jurisdictions in which any Group Member does business or proposes to do business from time to time, and whose status as a Limited Partner or Assignee the General Partner determines does not or would not subject such Group Member to a significant risk of cancellation or forfeiture of any of its properties or any interest therein.

     “ Eligible Holder ” means a Person either (a) subject to United States federal income taxation on the public utility income generated by the Partnership or (b) not subject to United States federal taxation on the public utility income generated by the Partnership, but all of whose direct or indirect beneficial owners are subject to United States federal taxation on the public utility income generated by the Partnership. Schedule I to the Transfer Application provides examples of Persons that are and Persons that are not Eligible Holders.

     “ El Paso ” means El Paso Corporation, a Delaware corporation.

     “ Estimated Incremental Quarterly Tax Amount ” has the meaning assigned to such term in Section 6.9.

     “ Event of Withdrawal ” has the meaning assigned to such term in Section 11.1(a).

     “ Expansion Capital Expenditures ” means cash expenditures for Acquisitions or Capital Improvements, and shall not include Maintenance Capital Expenditures or Investment Capital Expenditures. Expansion Capital Expenditures shall include interest (and related fees) on debt incurred and distributions on equity issued, in each case, to finance the construction of a Capital Improvement and paid in respect of the period beginning on the date that the Group Member enters into a binding obligation to commence construction of a Capital Improvement and ending on the earlier to occur of the date that such Capital Improvement Commences Commercial Service and the date that such Capital Improvement is abandoned or disposed of. Debt incurred or equity issued to fund such construction period interest payments or such construction period distributions on equity paid during such period, shall also be deemed to be debt incurred or equity issued, as the case may be, to finance the construction of a Capital Improvement. Expansion Capital Expenditures will include cash contributed by a Group Member to an entity of which such Group Member is, or after such contribution will be, directly or indirectly, an equity owner to be used by such entity for expansion capital expenditures. For example, cash contributed by a Group Member to CIG, SNG or WYCO to fund expansion capital expenditures of CIG, SNG or WYCO shall constitute Expansion Capital Expenditures. Where capital expenditures are made in part for Expansion Capital Expenditures and in part for other purposes, the General Partner, with the concurrence of the Conflicts Committee, shall determine the

allocation of such expenditures between Expansion Capital Expenditures and expenditures made for other purposes.

     “ FERC ” means the Federal Energy Regulatory Commission, or successor to powers thereof.

     “ Final Subordinated Units ” has the meaning assigned to such term in Section 6.1(d)(x)(A).

     “ First Liquidation Target Amount ” has the meaning assigned to such term in Section 6.1(c)(i)(E).

     “ First Target Distribution ” means $0.33063 per Unit per Quarter (or, with respect to the period commencing on the Closing Date and ending on December 31, 2007, it means the product of $0.33063 multiplied by a fraction of which the numerator is the number of days in such period, and of which the denominator is 92), subject to adjustment in accordance with Sections 5.11, 6.6 and 6.9.

     “ Fully Diluted Basis ” means, when calculating the number of Outstanding Units for any period, a basis that includes, in addition to the Outstanding Units, all Partnership Securities and options, rights, warrants and appreciation rights relating to an equity interest in the Partnership (a) that are convertible into or exercisable or exchangeable for Units that are senior to or pari passu with the Subordinated Units, (b) whose conversion, exercise or exchange price is less than the Current Market Price on the date of such calculation, (c) that may be converted into or exercised or exchanged for such Units prior to or during the Quarter immediately following the end of the period for which the calculation is being made without the satisfaction of any contingency beyond the control of the holder other than the payment of consideration and the compliance with administrative mechanics applicable to such conversion, exercise or exchange and (d) that were not converted into or exercised or exchanged for such Units during the period for which the calculation is being made; provided, however , that for purposes of determining the number of Outstanding Units on a Fully Diluted Basis when calculating whether the Subordination Period has ended or Subordinated Units are entitled to convert into Common Units pursuant to Section 5.7, such Partnership Securities, options, rights, warrants and appreciation rights shall be deemed to have been Outstanding Units only for the four Quarters that comprise the last four Quarters of the measurement period; provided , further , that if consideration will be paid to any Group Member in connection with such conversion, exercise or exchange, the number of Units to be included in such calculation shall be that number equal to the difference between (i) the number of Units issuable upon such conversion, exercise or exchange and (ii) the number of Units that such consideration would purchase at the Current Market Price.

     “ General Partner ” means El Paso Pipeline GP Company, L.L.C., a Delaware limited liability company, and its successors and permitted assigns that are admitted to the Partnership as general partner of the Partnership, in its capacity as general partner of the Partnership (except as the context otherwise requires).

     “ General Partner Interest ” means the ownership interest of the General Partner in the Partnership (in its capacity as a general partner without reference to any Limited Partner Interest held by it), which is evidenced by General Partner Units, and includes any and all benefits to which the General Partner is entitled as provided in this Agreement, together with all obligations of the General Partner to comply with the terms and provisions of this Agreement.

     “ General Partner Unit ” means a fractional part of the General Partner Interest having the rights and obligations specified with respect to the General Partner Interest. A General Partner Unit is not a Unit.

     “ Group ” means a Person that with or through any of its Affiliates or Associates has any contract, arrangement, understanding or relationship for the purpose of acquiring, holding, voting (except voting pursuant to a revocable proxy or consent given to such Person in response to a proxy or consent solicitation made to 10 or more Persons), exercising investment power or disposing of any Partnership Interests with any other Person that beneficially owns, or whose Affiliates or Associates beneficially own, directly or indirectly, Partnership Interests.

     “ Group Member ” means a member of the Partnership Group.

     “ Group Member Agreement ” means the partnership agreement of any Group Member, other than the Partnership, that is a limited or general partnership, the limited liability company agreement of any Group Member that is a limited liability company, the certificate of incorporation and bylaws or similar organizational documents of any Group Member that is a corporation, the joint venture agreement or similar governing document of any Group Member that is a joint venture and the governing or organizational or similar documents of any other Group Member that is a Person other than a limited or general partnership, limited liability company, corporation or joint venture, as such may be amended, supplemented or restated from time to time.

     “ Holder ” as used in Section 7.12, has the meaning assigned to such term in Section 7.12(a).

     “ Holdings ” means El Paso Pipeline LP Holdings, L.L.C., a Delaware limited liability company.

     “ IDR Reset Election ” has the meaning assigned to such term in Section 5.11(a).

     “ Incentive Distribution Right ” means a non-voting Limited Partner Interest issued to the General Partner, which Limited Partner Interest will confer upon the holder thereof only the rights and obligations specifically provided in this Agreement with respect to Incentive Distribution Rights (and no other rights otherwise available to or other obligations of a holder of a Partnership Interest). Notwithstanding anything in this Agreement to the contrary, the holder of an Incentive Distribution Right shall not be entitled to vote such Incentive Distribution Right on any Partnership matter except as may otherwise be required by law.

     “ Incentive Distributions ” means any amount of cash distributed to the holders of the Incentive Distribution Rights pursuant to Sections 6.4(a)(v), (vi) and (vii) and 6.4(b)(iii), (iv) and (v).

     “ Incremental Income Taxes ” has the meaning assigned to such term in Section 6.9.

     “ Indemnified Persons ” has the meaning assigned to such term in Section 7.12(d).

     “ Indemnitee ” means (a) the General Partner, (b) any Departing General Partner, (c) any Person who is or was an Affiliate of the General Partner or any Departing General Partner, (d) any Person who is or was a member, manager, partner, director, officer, fiduciary or trustee of any Group Member (other than any Person who is or was a Limited Partner of the Partnership in such Person’s capacity as such), the General Partner or any Departing General Partner or any Affiliate of any Group Member, the General Partner or any Departing General Partner, (e) any Person who is or was serving at the request of the General Partner or any Departing General Partner or any Affiliate of the General Partner or any Departing General Partner as an officer, director, member, manager, partner, fiduciary or trustee of another Person; provided that a Person shall not be an Indemnitee by reason of providing, on a fee-for-services basis, trustee, fiduciary or custodial services, and (f) any Person the General Partner designates as an “Indemnitee” for purposes of this Agreement.

     “ Ineligible Holder ” means a Person whom the General Partner has determined is not an Eligible Holder.

     “ Initial Common Units ” means the Common Units sold in the Initial Offering.

     “ Initial Limited Partners ” means the Organizational Limited Partner, Holdings and the General Partner (with respect to the Common Units, Subordinated Units and Incentive Distribution Rights received by them pursuant to Section 5.2) and the Underwriters, in each case upon being admitted to the Partnership in accordance with Section 10.1.

     “ Initial Offering ” means the initial offering and sale of Common Units to the public, as described in the Registration Statement.

     “ Initial Unit Price ” means (a) with respect to the Common Units and the Subordinated Units, the initial public offering price per Common Unit at which the Underwriters offered the Common Units to the public for sale as set forth on the cover page of the prospectus included as part of the Registration Statement and first issued at or after the time the Registration Statement first became effective or (b) with respect to any other class or series of Units, the price per Unit at which such class or series of Units is initially sold by the Partnership, as determined by the General Partner, in each case adjusted as the General Partner determines to be appropriate to give effect to any distribution, subdivision or combination of Units.

     “ Interest Rate Hedge Contract ” means any interest rate exchange, swap, forward, cap, floor collar or other similar agreement or arrangement entered into for the purpose of reducing the exposure of the Partnership Group to fluctuations in interest rates in their financing activities and not for speculative purposes.

     “ Interim Capital Transactions ” means the following transactions if they occur prior to the Liquidation Date: (a) borrowings, refinancings or refundings of indebtedness (other than Working Capital Borrowings and other than for items purchased on open account in the ordinary course of business) by any Group Member and sales of debt securities of any Group Member;

(b) sales of equity interests of any Group Member (including the Common Units sold to the Underwriters pursuant to the exercise of the Over-Allotment Option); (c) sales or other voluntary or involuntary dispositions of any assets of any Group Member other than (i) sales or other dispositions of inventory, accounts receivable and other assets in the ordinary course of business, and (ii) sales or other dispositions of assets as part of normal asset retirements or replacements; (d) the termination of Commodity Hedge Contracts or Interest Rate Hedge Contracts prior to the respective specified termination dates; (e) capital contributions received by a Group Member or, in the case of capital contributions received by a Person that is not a Subsidiary of the Partnership (such as CIG, SNG or WYCO), capital contributions received from the owner(s) or members of such Person that is not a Group Member; or (f) corporate reorganizations or restructurings.

     “ Investment Capital Expenditures ” means capital expenditures other than Maintenance Capital Expenditures and Expansion Capital Expenditures. Investment Capital Expenditures will include cash contributed by a Group Member to an entity of which such Group Member is, or after such contribution will be directly or indirectly, an equity owner to be used by such entity for Investment Capital Expenditures, for example, cash contributed by a Group Member to CIG, SNG or WYCO to fund Investment Capital Expenditures of CIG, SNG or WYCO shall constitute Investment Capital Expenditures.

     “ Issue Price ” means the price at which a Unit is purchased from the Partnership, net of any sales commission or underwriting discount charged to the Partnership.

     “ Limited Partner ” means, unless the context otherwise requires, (a) the Organizational Limited Partner prior to its withdrawal from the Partnership, each Initial Limited Partner, each Substituted Limited Partner, each Additional Limited Partner and any Departing General Partner upon the change of its status from General Partner to Limited Partner pursuant to Section 11.3, in each case, in such Person’s capacity as (a) limited partner of the Partnership or (b) solely for purposes of Articles V, VI, VII, IX and XII, each Assignee; provided, however , that when the term “Limited Partner” is used herein in the context of any vote or other approval, including Articles XIII and XIV, such term shall not, solely for such purpose, include any holder of an Incentive Distribution Right (solely with respect to its Incentive Distribution Rights and not with respect to any other Limited Partner Interest held by such Person) except as may be required by law.

     “ Limited Partner Interest ” means the ownership interest of a Limited Partner or Assignee in the Partnership, which may be evidenced by Common Units, Class B Units, Subordinated Units, Incentive Distribution Rights or other Partnership Securities or a combination thereof or interest therein, and includes any and all benefits to which such Limited Partner or Assignee is entitled as provided in this Agreement, together with all obligations of such Limited Partner or Assignee to comply with the terms and provisions of this Agreement; provided, however , that when the term “Limited Partner Interest” is used herein in the context of any vote or other approval, including Articles XIII and XIV, such term shall not, solely for such purpose, include any Incentive Distribution Right except as may be required by law.

     “ Limited Partner Unit ” means each of the Common Units, Class B Units, Subordinated Units and other Units representing fractional parts of the Partnership Interests of all Limited Partners and Assignees.

     “ Liquidation Date ” means (a) in the case of an event giving rise to the dissolution of the Partnership of the type described in clauses (a) and (b) of the first sentence of Section 12.2, the date on which the applicable time period during which the holders of Outstanding Units have the right to elect to continue the business of the Partnership has expired without such an election being made, and (b) in the case of any other event giving rise to the dissolution of the Partnership, the date on which such event occurs.

     “ Liquidator ” means one or more Persons selected by the General Partner to perform the functions described in Section 12.4 as liquidating trustee of the Partnership within the meaning of the Delaware Act.

     “ Long Term Incentive Plan ” means the El Paso Pipeline GP Company, L.L.C. Long-Term Incentive Plan, as may be amended, or any equity compensation plan successor thereto.

     “ Maintenance Capital Expenditures ” means cash expenditures (including expenditures for the addition or improvement to or the replacement of the capital assets owned by any Group Member or for the acquisition of existing, or the construction or development of new, capital assets) if such expenditures are made to maintain, including over the long term, the operating capacity or asset base of the Partnership Group. Maintenance Capital Expenditures shall not include (a) Expansion Capital Expenditures or (b) Investment Capital Expenditures. Maintenance Capital Expenditures will include cash contributed by any Group Member to an entity of which such Group Member is, or after such contribution will be, directly or indirectly, an equity owner to be used by such entity for maintenance capital expenditures. For example, cash contributed by a Group Member to CIG, SNG or WYCO to fund maintenance capital expenditures of CIG, SNG or WYCO shall constitute Maintenance Capital Expenditures.

     “ Merger Agreement ” has the meaning assigned to such term in Section 14.1.

     “ Minimum Quarterly Distribution ” means $0.2875 per Unit per Quarter (or with respect to the period commencing on the Closing Date and ending on December 31, 2007, it means the product of $0.2875 multiplied by a fraction of which the numerator is the number of days in such period and of which the denominator is 92), subject to adjustment in accordance with Sections 5.11, 6.6 and 6.9.

     “ National Securities Exchange ” means an exchange registered with the Commission under Section 6(a) of the Securities Exchange Act and any successor to such statute.

     “ Net Agreed Value ” means, (a) in the case of any Contributed Property, the Agreed Value of such property reduced by any liabilities either assumed by the Partnership upon such contribution or to which such property is subject when contributed, and (b) in the case of any property distributed to a Partner or Assignee by the Partnership, the Partnership’s Carrying Value of such property (as adjusted pursuant to Section 5.5(d)(ii)) at the time such property is distributed, reduced by any indebtedness either assumed by such Partner or Assignee upon such distribution or to which such property is subject at the time of distribution, in either case, as

determined under Section 752 of the Code, and (c) in the case of a contribution of Common Units by the General Partner to the Partnership as a Capital Contribution pursuant to Section 5.2(b), an amount per Common Unit contributed equal to the Current Market Price per Common Unit as of the date of the contribution.

     “ Net Income ” means, for any taxable year, the excess, if any, of the Partnership’s items of income and gain (other than those items taken into account in the computation of Net Termination Gain or Net Termination Loss) for such taxable year over the Partnership’s items of loss and deduction (other than those items taken into account in the computation of Net Termination Gain or Net Termination Loss) for such taxable year. The items included in the calculation of Net Income shall be determined in accordance with Section 5.5(b) and shall not include any items specially allocated under Section 6.1(d); provided , that the determination of the items that have been specially allocated under Section 6.1(d) shall be made as if Section 6.1(d)(xii) were not in this Agreement.

     “ Net Loss ” means, for any taxable year, the excess, if any, of the Partnership’s items of loss and deduction (other than those items taken into account in the computation of Net Termination Gain or Net Termination Loss) for such taxable year over the Partnership’s items of income and gain (other than those items taken into account in the computation of Net Termination Gain or Net Termination Loss) for such taxable year. The items included in the calculation of Net Loss shall be determined in accordance with Section 5.5(b) and shall not include any items specially allocated under Section 6.1(d); provided , that the determination of the items that have been specially allocated under Section 6.1(d) shall be made as if Section 6.1(d)(xii) were not in this Agreement.

     “ Net Positive Adjustments ” means, with respect to any Partner, the excess, if any, of the total positive adjustments over the total negative adjustments made to the Capital Account of such Partner pursuant to Book-Up Events and Book-Down Events.

     “ Net Termination Gain ” means, for any taxable year, the sum, if positive, of all items of income, gain, loss or deduction recognized by the Partnership after the Liquidation Date. The items included in the determination of Net Termination Gain shall be determined in accordance with Section 5.5(b) and shall not include any items of income, gain or loss specially allocated under Section 6.1(d).

     “ Net Termination Loss ” means, for any taxable year, the sum, if negative, of all items of income, gain, loss or deduction recognized by the Partnership after the Liquidation Date. The items included in the determination of Net Termination Loss shall be determined in accordance with Section 5.5(b) and shall not include any items of income, gain or loss specially allocated under Section 6.1(d).

     “ Non-citizen Assignee ” means a Person whom the General Partner has determined does not constitute an Eligible Citizen and as to whose Partnership Interest the General Partner has become the Substituted Limited Partner, pursuant to Section 4.9.

     “ Nonrecourse Built-in Gain ” means with respect to any Contributed Properties or Adjusted Properties that are subject to a mortgage or pledge securing a Nonrecourse Liability,

the amount of any taxable gain that would be allocated to the Partners pursuant to Sections 6.2(b)(i)(A), 6.2(b)(ii)(A) and 6.2(b)(iii) if such properties were disposed of in a taxable transaction in full satisfaction of such liabilities and for no other consideration.

     “ Nonrecourse Deductions ” means any and all items of loss, deduction or expenditure (including any expenditure described in Section 705(a)(2)(B) of the Code) that, in accordance with the principles of Treasury Regulation Section 1.704-2(b), are attributable to a Nonrecourse Liability.

     “ Nonrecourse Liability ” has the meaning set forth in Treasury Regulation Section 1.752-1(a)(2).

     “ Notice of Election to Purchase ” has the meaning assigned to such term in Section 15.1(b).

     “ Omnibus Agreement ” means that certain Omnibus Agreement, dated as of the Closing Date, among El Paso, Southern Natural Gas Company, Colorado Interstate Gas Company, the General Partner and the Partnership, as such agreement may be amended, supplemented or restated from time to time.

     “ Operating Company ” means El Paso Pipeline Partners Operating Company, L.L.C., a Delaware limited liability company, and any successors thereto.

     “ Operating Expenditures ” means all Partnership Group cash expenditures (or the Partnership’s proportionate share of expenditures in the case of Subsidiaries that are not wholly owned), including, but not limited to, taxes, reimbursements of the General Partner, interest payments, payments made in the ordinary course of business under Interest Rate Hedge Contracts and Commodity Hedge Contracts ( provided that payments made in connection with the termination of any Interest Rate Hedge Contract or Commodity Hedge Contract prior to the expiration of its stipulated settlement or termination date shall be included in Operating Expenditures in equal quarterly installments over the remaining scheduled life of such Interest Rate Hedge Contract or Commodity Hedge Contract), Maintenance Capital Expenditures, director and officer compensation, repayment of Working Capital Borrowings and non-Pro Rata repurchases of Units (other than those made with the proceeds of an Interim Capital Transaction), subject to the following:

     (a) deemed repayments of Working Capital Borrowings deducted from Operating Surplus pursuant to clause (b)(iii) of the definition of “Operating Surplus” shall not constitute Operating Expenditures when actually repaid;

     (b) payments (including prepayments and prepayment penalties) of principal of and premium on indebtedness other than Working Capital Borrowings shall not constitute Operating Expenditures when actually repaid;

     (c) Operating Expenditures shall not include (i) Expansion Capital Expenditures, (ii) Investment Capital Expenditures, (iii) payment of transaction expenses (including taxes) relating to Interim Capital Transactions, (iii) distributions to Partners or (iv) non-Pro Rata

purchases of the Units of any class made with the proceeds of an Interim Capital Transaction; and

     (d) Where capital expenditures are made in part for Maintenance Capital Expenditures and in part for other purposes, the General Partner, with the concurrence of the Conflicts Committee, shall determine the allocation of such capital expenditures between Maintenance Capital Expenditures and capital expenditures made for other purposes and, with respect to the part of such capital expenditures consisting of Maintenance Capital Expenditures, the period over which Maintenance Capital Expenditures will be deducted as an Operating Expenditure in calculating Operating Surplus.

     “ Operating Surplus ” means, with respect to any period ending prior to the Liquidation Date, on a cumulative basis and without duplication,

     (a) the sum of (i) $50 million; (ii) all cash receipts of the Partnership Group (or the Partnership’s proportionate share of cash receipts in the case of Subsidiaries that are not wholly owned) for the period beginning on the Closing Date and ending on the last day of such period, but excluding cash receipts from Interim Capital Transactions (except to the extent specified in Section 6.5 and provided that cash receipts from the termination of a Commodity Hedge Contract or an Interest Rate Hedge Contract prior to its specified termination date shall be included in Operating Surplus in equal quarterly installments over the remaining scheduled life of such Commodity Hedge Contract or Interest Rate Hedge Contract) and excluding cash receipts to the extent specified in the parenthetical of clause (a)(iii) below; (iii) all cash receipts of the Partnership Group after the end of such period but on or before the date of determination constituting cash distributions received on the Partnership Group’s ownership interests in CIG, SNG and any other Person in which the Partnership Group owns similarly structured ownership interests (excluding any such receipts to the extent constituting either (A) cash proceeds from the retirement of the notes receivable outstanding as of the Closing Date under the cash management agreement between El Paso and CIG, SNG or such other Person or (B) the proceeds of a transaction that would constitute an Interim Capital Transaction if the Partnership had engaged in such transaction instead of CIG, SNG or such other Person); provided , however , that at such time as CIG, SNG or such other Person constitutes a Subsidiary and a member of the Partnership Group, this clause (a)(iii) shall cease to apply to cash distributions from CIG, SNG or such Other Person, as the case may be; (iv) all cash receipts of the Partnership Group (or the Partnership’s proportionate share of cash receipts in the case of Subsidiaries that are not wholly owned) after the end of such period but on or before the date of determination of Operating Surplus with respect to such period resulting from Working Capital Borrowings; and (v) cash distributions paid on equity issued to finance all or a portion of the construction, acquisition, development or improvement of a Capital Improvement or replacement of a capital asset (such as equipment or facilities) in respect of the period beginning on the date that the Group Member enters into a binding obligation to commence the construction, acquisition, development or improvement of a Capital Improvement or replacement of a capital asset and ending on the earlier to occur of the date the Capital Improvement or capital asset Commences Commercial Service or the date that it is abandoned or disposed of (equity issued to fund construction, acquisition, development or improvement period interest payments on debt incurred, or construction, acquisition, development or improvement period distributions on equity issued, to finance the construction, acquisition or development of a Capital Improvement or replacement of a capital asset shall also

be deemed to be equity issued to finance the construction, acquisition or development of a Capital Improvement or replacement of a capital asset for purposes of this clause (v)); less

     (b) the sum of (i) Operating Expenditures for the period beginning on the Closing Date and ending on the last day of such period; (ii) the amount of cash reserves (or the Partnership’s proportionate share of cash reserves in the case of Subsidiaries that are not wholly owned) established by the General Partner to provide funds for future Operating Expenditures; and (iii) all Working Capital Borrowings not repaid within twelve months after having been incurred;

provided, however , that disbursements made (including contributions to a Group Member or disbursements on behalf of a Group Member) or cash reserves established, increased or reduced after the end of such period but on or before the date of determination of Available Cash with respect to such period shall be deemed to have been made, established, increased or reduced, for purposes of determining Operating Surplus, within such period if the General Partner so determines.

     Notwithstanding the foregoing, “Operating Surplus” with respect to the Quarter in which the Liquidation Date occurs and any subsequent Quarter shall equal zero.

     “ Opinion of Counsel ” means a written opinion of counsel (who may be regular counsel to the Partnership or the General Partner or any of its Affiliates) acceptable to the General Partner.

     “ Option Closing Date ” means the date or dates on which any Common Units are sold by the Partnership to the Underwriters upon exercise of the Over-Allotment Option.

     “ Organizational Limited Partner ” means Holdings in its capacity as the organizational limited partner of the Partnership pursuant to this Agreement.

     “ Outstanding ” means, with respect to Partnership Securities, all Partnership Securities that are issued by the Partnership and reflected as outstanding on the Partnership’s books and records as of the date of determination; provided, however , that if at any time any Person or Group (other than the General Partner or its Affiliates) beneficially owns 20% or more of the Outstanding Partnership Securities of any class then Outstanding, all Partnership Securities owned by such Person or Group shall not be voted on any matter and shall not be considered to be Outstanding when sending notices of a meeting of Limited Partners to vote on any matter (unless otherwise required by law), calculating required votes, determining the presence of a quorum or for other similar purposes under this Agreement, except that Units so owned shall be considered to be Outstanding for purposes of Section 11.1(b)(iv) (such Units shall not, however, be treated as a separate class of Partnership Securities for purposes of this Agreement or the Delaware Act); provided , further , that the foregoing limitation shall not apply to (i) any Person or Group who acquired 20% or more of the Outstanding Partnership Securities of any class then Outstanding directly from the General Partner or its Affiliates, (ii) any Person or Group who acquired 20% or more of the Outstanding Partnership Securities of any class then Outstanding directly or indirectly from a Person or Group described in clause (i) provided that the General Partner shall have notified such Person or Group in writing that such limitation shall not apply,

or (iii) any Person or Group who acquired 20% or more of any Partnership Securities issued by the Partnership with the prior approval of the Board of Directors of the General Partner.

     “ Over-Allotment Option ” means the option granted to the Underwriters by the Partnership pursuant to the Underwriting Agreement.

     “ Partner Nonrecourse Debt ” has the meaning set forth in Treasury Regulation Section 1.704-2(b)(4).

     “ Partner Nonrecourse Debt Minimum Gain ” has the meaning set forth in Treasury Regulation Section 1.704-2(i)(2).

     “ Partner Nonrecourse Deductions ” means any and all items of loss, deduction or expenditure (including any expenditure described in Section 705(a)(2)(B) of the Code) that, in accordance with the principles of Treasury Regulation Section 1.704-2(i), are attributable to a Partner Nonrecourse Debt.

     “ Partners ” means the General Partner and the Limited Partners.

     “ Partnership ” means El Paso Pipeline Partners, L.P., a Delaware limited partnership.

     “ Partnership Group ” means the Partnership and its Subsidiaries treated as a single consolidated entity.

     “ Partnership Interest ” means an interest in the Partnership, which shall include the General Partner Interest and Limited Partner Interests.

     “ Partnership Minimum Gain ” means that amount determined in accordance with the principles of Treasury Regulation Section 1.704-2(d).

     “ Partnership Security ” means any class or series of equity interest in the Partnership (but excluding any options, rights, warrants and appreciation rights relating to an equity interest in the Partnership), including Common Units, Class B Units, Subordinated Units, General Partner Units and Incentive Distribution Rights.

     “ Per Unit Capital Amount ” means, as of any date of determination, the Capital Account, stated on a per Unit basis, underlying any Unit held by a Person other than the General Partner or any Affiliate of the General Partner who holds Units.

     “ Percentage Interest ” means as of any date of determination (a) as to the General Partner with respect to General Partner Units and as to any Unitholder or Assignee with respect to Units, the product obtained by multiplying (i) 100% less the percentage applicable to clause (b) below by (ii) the quotient obtained by dividing (A) the number of General Partner Units held by the General Partner or the number of Units held by such Unitholder or Assignee, as the case may be, by (B) the total number of all Outstanding Units and General Partner Units, and (b) as to the holders of other Partnership Securities issued by the Partnership in accordance with Section 5.6, the percentage established as a part of such issuance. The Percentage Interest with respect to an Incentive Distribution Right shall at all times be zero.

     “ Person ” means an individual, a corporation, firm, limited liability company, partnership, joint venture, trust, unincorporated organization, association, government agency or political subdivision thereof or other entity.

     “ Plan of Conversion ” has the meaning assigned to such term in Section 14.1.

     “ Pro Rata ” means (a) when used with respect to Units or any class thereof, apportioned among all designated Units in accordance with their relative Percentage Interests, (b) when used with respect to Partners, Assignees and/or Record Holders, apportioned among all Partners, Assignees and/or Record Holders in accordance with their relative Percentage Interests and (c) when used with respect to holders of Incentive Distribution Rights, apportioned among all holders of Incentive Distribution Rights in accordance with the relative number or percentage of Incentive Distribution Rights held by each such holder.

     “ Purchase Date ” means the date determined by the General Partner as the date for purchase of all Outstanding Limited Partner Interests of a certain class (other than Limited Partner Interests owned by the General Partner and its Affiliates) pursuant to Article XV.

     “ Quarter ” means, unless the context requires otherwise, a fiscal quarter of the Partnership, or, with respect to the fiscal quarter of the Partnership which includes the Closing Date, the portion of such fiscal quarter after the Closing Date.

     “ Recapture Income ” means any gain recognized by the Partnership (computed without regard to any adjustment required by Section 734 or Section 743 of the Code) upon the disposition of any property or asset of the Partnership, which gain is characterized as ordinary income because it represents the recapture of deductions previously taken with respect to such property or asset.

     “ Record Date ” means the date established by the General Partner or otherwise in accordance with this Agreement for determining (a) the identity of the Record Holders entitled to notice of, or to vote at, any meeting of Limited Partners or entitled to vote by ballot or give approval of Partnership action in writing without a meeting or entitled to exercise rights in respect of any lawful action of Limited Partners or (b) the identity of Record Holders entitled to receive any report or distribution or to participate in any offer.

     “ Record Holder ” means the Person in whose name a Common Unit is registered on the books of the Transfer Agent as of the opening of business on a particular Business Day, or with respect to other Partnership Interests, the Person in whose name any such other Partnership Interest is registered on the books that the General Partner has caused to be kept as of the opening of business on such Business Day.

     “ Redeemable Interests ” means any Partnership Interests for which a redemption notice has been given, and has not been withdrawn, pursuant to Section 4.10.

     “ Registration Statement ” means the Registration Statement on Form S-1 (File No. 333-145835) as it has been or as it may be amended or supplemented from time to time, filed by the Partnership with the Commission under the Securities Act to register the offering and sale of the Common Units in the Initial Offering.

     “ Remaining Net Positive Adjustments ” means as of the end of any taxable period, (i) with respect to the Unitholders holding Common Units, Class B Units or Subordinated Units, the excess of (a) the Net Positive Adjustments of the Unitholders holding Common Units, Class B Units or Subordinated Units as of the end of such period over (b) the sum of those Partners’ Share of Additional Book Basis Derivative Items for each prior taxable period, (ii) with respect to the General Partner (as holder of the General Partner Units), the excess of (a) the Net Positive Adjustments of the General Partner as of the end of such period over (b) the sum of the General Partner’s Share of Additional Book Basis Derivative Items with respect to the General Partner Units for each prior taxable period, and (iii) with respect to the holders of Incentive Distribution Rights, the excess of (a) the Net Positive Adjustments of the holders of Incentive Distribution Rights as of the end of such period over (b) the sum of the Share of Additional Book Basis Derivative Items of the holders of the Incentive Distribution Rights for each prior taxable period.

     “ Required Allocations ” means (a) any limitation imposed on any allocation of Net Losses or Net Termination Losses under Section 6.1(b) or Section 6.1(c)(ii) and (b) any allocation of an item of income, gain, loss or deduction pursuant to Section 6.1(d)(i), Section 6.1(d)(ii), Section 6.1(d)(iv), Section 6.1(d)(vii) or Section 6.1(d)(ix).

     “ Reset MQD ” has the meaning assigned to such term in Section 5.11(e).

     “ Reset Notice ” has the meaning assigned to such term in Section 5.11(b).

     “ Residual Gain ” or “ Residual Loss ” means any item of gain or loss, as the case may be, of the Partnership recognized for federal income tax purposes resulting from a sale, exchange or other disposition of a Contributed Property or Adjusted Property, to the extent such item of gain or loss is not allocated pursuant to Section 6.2(b)(i)(A) or Section 6.2(b)(ii)(A), respectively, to eliminate Book-Tax Disparities.

     “ Retained Converted Subordinated Unit ” has the meaning assigned to such term in Section 5.5(c)(ii).

     “ Second Liquidation Target Amount ” has the meaning assigned to such term in Section 6.1(c)(i)(F).

     “ Second Target Distribution ” means $0.35938 per Unit per Quarter (or, with respect to the period commencing on the Closing Date and ending on December 31, 2007, it means the product of $0.35938 multiplied by a fraction of which the numerator is equal to the number of days in such period and of which the denominator is 92), subject to adjustment in accordance with Sections 5.11, 6.6 and 6.9.

     “ Securities Act ” means the Securities Act of 1933, as amended, supplemented or restated from time to time and any successor to such statute.

     “ Securities Exchange Act ” means the Securities Exchange Act of 1934, as amended, supplemented or restated from time to time and any successor to such statute.

     “ Share of Additional Book Basis Derivative Items ” means in connection with any allocation of Additional Book Basis Derivative Items for any taxable period, (i) with respect to

the Unitholders holding Common Units, Class B Units or Subordinated Units, the amount that bears the same ratio to such Additional Book Basis Derivative Items as the Unitholders’ Remaining Net Positive Adjustments as of the end of such period bears to the Aggregate Remaining Net Positive Adjustments as of that time, (ii) with respect to the General Partner (as holder of the General Partner Units), the amount that bears the same ratio to such Additional Book Basis Derivative Items as the General Partner’s Remaining Net Positive Adjustments as of the end of such period bears to the Aggregate Remaining Net Positive Adjustment as of that time, and (iii) with respect to the Partners holding Incentive Distribution Rights, the amount that bears the same ratio to such Additional Book Basis Derivative Items as the Remaining Net Positive Adjustments of the Partners holding the Incentive Distribution Rights as of the end of such period bears to the Aggregate Remaining Net Positive Adjustments as of that time.

     “ SNG ” means Southern Natural Gas Company, a Delaware general partnership.

     “ Special Approval ” means approval by a majority of the members of the Conflicts Committee acting in good faith.

     “ Subordinated Unit ” means a Partnership Security representing a fractional part of the Partnership Interests of all Limited Partners and Assignees and having the rights and obligations specified with respect to Subordinated Units in this Agreement. The term “Subordinated Unit” does not include a Common Unit or a Class B Unit. A Subordinated Unit that is convertible into a Common Unit shall not constitute a Common Unit until such conversion occurs.

     “ Subordination Period ” means the period commencing on the Closing Date and ending on the first to occur of the following dates:

     (a) the first Business Day of any Quarter beginning after December 31, 2010 in respect of which (i)(A) distributions of Available Cash from Operating Surplus on all of the Outstanding Common Units, Subordinated Units, or any Outstanding Units that are senior or equal in right of distribution to the Subordinated Units, and the General Partner Units with respect to each of the three consecutive, non-overlapping four-Quarter periods immediately preceding such date equaled or exceeded the sum of the Minimum Quarterly Distribution on all Outstanding Common Units and Subordinated Units and any other Outstanding Units that are senior or equal in right of distribution to the Subordinated Units and the General Partner Units during such periods and (B) the Adjusted Operating Surplus for each of the three consecutive, non-overlapping four-Quarter periods immediately preceding such date equaled or exceeded the sum of the Minimum Quarterly Distribution on all of the Common Units, Subordinated Units and any other Units that are senior or equal in right of distribution to the Subordinated Units and General Partner Units that were Outstanding during such periods on a Fully Diluted Basis, and (ii) there are no Cumulative Common Unit Arrearages;

     (b) the first Business Day of any Quarter beginning after December 31, 2008 in respect of which (i)(A) distributions of Available Cash from Operating Surplus on all of the Outstanding Common Units, Subordinated Units, any other Outstanding Units that are senior or equal in right of distribution to the Subordinated Units, and the General Partner Units with respect to each of the four consecutive non-overlapping Quarters immediately preceding such date equaled or exceeded 150% of the sum of the Minimum Quarterly Distribution on all of the

Outstanding Common Units and Subordinated Units and any other Outstanding Units that are senior or equal in right of distribution to the Subordinated Units and the General Partner Units during such periods, and (B) the Adjusted Operating Surplus for each of the four consecutive non-overlapping Quarters immediately preceding such date equaled or exceeded 150% of the sum of the Minimum Quarterly Distribution on the Common Units, Subordinated Units, other Units that are senior or equal in right of distribution to the Subordinated Units and General Partner Units that were Outstanding during such periods on a Fully Diluted Basis and (ii) there are no Cumulative Common Units Arrearages;

     (c) the first date on which there are no longer outstanding any Subordinated Units due to the conversion of Subordinated Units into Common Units pursuant to Section 5.7 or otherwise; and

     (d) the date on which the General Partner is removed as general partner of the Partnership upon the requisite vote by holders of Outstanding Units under circumstances where Cause does not exist and Units held by the General Partner and its Affiliates are not voted in favor of such removal.

     “ Subsidiary ” means, with respect to any Person, (a) a corporation of which more than 50% of the voting power of shares entitled (without regard to the occurrence of any contingency) to vote in the election of directors or other governing body of such corporation is owned, directly or indirectly, at the date of determination, by such Person, by one or more Subsidiaries of such Person or a combination thereof, (b) a partnership (whether general or limited) in which such Person or a Subsidiary of such Person is, at the date of determination, a general or limited partner of such partnership, but only if more than 50% of the partnership interests of such partnership (considering all of the partnership interests of the partnership as a single class) is owned, directly or indirectly, at the date of determination, by such Person, by one or more Subsidiaries of such Person, or a combination thereof, or (c) any other Person (other than a corporation or a partnership) in which such Person, one or more Subsidiaries of such Person, or a combination thereof, directly or indirectly, at the date of determination, has (i) at least a majority ownership interest or (ii) the power to elect or direct the election of a majority of the directors or other governing body of such Person.

     “ Substituted Limited Partner ” means a Person who is admitted as a Limited Partner to the Partnership pursuant to Section 10.2 in place of and with all the rights of a Limited Partner and who is shown as a Limited Partner on the books and records of the Partnership.

     “ Surviving Business Entity ” has the meaning assigned to such term in Section 14.2(b).

     “ Target Distributions ” means, collectively, the First Target Distribution, Second Target Distribution and Third Target Distribution.

     “ Taxation Certification ” means a properly completed certificate in such form or forms as may be specified by the General Partner by which a Limited Partner or Assignee certifies that he (and if he is a nominee holding for the account of another Person, that to the best of his knowledge such other Person) is an Eligible Holder and includes a Transfer Application containing such a certification.

     “ Third Liquidation Target Amount ” has the meaning assigned to such term in Section 6.1(c)(i)(G).

     “ Third Target Distribution ” means $0.43125 per Unit per Quarter (or, with respect to the period commencing on the Closing Date and ending on December 31, 2007, it means the product of $0.43125 multiplied by a fraction of which the numerator is equal to the number of days in such period and of which the denominator is 92), subject to adjustment in accordance with Sections 5.11, 6.6 and 6.9.

     “ Trading Day ” means, for the purpose of determining the Current Market Price of any class of Limited Partner Interests, a day on which the principal National Securities Exchange on which such Limited Partner Interests are listed is open for the transaction of business or, if Limited Partner Interests of a class are not listed on any National Securities Exchange, a day on which banking institutions in New York City generally are open.

     “ transfer ” has the meaning assigned to such term in Section 4.4(a).

     “ Transfer Agent ” means such bank, trust company or other Person (including the General Partner or one of its Affiliates) as shall be appointed from time to time by the General Partner to act as registrar and transfer agent for the Common Units; provided , that if no Transfer Agent is specifically designated for any other Partnership Securities, the General Partner shall act in such capacity.

     “ Transfer Application ” means an application and agreement for transfer of Units in the form set forth on the back of a Certificate or in a form substantially to the same effect in a separate instrument.

     “ Underwriter ” means each Person named as an underwriter in Schedule I to the Underwriting Agreement who purchases Common Units pursuant thereto.

     “ Underwriting Agreement ” means that certain Underwriting Agreement dated as of November 15, 2007 among the Underwriters, the Partnership, the General Partner and the other parties thereto, providing for the purchase of Common Units by the Underwriters.

     “ Unit ” means a Partnership Security that is designated as a “Unit” and shall include Common Units, Class B Units and Subordinated Units but shall not include (i) General Partner Units (or the General Partner Interest represented thereby) or (ii) Incentive Distribution Rights.

     “ Unit Majority ” means (i) during the Subordination Period, at least a majority of the Outstanding Common Units (excluding Common Units owned by the General Partner and its Affiliates), voting as a class, and at least a majority of the Outstanding Subordinated Units, voting as a class, and (ii) after the end of the Subordination Period, at least a majority of the Outstanding Common Units and Class B Units, if any, voting as a single class.

     “ Unitholders ” means the holders of Units.

     “ Unpaid MQD ” has the meaning assigned to such term in Section 6.1(c)(i)(B).

     “ Unrealized Gain ” attributable to any item of Partnership property means, as of any date of determination, the excess, if any, of (a) the fair market value of such property as of such date (as determined under Section 5.5(d)) over (b) the Carrying Value of such property as of such date (prior to any adjustment to be made pursuant to Section 5.5(d) as of such date).

     “ Unrealized Loss ” attributable to any item of Partnership property means, as of any date of determination, the excess, if any, of (a) the Carrying Value of such property as of such date (prior to any adjustment to be made pursuant to Section 5.5(d) as of such date) over (b) the fair market value of such property as of such date (as determined under Section 5.5(d)).

     “ Unrecovered Initial Unit Price ” means at any time, with respect to a Unit, the Initial Unit Price less the sum of all distributions constituting Capital Surplus theretofore made in respect of an Initial Common Unit and any distributions of cash (or the Net Agreed Value of any distributions in kind) in connection with the dissolution and liquidation of the Partnership theretofore made in respect of an Initial Common Unit, adjusted as the General Partner determines to be appropriate to give effect to any distribution, subdivision or combination of such Units.

     “ U.S. GAAP ” means United States generally accepted accounting principles consistently applied.

     “ WIC ” means Wyoming Interstate Company, Ltd., a Colorado limited partnership.

     “ Withdrawal Opinion of Counsel ” has the meaning assigned to such term in Section 11.1(b).

     “ Working Capital Borrowings ” means borrowings used solely for working capital purposes or to pay distributions to Partners made pursuant to a credit facility, commercial paper facility or other similar financing arrangements, provided that when such borrowings are incurred it is the intent of the borrower to repay such borrowings within 12 months from other than Working Capital Borrowings.

     “ WYCO ” means WYCO Development LLC, a Delaware limited liability company.

      Section 1.2 Construction .

     Unless the context requires otherwise: (a) any pronoun used in this Agreement shall include the corresponding masculine, feminine or neuter forms, and the singular form of nouns, pronouns and verbs shall include the plural and vice versa; (b) references to Articles and Sections refer to Articles and Sections of this Agreement; (c) the terms “include”, “includes”, “including” or words of like import shall be deemed to be followed by the words “without limitation”; and (d) the terms “hereof”, “herein” or “hereunder” refer to this Agreement as a whole and not to any particular provision of this Agreement. The and headings contained in this Agreement are for reference purposes only, and shall not affect in any way the meaning or interpretation of this Agreement.

ARTICLE II

ORGANIZATION

      Section 2.1 Formation .

     The General Partner and the Organizational Limited Partner have previously formed the Partnership as a limited partnership pursuant to the provisions of the Delaware Act and hereby amend and restate the original Agreement of Limited Partnership of El Paso Pipeline Partners, L.P. in its entirety. This amendment and restatement shall become effective on the date of this Agreement. Except as expressly provided to the contrary in this Agreement, the rights, duties (including fiduciary duties), liabilities and obligations of the Partners and the administration, dissolution and termination of the Partnership shall be governed by the Delaware Act. All Partnership Interests shall constitute personal property of the owner thereof for all purposes.

      Section 2.2 Name .

     The name of the Partnership shall be “El Paso Pipeline Partners, L.P.” The Partnership’s business may be conducted under any other name or names as determined by the General Partner, including the name of the General Partner. The words “Limited Partnership,” “LP,” “Ltd.” or similar words or letters shall be included in the Partnership’s name where necessary for the purpose of complying with the laws of any jurisdiction that so requires. The General Partner may change the name of the Partnership at any time and from time to time and shall notify the Limited Partners of such change in the next regular communication to the Limited Partners.

      Section 2.3 Registered Office; Registered Agent; Principal Office; Other Offices .

     Unless and until changed by the General Partner, the registered office of the Partnership in the State of Delaware shall be located at 1209 Orange Street, Wilmington, New Castle County, Delaware 19801, and the registered agent for service of process on the Partnership in the State of Delaware at such registered office shall be The Corporation Trust Company. The principal office of the Partnership shall be located at 1001 Louisiana Street, Houston, Texas 77002, or such other place as the General Partner may from time to time designate by notice to the Limited Partners. The Partnership may maintain offices at such other place or places within or outside the State of Delaware as the General Partner shall determine necessary or appropriate. The address of the General Partner shall be 1001 Louisiana Street, Houston, Texas 77002, or such other place as the General Partner may from time to time designate by notice to the Limited Partners.

      Section 2.4 Purpose and Business .

     The purpose and nature of the business to be conducted by the Partnership shall be to (a) engage directly in, or enter into or form, hold and dispose of any corporation, partnership, joint venture, limited liability company or other arrangement to engage indirectly in, any business activity that is approved by the General Partner and that lawfully may be conducted by a limited partnership organized pursuant to the Delaware Act and, in connection therewith, to exercise all of the rights and powers conferred upon the Partnership pursuant to the agreements relating to such business activity, and (b) do anything necessary or appropriate to the foregoing,

including the making of capital contributions or loans to a Group Member; provided, however , that the General Partner shall not cause the Partnership to engage, directly or indirectly, in any business activity that the General Partner determines would cause the Partnership to be treated as an association taxable as a corporation or otherwise taxable as an entity for federal income tax purposes. To the fullest extent permitted by law, the General Partner shall have no duty or obligation to propose or approve, and may decline to propose or approve, the conduct by the Partnership of any business free of any fiduciary duty or obligation whatsoever to the Partnership, any Limited Partner or any Assignee and, in declining to so propose or approve, shall not be required to act in good faith or pursuant to any other standard imposed by this Agreement, any Group Member Agreement, any other agreement contemplated hereby or under the Delaware Act or any other law, rule or regulation or at equity.

      Section 2.5 Powers .

     The Partnership shall be empowered to do any and all acts and things necessary or appropriate for the furtherance and accomplishment of the purposes and business described in Section 2.4 and for the protection and benefit of the Partnership.

      Section 2.6 Power of Attorney .

     (a) Each Limited Partner and each Assignee hereby constitutes and appoints the General Partner and, if a Liquidator shall have been selected pursuant to Section 12.3, the Liquidator (and any successor to the Liquidator by merger, transfer, assignment, election or otherwise) and each of their authorized officers and attorneys-in-fact, as the case may be, with full power of substitution, as his true and lawful agent and attorney-in-fact, with full power and authority in his name, place and stead, to:

          (i) execute, swear to, acknowledge, deliver, file and record in the appropriate public offices (A) all certificates, documents and other instruments (including this Agreement and the Certificate of Limited Partnership and all amendments or restatements hereof or thereof) that the General Partner or the Liquidator determines to be necessary or appropriate to form, qualify or continue the existence or qualification of the Partnership as a limited partnership (or a partnership in which the limited partners have limited liability) in the State of Delaware and in all other jurisdictions in which the Partnership may conduct business or own property; (B) all certificates, documents and other instruments that the General Partner or the Liquidator determines to be necessary or appropriate to reflect, in accordance with its terms, any amendment, change, modification or restatement of this Agreement; (C) all certificates, documents and other instruments (including conveyances and a certificate of cancellation) that the General Partner or the Liquidator determines to be necessary or appropriate to reflect the dissolution and liquidation of the Partnership pursuant to the terms of this Agreement; (D) all certificates, documents and other instruments relating to the admission, withdrawal, removal or substitution of any Partner pursuant to, or other events described in, Article IV, Article X, Article XI or Article XII; (E) all certificates, documents and other instruments relating to the determination of the rights, preferences and privileges of any class or series of Partnership Securities issued pursuant to Section 5.6; and (F) all certificates, documents and other instruments (including agreements and a certificate of merger or conversion) relating to a merger, consolidation or conversion of the Partnership pursuant to Article XIV; and

          (ii) execute, swear to, acknowledge, deliver, file and record all ballots, consents, approvals, waivers, certificates, documents and other instruments that the General Partner or the Liquidator determines to be necessary or appropriate to (A) make, evidence, give, confirm or ratify any vote, consent, approval, agreement or other action that is made or given by the Partners hereunder or is consistent with the terms of this Agreement or (B) effectuate the terms or intent of this Agreement; provided , that when required by Section 13.3 or any other provision of this Agreement that establishes a percentage of the Limited Partners or of the Limited Partners of any class or series required to take any action, the General Partner and the Liquidator may exercise the power of attorney made in this Section 2.6(a)(ii) only after the necessary vote, consent or approval of the Limited Partners or of the Limited Partners of such class or series, as applicable.

     Nothing contained in this Section 2.6(a) shall be construed as authorizing the General Partner to amend this Agreement except in accordance with Article XIII or as may be otherwise expressly provided for in this Agreement.

     (b) The foregoing power of attorney is hereby declared to be irrevocable and a power coupled with an interest, and it shall survive and, to the maximum extent permitted by law, not be affected by, the subsequent death, incompetency, disability, incapacity, dissolution, bankruptcy or termination of any Limited Partner or Assignee and the transfer of all or any portion of such Limited Partner’s or Assignee’s Partnership Interest and shall extend to such Limited Partner’s or Assignee’s heirs, successors, assigns and personal representatives. Each such Limited Partner or Assignee hereby agrees to be bound by any representation made by the General Partner or the Liquidator acting in good faith pursuant to such power of attorney; and each such Limited Partner or Assignee, to the maximum extent permitted by law, hereby waives any and all defenses that may be available to contest, negate or disaffirm the action of the General Partner or the Liquidator taken in good faith under such power of attorney. Each Limited Partner or Assignee shall execute and deliver to the General Partner or the Liquidator, within 15 days after receipt of the request therefor, such further designation, powers of attorney and other instruments as the General Partner or the Liquidator may request in order to effectuate this Agreement and the purposes of the Partnership.

      Section 2.7 Term .

     The term of the Partnership commenced upon the filing of the Certificate of Limited Partnership in accordance with the Delaware Act and shall continue in existence until the dissolution of the Partnership in accordance with the provisions of Article XII. The existence of the Partnership as a separate legal entity shall continue until the cancellation of the Certificate of Limited Partnership as provided in the Delaware Act.

      Section 2.8 Title to Partnership Assets .

     Title to Partnership assets, whether real, personal or mixed and whether tangible or intangible, shall be deemed to be owned by the Partnership as an entity, and no Partner or Assignee, individually or collectively, shall have any ownership interest in such Partnership assets or any portion thereof. Title to any or all of the Partnership assets may be held in the name of the Partnership, the General Partner, one or more of its Affiliates or one or more

nominees, as the General Partner may determine. The General Partner hereby declares and warrants that any Partnership assets for which record title is held in the name of the General Partner or one or more of its Affiliates or one or more nominees shall be held by the General Partner or such Affiliate or nominee for the use and benefit of the Partnership in accordance with the provisions of this Agreement; provided, however , that the General Partner shall use reasonable efforts to cause record title to such assets (other than those assets in respect of which the General Partner determines that the expense and difficulty of conveyancing makes transfer of record title to the Partnership impracticable) to be vested in the Partnership as soon as reasonably practicable; provided , further , that, prior to the withdrawal or removal of the General Partner or as soon thereafter as practicable, the General Partner shall use reasonable efforts to effect the transfer of record title to the Partnership and, prior to any such transfer, will provide for the use of such assets in a manner satisfactory to the General Partner. All Partnership assets shall be recorded as the property of the Partnership in its books and records, irrespective of the name in which record title to such Partnership assets is held.

      Section 2.9 Certain Undertakings Relating to the Separateness of the Partnership .

     (a) The Partnership shall conduct its business and operations separate and apart from those of any other Person (other than the General Partner) in accordance with this Section 2.9.

     (b) The Partnership shall maintain (i) its books and records, (ii) its accounts, and (iii) its financial statements, separate from those of any other Person, except its consolidated Subsidiaries.

     (c) The Partnership shall not commingle or pool its funds or other assets with those of any other Person, except its consolidated Subsidiaries, and shall maintain its assets in a manner that is not costly or difficult to segregate, ascertain or otherwise identify as separate from those of any other Person.

     (d) The Partnership (i) shall observe all partnership formalities and other formalities required by its organizational documents, the laws of the jurisdiction of its formation, or other laws, rules, regulations and orders of governmental authorities exercising jurisdiction over it, (ii) may engage in transactions with the General Partner and its Affiliates (other than another Group Member) in conformity with the requirements of Section 7.9 or otherwise in accordance with applicable law) and (iii) promptly pay, form its own funds, and on a current basis, its allocable share of general and administrative expenses, capital expenditures and costs for shared services performed by Affiliates of the General Partner (other than another Group Member). Each material contract between the Partnership or another Group Member, on the one hand, and the Affiliates of the General Partner (other than a Group Member), on the other hand, shall be in writing.

     (e) Failure by the General Partner or the Partnership to comply with any of the obligations set forth in this Section 2.9 shall not affect the status of the Partnership as a separate legal entity, with its separate assets and separate liabilities. The General Partner and the Partnership may be consolidated for financial reporting purposes with El Paso Corporation and its subsidiaries; provided , however , that such consolidation shall not affect the status of the Partnership as a separate legal entity with its separate assets and separate liabilities.

ARTICLE III

RIGHTS OF LIMITED PARTNERS

      Section 3.1 Limitation of Liability .

     The Limited Partners and the Assignees shall have no liability under this Agreement except as expressly provided in this Agreement or the Delaware Act.

      Section 3.2 Management of Business .

     No Limited Partner or Assignee, in its capacity as such, shall participate in the operation, management or control (within the meaning of the Delaware Act) of the Partnership’s business, transact any business in the Partnership’s name or have the power to sign documents for or otherwise bind the Partnership. Any action taken by any Affiliate of the General Partner or any officer, director, employee, manager, member, general partner, agent or trustee of the General Partner or any of its Affiliates, or any officer, director, employee, manager, member, general partner, agent or trustee of a Group Member, in its capacity as such, shall not be deemed to be participation in the control of the business of the Partnership by a limited partner of the Partnership (within the meaning of Section 17-303(a) of the Delaware Act) and shall not affect, impair or eliminate the limitations on the liability of the Limited Partners or Assignees under this Agreement.

      Section 3.3 Outside Activities of the Limited Partners .

     Subject to the provisions of Section 7.5, any Limited Partner or Assignee shall be entitled to and may have business interests and engage in business activities in addition to those relating to the Partnership, including business interests and activities in direct competition with the Partnership Group. Neither the Partnership nor any of the other Partners or Assignees shall have any rights by virtue of this Agreement in any business ventures of any Limited Partner or Assignee.

      Section 3.4 Rights of Limited Partners .

     (a) In addition to other rights provided by this Agreement or by applicable law, and except as limited by Section 3.4(b), each Limited Partner shall have the right, for a purpose reasonably related to such Limited Partner’s interest as a Limited Partner in the Partnership, upon reasonable written demand stating the purpose of such demand, and at such Limited Partner’s own expense:

          (i) to obtain true and full information regarding the status of the business and financial condition of the Partnership;

          (ii) promptly after its becoming available, to obtain a copy of the Partnership’s federal, state and local income tax returns for each year;

          (iii) to obtain a current list of the name and last known business, residence or mailing address of each Partner;

          (iv) to obtain a copy of this Agreement and the Certificate of Limited Partnership and all amendments thereto, together with copies of the executed copies of all powers of attorney pursuant to which this Agreement, the Certificate of Limited Partnership and all amendments thereto have been executed;

          (v) to obtain true and full information regarding the amount of cash and a description and statement of the Net Agreed Value of any other Capital Contribution by each Partner and that each Partner has agreed to contribute in the future, and the date on which each became a Partner; and

          (vi) to obtain such other information regarding the affairs of the Partnership as is just and reasonable.

     (b) The General Partner may keep confidential from the Limited Partners and Assignees, for such period of time as the General Partner deems reasonable, (i) any information that the General Partner reasonably believes to be in the nature of trade secrets or (ii) other information the disclosure of which the General Partner in good faith believes (A) is not in the best interests of the Partnership Group, (B) could damage the Partnership Group or its business or (C) that any Group Member is required by law or by agreement with any third party to keep confidential (other than agreements with Affiliates of the Partnership the primary purpose of which is to circumvent the obligations set forth in this Section 3.4).

ARTICLE IV

CERTIFICATES; RECORD HOLDERS; TRANSFER OF
PARTNERSHIP INTERESTS; REDEMPTION OF PARTNERSHIP INTERESTS

      Section 4.1 Certificates .

     Upon the Partnership’s issuance of Common Units, Subordinated Units or Class B Units to any Person, the Partnership shall issue, upon the request of such Person, one or more Certificates in the name of such Person (or, if issued in global form, in the name of the Depositary or its nominee) evidencing the number of such Units being so issued. In addition, (a) upon the General Partner’s request, the Partnership shall issue to it one or more Certificates in the name of the General Partner evidencing its General Partner Units and (b) upon the request of any Person owning Incentive Distribution Rights or any other Partnership Securities other than Common Units, Subordinated Units or Class B Units, the Partnership shall issue to such Person one or more certificates evidencing such Incentive Distribution Rights or other Partnership Securities other than Common Units, Subordinated Units or Class B Units. Certificates shall be executed on behalf of the Partnership by the Chairman of the Board, Chief Executive Officer, President, Chief Financial Officer or any Vice President and the Secretary, any Assistant Secretary, or other authorized officer or director of the General Partner. No Common Unit Certificate shall be valid for any purpose until it has been countersigned by the Transfer Agent; provided, however , that, notwithstanding any provision to the contrary in this Section 4.1 or elsewhere in this Agreement, Units may be certificated or uncertificated as provided in the Delaware Act; provided , further , that if the General Partner elects to issue Common Units in global form, the Common Unit Certificates shall be valid upon receipt of a certificate from the

Transfer Agent certifying that the Common Units have been duly registered in accordance with the directions of the Partnership. Subject to the requirements of Section 6.7(b) and Section 6.7(c), the Partners holding Certificates evidencing Subordinated Units may exchange such Certificates for Certificates evidencing Common Units on or after the date on which such Subordinated Units are converted into Common Units pursuant to the terms of Section 5.7. Subject to the requirements of Section 6.7(e), the Partners holding Certificates evidencing Class B Units may exchange such Certificates for Certificates evidencing Common Units on or after the period set forth in Section 5.11(f) pursuant to the terms of Section 5.11.

      Section 4.2 Mutilated, Destroyed, Lost or Stolen Certificates .

     (a) If any mutilated Certificate is surrendered to the Transfer Agent (for Common Units) or the General Partner (for Partnership Securities other than Common Units), the appropriate officers of the General Partner on behalf of the Partnership shall execute, and the Transfer Agent (for Common Units) or the General Partner (for Partnership Securities other than Common Units) shall countersign and deliver in exchange therefor, a new Certificate evidencing the same number and type of Partnership Securities as the Certificate so surrendered.

     (b) The appropriate officers of the General Partner on behalf of the Partnership shall execute and deliver, and the Transfer Agent (for Common Units) shall countersign, a new Certificate in place of any Certificate previously issued, or issue uncertificated Common Units, if the Record Holder of the Certificate:

          (i) makes proof by affidavit, in form and substance satisfactory to the General Partner, that a previously issued Certificate has been lost, destroyed or stolen;

          (ii) requests the issuance of a new Certificate or the issuance of uncertificated Units before the General Partner has notice that the Certificate has been acquired by a purchaser for value in good faith and without notice of an adverse claim;

          (iii) if requested by the General Partner, delivers to the General Partner a bond, in form and substance satisfactory to the General Partner, with surety or sureties and with fixed or open penalty as the General Partner may direct to indemnify the Partnership, the Partners, the General Partner and the Transfer Agent against any claim that may be made on account of the alleged loss, destruction or theft of the Certificate; and

          (iv) satisfies any other reasonable requirements imposed by the General Partner.

     If a Limited Partner or Assignee fails to notify the General Partner within a reasonable period of time after he has notice of the loss, destruction or theft of a Certificate, and a transfer of the Limited Partner Interests represented by the Certificate is registered before the Partnership, the General Partner or the Transfer Agent receives such notification, the Limited Partner or Assignee shall be precluded from making any claim against the Partnership, the General Partner or the Transfer Agent for such transfer or for a new Certificate or uncertificated Units.

     (c) As a condition to the issuance of any new Certificate or uncertificated Units under this Section 4.2, the General Partner may require the payment of a sum sufficient to cover any

tax or other governmental charge that may be imposed in relation thereto and any other expenses (including the fees and expenses of the Transfer Agent) reasonably connected therewith.

      Section 4.3 Record Holders .

     The Partnership shall be entitled to recognize the Record Holder as the Partner or Assignee with respect to any Partnership Interest and, accordingly, shall not be bound to recognize any equitable or other claim to, or interest in, such Partnership Interest on the part of any other Person, regardless of whether the Partnership shall have actual or other notice thereof, except as otherwise provided by law or any applicable rule, regulation, guideline or requirement of any National Securities Exchange on which such Partnership Interests are listed or admitted to trading. Without limiting the foregoing, when a Person (such as a broker, dealer, bank, trust company or clearing corporation or an agent of any of the foregoing) is acting as nominee, agent or in some other representative capacity for another Person in acquiring and/or holding Partnership Interests, as between the Partnership on the one hand, and such other Persons on the other, such representative Person (a) shall be the Partner or Assignee (as the case may be) of record and beneficially, and (b) shall be bound by this Agreement and shall have the rights and obligations of a Partner or Assignee (as the case may be) hereunder and as, and to the extent, provided for herein.

      Section 4.4 Transfer Generally .

     (a) The term “transfer,” when used in this Agreement with respect to a Partnership Interest, shall be deemed to refer to a transaction (i) by which the General Partner assigns its General Partner Units to another Person or by which a holder of Incentive Distribution Rights assigns its Incentive Distribution Rights to another Person, and includes a sale, assignment, gift, pledge, encumbrance, hypothecation, mortgage, exchange or any other disposition by law or otherwise or (ii) by which the holder of a Limited Partner Interest (other than an Incentive Distribution Right) assigns such Limited Partner Interest to another Person who is or becomes a Limited Partner or an Assignee, and includes a sale, assignment, gift, exchange or any other disposition by law or otherwise, excluding a pledge, encumbrance, hypothecation or mortgage but including any transfer upon foreclosure of any pledge, encumbrance, hypothecation or mortgage.

     (b) No Partnership Interest shall be transferred, in whole or in part, except in accordance with the terms and conditions set forth in this Article IV. Any transfer or purported transfer of a Partnership Interest not made in accordance with this Article IV shall be, to the fullest extent permitted by law, null and void.

     (c) Nothing contained in this Agreement shall be construed to prevent a disposition by any stockholder, member, partner or other owner of the General Partner of any or all of the shares of stock, membership or limited liability company interests, partnership interests or other ownership interests in the General Partner.

      Section 4.5 Registration and Transfer of Limited Partner Interests .

     (a) The General Partner shall keep or cause to be kept on behalf of the Partnership a register in which, subject to such reasonable regulations as it may prescribe and subject to the

provisions of Section 4.5(b), the Partnership will provide for the registration and transfer of Limited Partner Interests. The Transfer Agent is hereby appointed registrar and transfer agent for the purpose of registering Common Units and transfers of such Common Units as herein provided. The Partnership shall not recognize transfers of Certificates evidencing Limited Partner Interests unless such transfers are effected in the manner described in this Section 4.5. Upon surrender of a Certificate for registration of transfer of any Limited Partner Interests evidenced by a Certificate, and subject to the provisions of Section 4.5(b), the appropriate officers of the General Partner on behalf of the Partnership shall execute and deliver, and in the case of Common Units, the Transfer Agent shall countersign and deliver, in the name of the holder or the designated transferee or transferees, as required pursuant to the holder’s instructions, one or more new Certificates, or evidence of the issuance of uncertificated Common Units, evidencing the same aggregate number and type of Limited Partner Interests as was evidenced by the Certificate so surrendered.

     (b) Except as otherwise provided in Section 4.9, the General Partner shall not recognize any transfer of Limited Partner Interests until the Certificates evidencing such Limited Partner Interests, or other evidence of uncertificated Limited Partner Interests, are surrendered for registration of transfer and such Certificates are accompanied by a Transfer Application, properly completed and including a Taxation Certification, duly executed by the transferee (or the transferee’s attorney-in-fact duly authorized in writing). No charge shall be imposed by the General Partner for such transfer; provided , that as a condition to the issuance of any new Certificate, or uncertificated issuance of Units, under this Section 4.5, the General Partner may require the payment of a sum sufficient to cover any tax or other governmental charge that may be imposed with respect thereto. No distributions or allocations will be made in respect of the Limited Partner Interests until a properly completed Transfer Application has been delivered with respect to such Limited Partner Interests.

     (c) Upon the receipt of proper transfer instructions from the registered owner of uncertificated Common Units, such uncertificated Common Units shall be cancelled, issuance of new equivalent uncertificated Common Units or Certificates shall be made to the holder of Common Units entitled thereto and the transaction shall be recorded upon the books of the Partnership.

     (d) Limited Partner Interests may be transferred only in the manner described in this Section 4.5. The transfer of any Limited Partner Interests and the admission of any new Limited Partner shall not constitute an amendment to this Agreement.

     (e) Until admitted as a Substituted Limited Partner pursuant to Section 10.2, the Record Holder of a Limited Partner Interest shall be an Assignee in respect of such Limited Partner Interest. Limited Partners may include custodians, nominees or any other individual or entity in its own or any representative capacity.

     (f) A transferee of a Limited Partner Interest who has completed and delivered a Transfer Application shall be deemed to have (i) requested admission as a Substituted Limited Partner, (ii) agreed to comply with and be bound by and to have executed this Agreement, (iii) represented and warranted that such transferee has the right, power and authority and, if an individual, the capacity to enter into this Agreement, (iv) granted the powers of attorney set forth

in this Agreement, and (v) given the consents and approvals and made the waivers contained in this Agreement.

     (g) The General Partner and its Affiliates shall have the right at any time to transfer their Subordinated Units, Class B Units and Common Units (whether issued upon conversion of the Subordinated Units or otherwise) to one or more Persons.

      Section 4.6 Transfer of the General Partner’s General Partner Interest .

     (a) Subject to Section 4.6(c) below, prior to December 31, 2017, the General Partner shall not transfer all or any part of its General Partner Interest (represented by General Partner Units) to a Person unless such transfer (i) has been approved by the prior written consent or vote of the holders of at least a majority of the Outstanding Common Units (excluding Common Units held by the General Partner and its Affiliates) or (ii) is of all, but not less than all, of its General Partner Interest to (A) an Affiliate of the General Partner (other than an individual) or (B) another Person (other than an individual) in connection with the merger or consolidation of the General Partner with or into such other Person or the transfer by the General Partner of all or substantially all of its assets to such other Person.

     (b) Subject to Section 4.6(c) below, on or after December 31, 2017, the General Partner may transfer all or any of its General Partner Interest without Unitholder approval.

     (c) Notwithstanding anything herein to the contrary, no transfer by the General Partner of all or any part of its General Partner Interest to another Person shall be permitted unless (i) the transferee agrees to assume the rights and duties of the General Partner under this Agreement and to be bound by the provisions of this Agreement, (ii) the Partnership receives an Opinion of Counsel that such transfer would not result in the loss of limited liability of any Limited Partner under the Delaware Act or cause the Partnership to be treated as an association taxable as a corporation or otherwise to be taxed as an entity for federal income tax purposes (to the extent not already so treated or taxed) and (iii) such transferee also agrees to purchase all (or the appropriate portion thereof, if applicable) of the partnership or membership interest of the General Partner as the general partner or managing member, if any, of each other Group Member. In the case of a transfer pursuant to and in compliance with this Section 4.6, the transferee or successor (as the case may be) shall, subject to compliance with the terms of Section 10.3, be admitted to the Partnership as the General Partner immediately prior to the transfer of the General Partner Interest, and the business of the Partnership shall continue without dissolution.

      Section 4.7 Transfer of Incentive Distribution Rights .

     Prior to December 31, 2017, a holder of Incentive Distribution Rights may transfer any or all of the Incentive Distribution Rights held by such holder without any consent of the Unitholders to (a) an Affiliate of such holder (other than an individual) or (b) another Person (other than an individual) in connection with (i) the merger or consolidation of such holder of Incentive Distribution Rights with or into such other Person, (ii) the transfer by such holder of all or substantially all of its assets to such other Person or (iii) the sale of all the ownership interests in such holder. Any other transfer of the Incentive Distribution Rights prior to December 31,

2017 shall require the prior approval of holders of at least a majority of the Outstanding Common Units (excluding Common Units held by the General Partner and its Affiliates). On or after December 31, 2017, the General Partner or any other holder of Incentive Distribution Rights may transfer any or all of its Incentive Distribution Rights without Unitholder approval. Notwithstanding anything herein to the contrary, (i) the transfer of Class B Units issued pursuant to Section 5.11, or the transfer of Common Units issued upon conversion of the Class B Units, shall not be treated as a transfer of all or any part of the Incentive Distribution Rights and (ii) no transfer of Incentive Distribution Rights to another Person shall be permitted unless the transferee agrees to be bound by the provisions of this Agreement.

      Section 4.8 Restrictions on Transfers .

     (a) Except as provided in Section 4.8(e) below, and notwithstanding the other provisions of this Article IV, no transfer of any Partnership Interests shall be made if such transfer would (i) violate the then applicable federal or state securities laws or rules and regulations of the Commission, any state securities commission or any other governmental authority with jurisdiction over such transfer, (ii) terminate the existence or qualification of the Partnership under the laws of the jurisdiction of its formation, or (iii) cause the Partnership to be treated as an association taxable as a corporation or otherwise to be taxed as an entity for federal income tax purposes (to the extent not already so treated or taxed).

     (b) The General Partner may impose restrictions on the transfer of Partnership Interests if it receives an Opinion of Counsel that such restrictions are necessary to avoid a significant risk of the Partnership becoming taxable as a corporation or otherwise becoming taxable as an entity for federal income tax purposes. The General Partner may impose such restrictions by amending this Agreement; provided, however , that any amendment that would result in the delisting or suspension of trading of any class of Limited Partner Interests on the principal National Securities Exchange on which such class of Limited Partner Interests is then listed or admitted to trading must be approved, prior to such amendment being effected, by the holders of at least a majority of the Outstanding Limited Partner Interests of such class.

     (c) The transfer of a Subordinated Unit that has converted into a Common Unit shall be subject to the restrictions imposed by Section 6.7(c).

     (d) The transfer of a Class B Unit that has converted into a Common Unit shall be subject to the restrictions imposed by Section 6.7(e).

     (e) Nothing contained in this Article IV, or elsewhere in this Agreement, shall preclude the settlement of any transactions involving Partnership Interests entered into through the facilities of any National Securities Exchange on which such Partnership Interests are listed or admitted to trading.

     (f) Each certificate evidencing Partnership Interests shall bear a conspicuous legend in substantially the following form:

THE HOLDER OF THIS SECURITY ACKNOWLEDGES FOR THE BENEFIT OF EL PASO PIPELINE PARTNERS, L.P. THAT THIS SECURITY MAY NOT BE SOLD, OFFERED,

RESOLD, PLEDGED OR OTHERWISE TRANSFERRED IF SUCH TRANSFER WOULD (A) VIOLATE THE THEN APPLICABLE FEDERAL OR STATE SECURITIES LAWS OR RULES AND REGULATIONS OF THE SECURITIES AND EXCHANGE COMMISSION, ANY STATE SECURITIES COMMISSION OR ANY OTHER GOVERNMENTAL AUTHORITY WITH JURISDICTION OVER SUCH TRANSFER, (B) TERMINATE THE EXISTENCE OR QUALIFICATION OF EL PASO PIPELINE PARTNERS, L.P. UNDER THE LAWS OF THE STATE OF DELAWARE, OR (C) CAUSE EL PASO PIPELINE PARTNERS, L.P. TO BE TREATED AS AN ASSOCIATION TAXABLE AS A CORPORATION OR OTHERWISE TO BE TAXED AS AN ENTITY FOR FEDERAL INCOME TAX PURPOSES (TO THE EXTENT NOT ALREADY SO TREATED OR TAXED). EL PASO PIPELINE PARTNERS GP COMPANY, L.L.C., THE GENERAL PARTNER OF EL PASO PIPELINE PARTNERS, L.P., MAY IMPOSE ADDITIONAL RESTRICTIONS ON THE TRANSFER OF THIS SECURITY IF IT RECEIVES AN OPINION OF COUNSEL THAT SUCH RESTRICTIONS ARE NECESSARY TO AVOID A SIGNIFICANT RISK OF EL PASO PIPELINE PARTNERS, L.P. BECOMING TAXABLE AS A CORPORATION OR OTHERWISE BECOMING TAXABLE AS AN ENTITY FOR FEDERAL INCOME TAX PURPOSES. THE RESTRICTIONS SET FORTH ABOVE SHALL NOT PRECLUDE THE SETTLEMENT OF ANY TRANSACTIONS INVOLVING THIS SECURITY ENTERED INTO THROUGH THE FACILITIES OF ANY NATIONAL SECURITIES EXCHANGE ON WHICH THIS SECURITY IS LISTED OR ADMITTED TO TRADING.

      Section 4.9 Tax Certifications; Ineligible Holders; Citizenship Certificates; Non-citizen Assignees .

     (a) If a transferee of a Limited Partner Interest fails to furnish a properly completed Taxation Certification in a Transfer Application or if, upon receipt of such Taxation Certification or otherwise, the General Partner determines that such transferee is not an Eligible Holder, the Limited Partner Interests owned by such transferee shall be subject to redemption in accordance with the provisions of Section 4.10.

     (b) The General Partner may request any Limited Partner or Assignee to furnish to the General Partner, within 30 days after receipt of such request, an executed Taxation Certification or such other information concerning his federal income tax status with respect to the income and loss generated by the Partnership (or, if the Limited Partner or Assignee is a nominee holding for the account of another Person, the federal income tax status of such Person) as the General Partner may request. If a Limited Partner or Assignee fails to furnish to the General Partner within the aforementioned 30-day period such Taxation Certification or other

requested information or if upon receipt of such Taxation Certification or other requested information the General Partner determines that a Limited Partner or Assignee is not an Eligible Holder, the Limited Partner Interests owned by such Limited Partner or Assignee shall be subject to redemption in accordance with the provisions of Section 4.10. In addition, the General Partner may require that the status of any such Limited Partner or Assignee be changed to that of an Ineligible Holder and, thereupon, such Non-citizen Assignee shall cease to be a Partner and shall have no voting rights in respect of his Limited Partner Interests. The General Partner shall be substituted for such Ineligible Holder as the Limited Partner or Assignee in respect of the Ineligible Holder’s Limited Partner Interests and shall vote such Limited Partner Interests in accordance with Section 4.9(d).

     (c) If any Group Member is or becomes subject to any federal, state or local law or regulation that the General Partner determines would create a substantial risk of cancellation or forfeiture of any property in which the Group Member has an interest based on the nationality, citizenship or other related status of a Limited Partner or Assignee, the General Partner may request any Limited Partner or Assignee to furnish to the General Partner, within 30 days after receipt of such request, an executed Citizenship Certification or such other information concerning his nationality, citizenship or other related status (or, if the Limited Partner or Assignee is a nominee holding for the account of another Person, the nationality, citizenship or other related status of such Person) as the General Partner may request. If a Limited Partner or Assignee fails to furnish to the General Partner within the aforementioned 30-day period such Citizenship Certification or other requested information or if upon receipt of such Citizenship Certification or other requested information the General Partner determines that a Limited Partner or Assignee is not an Eligible Citizen, the Limited Partner Interests owned by such Limited Partner or Assignee shall be subject to redemption in accordance with the provisions of Section 4.10. In addition, the General Partner may require that the status of any such Limited Partner or Assignee be changed to that of a Non-citizen Assignee and, thereupon, the General Partner shall be substituted for such Non-citizen Assignee as the Limited Partner in respect of the Non-citizen Assignee’s Limited Partner Interests.

     (d) The General Partner shall, in exercising voting rights in respect of Limited Partner Interests held by it on behalf of Non-citizen Assignees or Ineligible Holders, distribute the votes in the same ratios as the votes of Partners (including the General Partner) in respect of Limited Partner Interests other than those of Non-citizen Assignees or Ineligible Holders are cast, either for, against or abstaining as to the matter.

     (e) Upon dissolution of the Partnership, a Non-citizen Assignee or Ineligible Holder shall have no right to receive a distribution in kind pursuant to Section 12.4 but shall be entitled to the cash equivalent thereof, and the Partnership shall provide cash in exchange for an assignment of the Non-citizen Assignee’s or Ineligible Holder’s share of any distribution in kind. Such payment and assignment shall be treated for Partnership purposes as a purchase by the Partnership from the Non-citizen Assignee or Ineligible Holder of his Limited Partner Interest (representing his right to receive his share of such distribution in kind).

     (f) At any time after an Ineligible Holder can and does certify that it has become an Eligible Holder, such Ineligible Holder may, upon application to the General Partner, request admission as a Substituted Limited Partner with respect to any Limited Partner Interests of such

Ineligible Holder not redeemed pursuant to Section 4.10, and upon admission of such Ineligible Holder pursuant to Section 10.2, the General Partner shall cease to be deemed to be the Limited Partner in respect of such Ineligible Holder’s Limited Partner Interests.

     (g) At any time after he can and does certify that he has become an Eligible Citizen, a Non-citizen Assignee may, upon application to the General Partner, request admission as a Substituted Limited Partner with respect to any Limited Partner Interests of such Non-citizen Assignee not redeemed pursuant to Section 4.10, and upon admission of such Non-citizen Assignee pursuant to Section 10.2, the General Partner shall cease to be deemed to be the Limited Partner in respect of the Non-citizen Assignee’s Limited Partner Interests.

      Section 4.10 Redemption of Partnership Interests of Non-citizen and Ineligible Holders .

     (a) If at any time a Limited Partner, Assignee or transferee fails to furnish a Citizenship Certification, Taxation Certification or other information requested within the 30-day period specified in Section 4.9(b) or 4.9(c) or in a Transfer Application, or if upon receipt of such Citizenship Certification, Taxation Certification, Transfer Application or other information the General Partner determines, with the advice of counsel, that a Limited Partner, Assignee or transferee is not an Eligible Citizen or Eligible Holder, as the case may be, the Partnership may, unless the Limited Partner, Assignee or transferee establishes to the satisfaction of the General Partner that such Limited Partner, Assignee or transferee is an Eligible Citizen or Eligible Holder, as the case may be, or has transferred his Partnership Interests to a Person who is an Eligible Citizen or Eligible Holder, as the case may be, and who furnishes a Citizenship Certification or Taxation Certificate, as the case may be, to the General Partner prior to the date fixed for redemption as provided below, redeem the Limited Partner Interest of such Limited Partner, Assignee or transferee as follows:

          (i) The General Partner shall, not later than the 30th day before the date fixed for redemption, give notice of redemption to the Limited Partner, Assignee or transferee, at his last address designated on the records of the Partnership or the Transfer Agent, by registered or certified mail, postage prepaid. The notice shall be deemed to have been given when so mailed. The notice shall specify the Redeemable Interests or, if uncertificated, upon receipt of evidence satisfactory to the General Partner of the ownership of the Redeemable Interests, the date fixed for redemption, the place of payment, that payment of the redemption price will be made upon surrender of the Certificate evidencing the Redeemable Interests and that on and after the date fixed for redemption no further allocations or distributions to which such person would otherwise be entitled in respect of the Redeemable Interests will accrue or be made.

          (ii) The aggregate redemption price for Redeemable Interests shall be an amount equal to the lesser of (i) the Current Market Price (the date of determination of which shall be the date fixed for redemption) of Limited Partner Interests of the class to be so redeemed and (ii) the price paid for such Limited Partner Interests by the Limited Partner, Assignee or transferee. The redemption price shall be paid, as determined by the General Partner, in cash or by delivery of a promissory note of the Partnership in the principal amount of the redemption price, bearing interest at the rate of 5% annually and payable in three equal annual installments of principal together with accrued interest, commencing one year after the redemption date.

          (iii) Upon surrender by or on behalf of the Limited Partner, Assignee or transferee, at the place specified in the notice of redemption, of (x) if certificated, the Certificate evidencing the Redeemable Interests, duly endorsed in blank or accompanied by an assignment duly executed in blank, or (y) if uncertificated, upon receipt of evidence satisfactory to the General Partner of the ownership of the Redeemable Interests, the Limited Partner, Assignee or transferee or his duly authorized representative shall be entitled to receive the payment therefor.

          (iv) After the redemption date, Redeemable Interests shall no longer constitute issued and Outstanding Limited Partner Interests.

     (b) The provisions of this Section 4.10 shall also be applicable to Limited Partner Interests held by a Limited Partner or Assignee as nominee of a Person determined to be other than an Eligible Citizen or Eligible Holder, as the case may be.

     (c) Nothing in this Section 4.10 shall prevent the recipient of a notice of redemption from transferring his Limited Partner Interest before the redemption date if such transfer is otherwise permitted under this Agreement. Upon receipt of notice of such a transfer, the General Partner shall withdraw the notice of redemption, provided the transferee of such Limited Partner Interest certifies to the satisfaction of the General Partner that he is an Eligible Citizen or Eligible Holder, as the case may be. If the transferee fails to make such certification, such redemption shall be effected from the transferee on the original redemption date.

ARTICLE V

CAPITAL CONTRIBUTIONS AND
ISSUANCE OF PARTNERSHIP INTERESTS

      Section 5.1 Organizational Contributions .

     In connection with the formation of the Partnership under the Delaware Act, the General Partner made an initial Capital Contribution to the Partnership in the amount of $20.00, for a 2% General Partner Interest in the Partnership and has been admitted as the General Partner of the Partnership, and the Organizational Limited Partner made an initial Capital Contribution to the Partnership in the amount of $980.00 for a 98% Limited Partner Interest in the Partnership and has been admitted as a Limited Partner of the Partnership. As of the Closing Date and effective with the admission of another Limited Partner to the Partnership, the interest of the Organizational Limited Partner, or its successor, shall be redeemed as provided in the Contribution Agreement; and the initial Capital Contribution of the Organizational Limited Partner, or its successor, shall thereupon be refunded. Ninety-eight percent of any interest or other profit that may have resulted from the investment or other use of such initial Capital Contribution shall be allocated and distributed to the Organizational Limited Partner, or its successor, and the balance thereof shall be allocated and distributed to the General Partner.

      Section 5.2 Contributions by the General Partner and its Affiliates .

     (a) On the Closing Date and pursuant to the Contribution Agreement:

          (i) the General Partner shall contribute to the Partnership, as a Capital Contribution, a portion of its ownership interests in WIC Holdings Company, L.L.C. and El Paso Wyoming Gas Supply Company, L.L.C. in exchange for 1,732,963 General Partner Units representing a continuation of its 2% General Partner Interest, subject to all of the rights, privileges and duties of the General Partner under this Agreement, and the remaining portion of its ownership interests in WIC Holdings Company, L.L.C. and El Paso Wyoming Gas Supply Company, L.L.C. for (A) 121,698 Common Units and 27,727,411 Subordinated Units that the General Partner shall distribute to its sole member and thereafter shall be contributed to Holdings as provided in the Contribution Agreement, (B) the Incentive Distribution Rights, and (C) the right to receive a cash distribution of $665 million in part as reimbursement for certain capital expenditures in accordance with the Contribution Agreement; and

          (ii) Holdings shall contribute to the Partnership, as a Capital Contribution, all of its interest in EPPP SNG GP Holdings, L.L.C. and EPPP CIG GP Holdings, L.L.C., in exchange for 32,066,088 Common Units.

     (b) Upon the issuance of any additional Limited Partner Interests by the Partnership (other than the Common Units issued in the Initial Offering, the Common Units issued pursuant to the Over-Allotment Option, the Common Units and Subordinated Units issued pursuant to Section 5.2(a), any Class B Units issued pursuant to Section 5.11 and any Common Units issued upon conversion of Class B Units), the General Partner may, in exchange for a proportionate number of General Partner Units, make additional Capital Contributions in an amount equal to the product obtained by multiplying (i) the quotient determined by dividing (A) the General Partner’s Percentage Interest immediately prior to the issuance of such additional Limited Partner Interests by the Partnership by (B) 100 less the General Partner’s Percentage Interest immediately prior to the issuance of such additional Limited Partner Interests by the Partnership times (ii) the amount contributed to the Partnership by the Limited Partners in exchange for such additional Limited Partner Interests. Except as set forth in Article XII, the General Partner shall not be obligated to make any additional Capital Contributions to the Partnership.

      Section 5.3 Contributions by Initial Limited Partners .

     (a) On the Closing Date and pursuant to the Underwriting Agreement, each Underwriter shall contribute to the Partnership cash in an amount equal to the Issue Price per Initial Common Unit, multiplied by the number of Common Units specified in the Underwriting Agreement to be purchased by such Underwriter at the Closing Date. In exchange for such Capital Contributions by the Underwriters, the Partnership shall issue Common Units to each Underwriter on whose behalf such Capital Contribution is made in an amount equal to the quotient obtained by dividing (i) the cash contribution to the Partnership by or on behalf of such Underwriter by (ii) the Issue Price per Initial Common Unit.

     (b) Upon the exercise of the Over-Allotment Option, each Underwriter shall contribute to the Partnership cash in an amount equal to the Issue Price per Initial Common Unit,

multiplied by the number of Common Units to be purchased by such Underwriter at the Option Closing Date. In exchange for such Capital Contributions by the Underwriters, the Partnership shall issue Common Units to each Underwriter on whose behalf such Capital Contribution is made in an amount equal to the quotient obtained by dividing (i) the cash contributions to the Partnership by or on behalf of such Underwriter by (ii) the Issue Price per Initial Common Unit. Upon receipt by the Partnership of the Capital Contributions from the Underwriters as provided in this Section 5.3(b), the Partnership shall use such cash to purchase from Holdings that number of Common Units issued to the Underwriters as provided in this Section 5.3(b).

     (c) No Limited Partner Interests will be issued or issuable as of or at the Closing Date other than (i) the Common Units issuable pursuant to subparagraph (a) hereof in aggregate number equal to 25,000,000, (ii) the “ Option Units ” as such term is used in the Underwriting Agreement in an aggregate number up to 3,750,000 issuable upon exercise of the Over-Allotment Option pursuant to subparagraph (b) hereof, (iii) the 32,187,786 Common Units and 27,727,411 Subordinated Units issuable pursuant to Section 5.2(a) hereof, (iv) the Incentive Distribution Rights and (v) any Common Units issuable, or to satisfy the obligations of the Partnership or any of its Affiliates, under the Long-Term Incentive Plan.

      Section 5.4 Interest and Withdrawal of Capital Contributions .

     No interest shall be paid by the Partnership on Capital Contributions. No Partner or Assignee shall be entitled to the withdrawal or return of its Capital Contribution, except to the extent, if any, that distributions made pursuant to this Agreement or upon dissolution of the Partnership may be considered as such by law and then only to the extent provided for in this Agreement. Except to the extent expressly provided in this Agreement, no Partner or Assignee shall have priority over any other Partner or Assignee either as to the return of Capital Contributions or as to profits, losses or distributions. Any such return shall be a compromise to which all Partners or Assignees agree within the meaning of Section 17-502(b) of the Delaware Act.

      Section 5.5 Capital Accounts .

     (a) The Partnership shall maintain for each Partner (or a beneficial owner of Partnership Interests held by a nominee in any case in which the nominee has furnished the identity of such owner to the Partnership in accordance with Section 6031(c) of the Code or any other method acceptable to the General Partner) owning a Partnership Interest a separate Capital Account with respect to such Partnership Interest in accordance with the rules of Treasury Regulation Section 1.704-1(b)(2)(iv). Such Capital Account shall be increased by (i) the amount of all Capital Contributions made to the Partnership with respect to such Partnership Interest and (ii) all items of Partnership income and gain (including income and gain exempt from tax) computed in accordance with Section 5.5(b) and allocated with respect to such Partnership Interest pursuant to Section 6.1, and decreased by (x) the amount of cash or Net Agreed Value of all actual and deemed distributions of cash or property made with respect to such Partnership Interest and (y) all items of Partnership deduction and loss computed in accordance with Section 5.5(b) and allocated with respect to such Partnership Interest pursuant to Section 6.1.

     (b) For purposes of computing the amount of any item of income, gain, loss or deduction which is to be allocated pursuant to Article VI and is to be reflected in the Partners’ Capital Accounts, the determination, recognition and classification of any such item shall be the same as its determination, recognition and classification for federal income tax purposes (including any method of depreciation, cost recovery or amortization used for that purpose), provided , that:

          (i) Solely for purposes of this Section 5.5, the Partnership shall be treated as owning directly its proportionate share (as determined by the General Partner based upon the provisions of the applicable Group Member Agreement or governing, organizational or similar documents) of all property owned by (x) any other Group Member that is classified as a partnership for federal income tax purposes and (y) any other partnership, limited liability company, unincorporated business or other entity classified as a partnership for federal income tax purposes of which a Group Member is, directly or indirectly, a partner.

          (ii) All fees and other expenses incurred by the Partnership to promote the sale of (or to sell) a Partnership Interest that can neither be deducted nor amortized under Section 709 of the Code, if any, shall, for purposes of Capital Account maintenance, be treated as an item of deduction at the time such fees and other expenses are incurred and shall be allocated among the Partners pursuant to Section 6.1.

          (iii) Except as otherwise provided in Treasury Regulation Section 1.704-1(b)(2)(iv)(m), the computation of all items of income, gain, loss and deduction shall be made without regard to any election under Section 754 of the Code which may be made by the Partnership and, as to those items described in Section 705(a)(1)(B) or 705(a)(2)(B) of the Code, without regard to the fact that such items are not includable in gross income or are neither currently deductible nor capitalized for federal income tax purposes. To the extent an adjustment to the adjusted tax basis of any Partnership asset pursuant to Section 734(b) or 743(b) of the Code is required, pursuant to Treasury Regulation Section 1.704-1(b)(2)(iv)(m), to be taken into account in determining Capital Accounts, the amount of such adjustment in the Capital Accounts shall be treated as an item of gain or loss.

          (iv) Any income, gain or loss attributable to the taxable disposition of any Partnership property shall be determined as if the adjusted basis of such property as of such date of disposition were equal in amount to the Partnership’s Carrying Value with respect to such property as of such date.

          (v) In accordance with the requirements of Section 704(b) of the Code, any deductions for depreciation, cost recovery or amortization attributable to any Contributed Property shall be determined as if the adjusted basis of such property on the date it was acquired by the Partnership were equal to the Agreed Value of such property. Upon an adjustment pursuant to Section 5.5(d) to the Carrying Value of any Partnership property subject to depreciation, cost recovery or amortization, any further deductions for such depreciation, cost recovery or amortization attributable to such property shall be determined as if the adjusted basis of such property were equal to the Carrying Value of such property immediately following such adjustment.

          (vi) If the Partnership’s adjusted basis in a depreciable or cost recovery property is reduced for federal income tax purposes pursuant to Section 48(q)(1) or 48(q)(3) of the Code, the amount of such reduction shall, solely for purposes hereof, be deemed to be an additional depreciation or cost recovery deduction in the year such property is placed in service and shall be allocated among the Partners pursuant to Section 6.1. Any restoration of such basis pursuant to Section 48(q)(2) of the Code shall, to the extent possible, be allocated in the same manner to the Partners to whom such deemed deduction was allocated.

     (c) (i) A transferee of a Partnership Interest shall succeed to a Pro Rata portion of the Capital Account of the transferor relating to the Partnership Interest so transferred.

          (ii) Subject to Section 6.7(c), immediately prior to the transfer of a Subordinated Unit or of a Subordinated Unit that has converted into a Common Unit pursuant to Section 5.7 by a holder thereof (other than a transfer to an Affiliate unless the General Partner elects to have this subparagraph 5.5(c)(ii) apply), the Capital Account maintained for such Person with respect to its Subordinated Units or converted Subordinated Units will (A) first, be allocated to the Subordinated Units or converted Subordinated Units to be transferred in an amount equal to the product of (x) the number of such Subordinated Units or converted Subordinated Units to be transferred and (y) the Per Unit Capital Amount for a Common Unit, and (B) second, any remaining balance in such Capital Account will be retained by the transferor, regardless of whether it has retained any Subordinated Units or converted Subordinated Units ( “Retained Converted Subordinated Units” ). Following any such allocation, the transferor’s Capital Account, if any, maintained with respect to the retained Subordinated Units or Retained Converted Subordinated Units, if any, will have a balance equal to the amount allocated under clause (B) hereinabove, and the transferee’s Capital Account established with respect to the transferred Subordinated Units or converted Subordinated Units will have a balance equal to the amount allocated under clause (A) hereinabove.

     (d) (i) In accordance with Treasury Regulation Section 1.704-1(b)(2)(iv)(f), on an issuance of additional Partnership Interests for cash or Contributed Property, the issuance of Partnership Interests as consideration for the provision of services or the conversion of the General Partner’s Combined Interest to Common Units pursuant to Section 11.3(b), the Capital Account of each Partner and the Carrying Value of each Partnership property immediately prior to such issuance shall be adjusted upward or downward to reflect any Unrealized Gain or Unrealized Loss attributable to such Partnership property, as if such Unrealized Gain or Unrealized Loss had been recognized on an actual sale of each such property immediately prior to such issuance and had been allocated to the Partners at such time pursuant to Section 6.1(c) in the same manner as any item of gain or loss actually recognized during such period would have been allocated. In determining such Unrealized Gain or Unrealized Loss, the aggregate cash amount and fair market value of all Partnership assets (including cash or cash equivalents) immediately prior to the issuance of additional Partnership Interests shall be determined by the General Partner using such method of valuation as it may adopt; provided, however , that the General Partner, in arriving at such valuation, must take fully into account the fair market value of the Partnership Interests of all Partners at such time. The General Partner shall allocate such aggregate value among the assets of the Partnership (in such manner as it determines) to arrive at a fair market value for individual properties.

          (ii) In accordance with Treasury Regulation Section 1.704-1(b)(2)(iv)(f), immediately prior to any actual or deemed distribution to a Partner of any Partnership property (other than a distribution of cash that is not in redemption or retirement of a Partnership Interest), the Capital Accounts of all Partners and the Carrying Value of all Partnership property shall be adjusted upward or downward to reflect any Unrealized Gain or Unrealized Loss attributable to such Partnership property, as if such Unrealized Gain or Unrealized Loss had been recognized in a sale of such property immediately prior to such distribution for an amount equal to its fair market value, and had been allocated to the Partners, at such time, pursuant to Section 6.1(c) in the same manner as any item of gain or loss actually recognized during such period would have been allocated. In determining such Unrealized Gain or Unrealized Loss the aggregate cash amount and fair market value of all Partnership assets (including cash or cash equivalents) immediately prior to a distribution shall (A) in the case of an actual distribution that is not made pursuant to Section 12.4 or in the case of a deemed distribution, be determined and allocated in the same manner as that provided in Section 5.5(d)(i) or (B) in the case of a liquidating distribution pursuant to Section 12.4, be determined and allocated by the Liquidator using such method of valuation as it may adopt.

      Section 5.6 Issuances of Additional Partnership Securities .

     (a) The Partnership may issue additional Partnership Securities and options, rights, warrants and appreciation rights relating to the Partnership Securities (including pursuant to Section 7.4(c)) for any Partnership purpose at any time and from time to time to such Persons for such consideration and on such terms and conditions as the General Partner shall determine, all without the approval of any Limited Partners.

     (b) Each additional Partnership Security authorized to be issued by the Partnership pursuant to Section 5.6(a) or security authorized to be issued pursuant to Section 7.4(c) may be issued in one or more classes, or one or more series of any such classes, with such designations, preferences, rights, powers and duties (which may be senior to existing classes and series of Partnership Securities), as shall be fixed by the General Partner, including (i) the right to share in Partnership profits and losses or items thereof; (ii) the right to share in Partnership distributions; (iii) the rights upon dissolution and liquidation of the Partnership; (iv) whether, and the terms and