AMENDED AND RESTATED 5-YEAR REVOLVING CREDIT AGREEMENT

EXHIBIT 10.1

AMENDED AND RESTATED

5-YEAR REVOLVING CREDIT AGREEMENT

dated as of

April 11, 2007

among

PIONEER NATURAL RESOURCES COMPANY,

as the Borrower

JPMORGAN CHASE BANK, N.A.

as Administrative Agent

JPMORGAN CHASE BANK, N.A.,

WACHOVIA BANK, NATIONAL ASSOCIATION and

BANK OF AMERICA, N.A.,

as Issuing Banks,

JPMORGAN CHASE BANK, N.A. and

WACHOVIA BANK, NATIONAL ASSOCIATION

as Swingline Banks

and

The Lenders Party Hereto

____________________________

WACHOVIA BANK, NATIONAL ASSOCIATION,

as Syndication Agent

BANK OF AMERICA, N.A., DEUTSCHE BANK SECURITIES INC. and WELLS FARGO BANK, NATIONAL ASSOCIATION,

as Co-Documentation Agents

J.P. MORGAN SECURITIES INC. and WACHOVIA CAPITAL MARKETS, LLC,

as Co-Arrangers and Joint Bookrunners

TABLE OF CONTENTS

AMENDED AND RESTATED 5 -YEAR REVOLVING CREDIT AGREEMENT

AMENDED AND RESTATED 5 -YEAR REVOLVING CREDIT AGREEMENT

Schedules :

Exhibits :

AMENDED AND RESTATED 5 -YEAR REVOLVING CREDIT AGREEMENT

• • AMENDED AND RESTATED 5 -YEAR REVOLVING CREDIT AGREEMENT dated as of April 11, 2007, among PIONEER NATURAL RESOURCES COMPANY , a Delaware corporation, as the Borrower, JPMORGAN CHASE BANK , N.A. as Administrative Agent, JPMorgan Chase Bank, N.A., Wachovia Bank, National Association and Bank of America, N.A., as Issuing Banks, JPMORGAN CHASE BANK, N.A., and WACHOVIA BANK, NATIONAL ASSOCIATION, as Swingline Lenders, the LENDERS party hereto, WACHOVIA BANK, NATIONAL ASSOCIATION, as Syndication Agent, BANK OF AMERICA, N.A., DEUTSCHE BANK SECURITIES INC. and WELLS FARGO BANK, NATIONAL ASSOCIATION , as Co-Documentation Agents, and J.P. MORGAN SECURITIES INC. and WACHOVIA CAPITAL MARKETS, LLC , as Co-Arrangers and Joint Bookrunners.

The parties hereto agree as follows:

ARTICLE I

DEFINITIONS

Section 1.01 Defined Terms . As used in this Agreement, the following terms have the meanings specified below:

" ABR ", when used in reference to any Loan or Borrowing, refers to whether such Loan, or Loans comprising such Borrowing, are bearing interest at a rate determined by reference to the Alternate Base Rate.

" Adjusted LIBO Rate " means, with respect to any Eurodollar Borrowing for any Interest Period, an interest rate per annum (rounded upwards, if necessary, to the next 1/16 of 1%) equal to (a) the LIBO Rate for such Interest Period multiplied by (b) the Statutory Reserve Rate.

" Administrative Agent " means JPMorgan Chase Bank, N.A. in its capacity as administrative agent for the Lenders hereunder.

" Administrative Questionnaire " means an Administrative Questionnaire in a form supplied by the Administrative Agent.

" Affiliate " means, with respect to a specified Person, another Person that directly, or indirectly through one or more intermediaries, Controls or is Controlled by or is under common Control with the Person specified.

" Agreement " means this Amended and Restated 5-Year Revolving Credit Agreement, as the same may be amended, modified, restated, or replaced from time to time.

" Alternate Base Rate " means, for any day, a rate per annum equal to the greater of (a) the Prime Rate in effect on such day and (b) the Federal Funds Effective Rate in effect on such day plus 1/2 of 1%. Any change in the Alternate Base Rate due to a change in the Prime Rate or the Federal Funds Effective Rate shall be effective from and including the effective date of such change in the Prime Rate or the Federal Funds Effective Rate, respectively.

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" Applicable Margin " means, for any day, with respect to any Eurodollar Loan, or with respect to the commitment fees payable hereunder, as the case may be, the Applicable Margin per annum set forth below under the caption "Eurodollar Spread" or "Commitment Fee Rate", as the case may be, based upon the ratings by Moody’s and S&P, respectively, applicable on such date to the Index Debt:

On each day that the sum of the total Credit Exposures exceed 50% of the total Commitments, the Eurodollar Spread shall be 0.050% higher in the case of Category 1 and shall be 0.100% higher in the case of Category 2. Applicable Margin for ABR Loans is zero percent (0%).

For purposes of the foregoing, if both Moody’s and S&P shall not have in effect a rating for the Index Debt (other than by reason of the circumstances referred to in the last sentence of this definition), then such agencies shall be deemed to have established a rating in Category 4. If the ratings established or deemed to have been established by Moody’s and S&P for the Index Debt shall fall within different Categories, the Applicable Margin shall be based on the higher of the two ratings, unless one of the two ratings is two or more Categories lower than the other, in which case the Applicable Margin shall be determined by reference to the Category next above that of the lower of the two ratings; provided , however , that if only one of Moody’s or S&P shall have established a rating, then the Applicable Margin shall be determined by reference to such available rating. If the ratings established or deemed to have been established by Moody’s and S&P for the Index Debt shall be changed (other than as a result of a change in the rating system of Moody’s or S&P), such change shall be effective as of the date on which it is first announced by the applicable rating agency, irrespective of when notice of such change shall have been furnished by the Borrower to the Agent and the Lenders pursuant to Section 5.01 or otherwise. Each change in the Applicable Margin shall apply during the period commencing on the effective date of such change and ending on the date immediately preceding the effective date of the next such change. If the rating system of Moody’s or S&P shall change, or if either such rating agency shall cease to be in the business of rating corporate debt obligations, the Borrower and the Lenders shall negotiate in good faith to amend this definition to reflect such changed rating system or the unavailability of ratings from such rating agency and, pending the

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effectiveness of any such amendment, the Applicable Margin shall be determined by reference to the rating of such agency most recently in effect prior to such change or cessation.

" Applicable Percentage " means, with respect to any Lender, the percentage of the Commitments represented by such Lender’s Commitment. If the Commitments have terminated or expired, the Applicable Percentages shall be determined based upon the Commitments most recently in effect, giving effect to any assignments.

" Assignment and Assumption " means an assignment and assumption agreement entered into by a Lender and an assignee (with the consent of any party whose consent is required by Section 9.04 ), and accepted by the Administrative Agent, in the form of Exhibit A or any other form approved by the Administrative Agent.

" Availability Period " means the period from and including the Effective Date to but excluding the earlier of the Maturity Date and the date of termination of the Commitments.

" Board " means the Board of Governors of the Federal Reserve System of the United States of America.

" Borrower " means the Pioneer Natural Resources Company, a Delaware corporation.

" Borrowing " means Revolving Loans of the same Type, made, converted or continued on the same date and, in the case of Eurodollar Loans, as to which a single Interest Period is in effect or Swingline Loans, as to which a single Interest Period is in effect.

" Borrowing Request " means a request by the Borrower for a Revolving Borrowing in accordance with Section 2.04 .

" Business Day " means any day that is not a Saturday, Sunday or other day on which commercial banks in New York City or Texas are authorized or required by law to remain closed; provided that, when used in connection with a Eurodollar Loan, the term "Business Day" shall also exclude any day on which banks are not open for dealings in dollar deposits in the London interbank market.

" Capital Lease Obligations " of any Person means the obligations of such Person to pay rent or other amounts under any lease of (or other arrangement conveying the right to use) real or personal property, or a combination thereof, which obligations are required to be classified and accounted for as capital leases on a balance sheet of such Person under GAAP, and the amount of such obligations shall be the capitalized amount thereof determined in accordance with GAAP.

" Certifying Officer " has the meaning set forth in Section 5.01(c) .

" Change in Control " means (a) the acquisition of ownership, directly or indirectly, beneficially or of record, by any Person or group (within the meaning of the Securities Exchange Act of 1934, as amended, and the rules of the Securities and Exchange Commission thereunder

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as in effect on the date hereof), of Equity Interests representing more than 35% of the aggregate ordinary voting power represented by the issued and outstanding Equity Interests of the Borrower; or (b) occupation of a majority of the seats (other than vacant seats) on the board of directors of the Borrower by Persons who were neither (i) nominated by the board of directors of the Borrower nor (ii) appointed by directors so nominated.

" Change in Law " means (a) the adoption of any law, rule or regulation after the date of this Agreement, (b) any change in any law, rule or regulation or in the interpretation or application thereof by any Governmental Authority after the date of this Agreement or (c) compliance by any Lender or the Issuing Banks (or, for purposes of Section 2.15(b) , by any lending office of such Lender or by such Lender’s or the Issuing Banks’ holding companies, if any) with any request, guideline or directive (whether or not having the force of law) of any Governmental Authority made or issued after the date of this Agreement.

" CI Lender " has the meaning set forth in Section 2.02(a) .

" Class ", when used in reference to any Loan or Borrowing, refers to whether such Loan, or the Loans comprising such Borrowing, are Revolving Loans or Swingline Loans.

" Co-Arrangers " means both J.P. Morgan Securities Inc. and Wachovia Capital Markets, LLC.

" Code " means the Internal Revenue Code of 1986, as amended from time to time.

" Commitment " means, with respect to each Lender, the commitment of such Lender to make Revolving Loans and to acquire participations in Letters of Credit and Swingline Loans hereunder, expressed as an amount representing the maximum aggregate amount of such Lender’s Credit Exposure hereunder, as such commitment may be (a) increased from time to time pursuant to Section 2.02 , (b) reduced from time to time pursuant to Section 2.09 , or (c) reduced or increased from time to time pursuant to assignments by or to such Lender pursuant to Section 9.04 . The initial amount of each Lender’s Commitment is set forth on Schedule 2.01 , or in the Assignment and Assumption pursuant to which such Lender shall have assumed its Commitment, as applicable. The initial aggregate amount of the Lenders’ Commitments is $1,500,000,000.

" Commitment Increase " has the meaning set forth in Section 2.02(a) .

" Commitment Increase Effective Date " has the meaning set forth in Section 2.02(b) .

" Consenting Lender " has the meaning assigned to such term in Section 2.20 .

" Consolidated Net Tangible Assets " means, on any date, the aggregate amount of total assets of the Borrower and its Subsidiaries, minus (a) all current liabilities of the Borrower and its Subsidiaries (excluding current liabilities included in the definition of Indebtedness and excluding current liabilities attributable to commodities derivative contracts), (b) all goodwill of the Borrower and its Subsidiaries and (c) current and long-term assets attributable to commodities derivative contracts, all determined on a consolidated basis in accordance with GAAP.

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" Consolidated Tangible Net Worth " means, at any date, (i) the Consolidated shareholders’ equity of Borrower and its Restricted Subsidiaries (determined in accordance with GAAP); less (ii) the amount of Consolidated intangible assets of Borrower and its Restricted Subsidiaries, provided , that to the extent oil and gas mineral leases are classified as intangible assets under GAAP, for purposes of this definition, those assets will be treated as tangible assets; less (iii) the other comprehensive income component of consolidated shareholders’ net equity of Borrower and its Restricted Subsidiaries attributable to deferred hedge gains, net of associated taxes; plus (iv) the aggregate amount of any non-cash write downs under Statements of Financial Accounting Standards Nos. 19, 109, 142, and 144, (and any statements replacing, modifying or superceding such statement), on a Consolidated basis, by Borrower and its Restricted Subsidiaries after December 31, 2006, net of associated taxes; plus (v) the other comprehensive income component of consolidated shareholders’ net equity of Borrower and its Restricted Subsidiaries attributable to deferred hedge losses, net of associated taxes.

" Control " means the possession, directly or indirectly, of the power to direct or cause the direction of the management or policies of a Person, whether through the ability to exercise voting power, by contract or otherwise. "Controlling" and "Controlled" have meanings correlative thereto.

" Credit Exposure " means, with respect to any Lender at any time, the sum of the outstanding principal amount of such Lender’s Loans and its LC Exposure and Swingline Exposure at such time.

" Declining Lender " has the meaning assigned to such term in Section 2.20 .

" Default " means any event or condition which constitutes an Event of Default or which upon notice, lapse of time or both would, unless cured or waived, become an Event of Default.

" Disclosed Matters " means the actions, suits and proceedings and the environmental matters disclosed in Schedule 3.06 , disclosed in any filing with the Securities and Exchange Commission or as otherwise disclosed in writing from time to time to Administrative Agent.

" dollars " or " $ " refers to lawful money of the United States of America.

" Effective Date " means the date on which the conditions specified in Section 4.01 are satisfied (or waived in accordance with Section 9.02 ).

" Environmental Laws " means all laws, rules, regulations, codes, ordinances, orders, decrees, judgments, injunctions, notices or binding agreements issued, promulgated or entered into by any Governmental Authority, relating in any way to the environment, preservation or reclamation of natural resources, the management, release or threatened release of any Hazardous Material.

" Environmental Liability " means any liability, contingent or otherwise (including any liability for damages, costs of environmental remediation, fines, penalties or indemnities), of the Borrower or any Subsidiary directly or indirectly resulting from or based upon (a) violation of any Environmental Law, (b) the generation, use, handling, transportation, storage, treatment or

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disposal of any Hazardous Materials, (c) exposure to any Hazardous Materials, (d) the release or threatened release of any Hazardous Materials into the environment or (e) any contract, agreement or other consensual arrangement pursuant to which liability is assumed or imposed with respect to any of the foregoing.

" Equity Interests " means shares of capital stock, partnership interests, membership interests in a limited liability company, beneficial interests in a trust or other equity ownership interests in a Person, and any warrants, options or other rights entitling the holder thereof to purchase or acquire any such equity interest.

" ERISA " means the Employee Retirement Income Security Act of 1974, as amended from time to time.

" ERISA Affiliate " means any trade or business (whether or not incorporated) that, together with the Borrower, is treated as a single employer under Section 414(b) or (c) of the Code or, solely for purposes of Section 302 of ERISA and Section 412 of the Code, is treated as a single employer under Section 414 of the Code.

" ERISA Event " means (a) any "reportable event", as defined in Section 4043 of ERISA or the regulations issued thereunder with respect to a Plan (other than an event for which the 30-day notice period is waived); (b) the existence with respect to any Plan of an "accumulated funding deficiency" (as defined in Section 412 of the Code or Section 302 of ERISA), whether or not waived; (c) the filing pursuant to Section 412(d) of the Code or Section 303(d) of ERISA of an application for a waiver of the minimum funding standard with respect to any Plan; (d) the incurrence by the Borrower or any of its ERISA Affiliates of any liability under Title IV of ERISA with respect to the termination of any Plan; (e) the receipt by the Borrower or any ERISA Affiliate from the PBGC or a plan administrator of any notice relating to an intention to terminate any Plan or Plans or to appoint a trustee to administer any Plan; (f) the incurrence by the Borrower or any of its ERISA Affiliates of any liability with respect to the withdrawal or partial withdrawal from any Plan or Multiemployer Plan; or (g) the receipt by the Borrower or any ERISA Affiliate of any notice, or the receipt by any Multiemployer Plan from the Borrower or any ERISA Affiliate of any notice, concerning the imposition of Withdrawal Liability or a determination that a Multiemployer Plan is, or is expected to be, insolvent or in reorganization, within the meaning of Title IV of ERISA.

" Eurodollar ", when used in reference to any Loan or Borrowing, refers to whether such Loan, or the Loans comprising such Borrowing, are bearing interest at a rate determined by reference to the Adjusted LIBO Rate.

" Event of Default " has the meaning set forth in Article VII .

" Excluded Taxes " means, with respect to the Administrative Agent, any Lender, the Issuing Banks or any other recipient of any payment to be made by or on account of any obligation of the Borrower hereunder, (a) income or franchise taxes by the United States of America, or by the jurisdiction under the laws of which such recipient is organized or in which its principal office is located or, in the case of any Lender, in which its applicable lending office

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is located, (b) any branch profits taxes imposed by the United States of America or any similar tax imposed by any other jurisdiction in which the Borrower is located and (c) in the case of a Foreign Lender (other than an assignee pursuant to a request by the Borrower under Section 2.19(b) , any withholding tax that is imposed on amounts payable to such Foreign Lender at the time such Foreign Lender becomes a party to this Agreement whether upon execution or upon assignment (or designates a new lending office) or is attributable to such Foreign Lender’s failure to comply with Section 2.17(e) , except to the extent that such Foreign Lender (or its assignor, if any) was entitled, at the time of designation of a new lending office (or assignment), to receive additional amounts from the Borrower with respect to such withholding tax pursuant to Section 2.17(a) .

" Executive Officer " means any Financial Officer, executive vice president, officer ranking above an executive vice president and any officer that is the functional equivalent of the foregoing.

" Existing Credit Agreement " means that certain 5-Year Revolving Credit Agreement, dated as of September 30, 2005, among the Borrower, JPMorgan Chase Bank, N.A., as Administrative Agent, JPMorgan Chase Bank, N.A., Wachovia Bank, National Association and Bank of America, N.A. as Issuing Banks, Wachovia Bank, National Association, as Syndication Agent, Bank of America, N.A., Deutsche Bank Securities Inc. and Wells Fargo Bank, National Association, as Co-Documentation Agents, and the lenders parties thereto.

" Existing Letters of Credit " means the Letters of Credit described on Schedule 1.01 that were issued by JPMorgan Chase Bank, N.A., Wachovia Bank, National Association or Bank of America, N.A. under the Existing Credit Agreement and that shall be transferred to and deemed issued under this Agreement, as such Letters of Credit may be renewed or amended from time to time.

" Existing Maturity Date " has the meaning assigned to such term in Section 2.20 .

" Federal Funds Effective Rate " means, for any day, the weighted average (rounded upwards, if necessary, to the next 1/100 of 1%) of the rates on overnight Federal funds transactions with members of the Federal Reserve System arranged by Federal funds brokers, as published on the next succeeding Business Day by the Federal Reserve Bank of New York, or, if such rate is not so published for any day that is a Business Day, the average (rounded upwards, if necessary, to the next 1/100 of 1%) of the quotations for such day for such transactions received by the Administrative Agent from three Federal funds brokers of recognized standing selected by it.

" Financial Officer " means, with respect to any Person, the chief financial officer or principal accounting officer. The term "Financial Officer" without reference to a Person shall mean a Financial Officer of the Borrower.

" Foreign Lender " means any Lender that is organized under the laws of a jurisdiction other than that in which the Borrower is located. For purposes of this definition, the United States of America, each State thereof and the District of Columbia shall be deemed to constitute a single jurisdiction.

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" GAAP " means generally accepted accounting principles in the United States of America.

" Governmental Authority " means the government of the United States of America, any other nation or any political subdivision thereof, whether state or local, and any agency, authority, instrumentality, regulatory body, court, central bank or other entity exercising executive, legislative, judicial, taxing, regulatory or administrative powers or functions of or pertaining to government.

" Guarantee " of or by any Person (the "guarantor") means any obligation, contingent or otherwise, of the guarantor guaranteeing or having the economic effect of guaranteeing any Indebtedness or other obligation of any other Person (the "primary obligor") in any manner, whether directly or indirectly, and including any obligation of the guarantor, direct or indirect, (a) to purchase or pay (or advance or supply funds for the purchase or payment of) such Indebtedness or other obligation or to purchase (or to advance or supply funds for the purchase of) any security for the payment thereof, (b) to purchase or lease property, securities or services for the purpose of assuring the owner of such Indebtedness or other obligation of the payment thereof, or (c) to maintain working capital, equity capital or any other financial statement condition or liquidity of the primary obligor so as to enable the primary obligor to pay such Indebtedness or other obligation, provided , that the term Guarantee shall not include endorsements for collection or deposit in the ordinary course of business.

" Hazardous Materials " means all explosive or radioactive substances or wastes and all hazardous or toxic substances, wastes or other pollutants, including petroleum or petroleum distillates, asbestos or asbestos containing materials, polychlorinated biphenyls, radon gas, infectious or medical wastes and all other substances or wastes of any nature regulated pursuant to any Environmental Law.

" Highest Lawful Rate " means, with respect to each Lender, the maximum nonusurious interest rate, if any, that at any time or from time to time may be contracted for, taken, reserved charged or received on the Indebtedness under laws applicable to such Lender which are presently in effect or, to the extent allowed by law, under such applicable laws which may hereafter be in effect and which allow a higher maximum nonusurious interest rate than applicable laws allow as of the date hereof.

" Hybrid Equity Credit " means, on any date, with respect to any Hybrid Equity Securities, the aggregate principal amount of such Hybrid Equity Securities that is treated as equity by S&P and Moody’s based on the classifications for such Hybrid Equity Securities issued by S&P and Moody’s; provided that if the classifications for such Hybrid Equity Securities issued by S&P and Moody’s are different, then the higher classification (i.e., the classification that provides for the most equity) will apply to determine the amount of "Hybrid Equity Credit" for such Hybrid Equity Securities.

" Hybrid Equity Securities " means, on any date (the "determination date"), any securities issued by the Borrower or any of the Restricted Subsidiaries or a financing vehicle of the Borrower or any of the Restricted Subsidiaries, other than common stock, that meet the following criteria: (a) (i) the Borrower demonstrates that such securities are classified, at the time

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they are issued, as possessing a minimum of "intermediate equity content" by S&P and "Basket C equity credit" by Moody’s (or the equivalent classifications then in effect by such agencies) and (ii) on such determination date such securities are classified as possessing a minimum of "intermediate equity content" by S&P or "Basket C equity credit" by Moody’s (or the equivalent classifications then in effect by such agencies) and (b) such securities require no repayments or prepayments and no mandatory redemptions or repurchases, in each case, prior to at least 91 days after the later of the termination of the Commitments and the repayment in full of all obligations of the Borrower under this Agreement. As used in this definition, "mandatory redemption" shall not include conversion of a security into common stock.

" Hydrocarbon Interests " means all rights, titles, interests and estates now owned or hereafter acquired in and to oil and gas leases, oil, gas and mineral leases, or other liquid or gaseous hydrocarbon leases, mineral fee or lease interests, farm-outs, overriding royalty and royalty interests, net profit interests, oil payments, production payment interests and similar mineral interests, including any reserved or residual interest of whatever nature.

" Hydrocarbons " means oil, gas, casinghead gas, condensate, distillate, liquid hydrocarbons, gaseous hydrocarbons, all products refined, separated, settled and dehydrated therefrom and all products refined therefrom, including, without limitation, kerosene, liquefied petroleum gas, refined lubricating oils, diesel fuel, drip gasoline, natural gasoline, helium, sulfur and all other minerals.

" Indebtedness " of any Person means, without duplication, (a) all obligations of such Person for borrowed money, (b) all obligations of such Person evidenced by bonds, debentures, notes or similar instruments, (c) all obligations of such Person in respect of the deferred purchase price of property or services (other than customary payment terms taken in the ordinary course of business), (d) all Indebtedness of others secured by (or for which the holder of such Indebtedness has an existing right, contingent or otherwise, to be secured by) any Lien on property owned or acquired by such Person, whether or not the Indebtedness secured thereby has been assumed limited, however to the lesser of (1) the amount of its liability or (2) the book value of such property, (e) all Guarantees by such Person of Indebtedness of others, (f) all Capital Lease Obligations of such Person, (g) all obligations, contingent or otherwise, of such Person as an account party in respect of letters of credit, (h) all obligations, contingent or otherwise, of such Person in respect of bankers’ acceptances, (i) the amount of deferred revenue attributed to any forward sale of production for which such Person has received payment in advance other than on ordinary trade terms, (j) all obligations of such Person in respect of synthetic leases and (k) the undischarged balance of any production payment created by such Person or for the creation of which such Person directly or indirectly received payment. The Indebtedness of any Person shall include the Indebtedness of any other entity (including any partnership in which such Person is a general partner) to the extent such Person is liable therefor as a result of such Person’s ownership interest in or other relationship with such entity, except to the extent the terms of such Indebtedness provide that such Person is not liable therefor.

" Indemnified Taxes " means Taxes other than Excluded Taxes.

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" Index Debt " means senior, unsecured, long-term indebtedness for borrowed money of the Borrower that is not guaranteed by any other Person except for a Subsidiary Guarantor or subject to any other credit enhancement; provided , that if the Borrower does not have any such indebtedness, Index Debt shall be the indebtedness under this Agreement.

" Interest Election Request " means a request by the Borrower to convert or continue a Borrowing in accordance with Section 2.08 .

" Interest Payment Date " means (a) with respect to any ABR Loan, the last day of each March, June, September and December, (b) with respect to any Eurodollar Loan, the last day of the Interest Period applicable to the Borrowing of which such Loan is a part and, in the case of a Eurodollar Borrowing with an Interest Period of more than three months’ duration, each day prior to the last day of such Interest Period that occurs at intervals of three months’ duration after the first day of such Interest Period and (c) with respect to any Swingline Loan, the first day of each calendar month, unless such day shall not be a Business Day, in which case the next succeeding Business Day.

" Interest Period " means (a) with respect to any Eurodollar Revolving Borrowing, the period commencing on the date of such Borrowing and ending on the numerically corresponding day in the calendar month that is one, two, three or six months or, with the consent of the Administrative Agent, nine or twelve months thereafter, as the Borrower may elect, and (b) with respect to any Swingline Loan, the period commencing on the date of such Borrowing and ending on the date specified in Section 2.10(a) ; provided , that (i) if any Interest Period would end on a day other than a Business Day, such Interest Period shall be extended to the next succeeding Business Day unless, in the case of a Eurodollar Revolving Borrowing only, such next succeeding Business Day would fall in the next calendar month, in which case such Interest Period shall end on the next preceding Business Day and (ii) any Interest Period pertaining to a Eurodollar Revolving Borrowing that commences on the last Business Day of a calendar month (or on a day for which there is no numerically corresponding day in the last calendar month of such Interest Period) shall end on the last Business Day of the last calendar month of such Interest Period. For purposes hereof, the date of a Borrowing initially shall be the date on which such Borrowing is made and, in the case of a Revolving Borrowing, thereafter shall be the effective date of the most recent conversion or continuation of such Borrowing.

" Investment Grade Date " means the first date on which the Borrower’s Index Debt rating is BBB- or better by S&P’s or Baa3 or better by Moody’s, unless one of the two ratings is two or more categories lower than the other and the category that is one above the lower rating is not BBB- or better or Baa3 or better.

" Issuing Bank " means each of JPMorgan Chase Bank, N.A. and Wachovia Bank, National Association, in its capacity as the issuer of Letters of Credit hereunder, and its successors in such capacity as provided in Section 2.06(i) . The Issuing Bank may, in its discretion, arrange for one or more Letters of Credit to be issued by Affiliates of the Issuing Bank, in which case the term "Issuing Bank" shall include such Affiliate with respect to Letters of Credit issued by such Affiliate. Bank of America, N.A. shall also be an Issuing Bank as to Existing Letters of Credit. The Borrower may, with the consent of the Administrative Agent and

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the relevant Lender, appoint such Lender hereunder as an Issuing Bank in addition to JPMorgan Chase Bank, N.A. and Wachovia Bank, National Association.

" Joinder Agreement " has the meaning set forth in Section 2.02(a) .

" LC Disbursement " means a payment made by an Issuing Bank pursuant to a Letter of Credit.

" LC Exposure " means, at any time, the sum of (a) the aggregate undrawn amount of all outstanding Letters of Credit at such time plus (b) the aggregate amount of all LC Disbursements that have not yet been reimbursed by or on behalf of the Borrower at such time. The LC Exposure of any Lender at any time shall be its Applicable Percentage of the total LC Exposure at such time.

" Lenders " means the Persons listed on Schedule 2.01 and any other Person that shall have become a party hereto pursuant to Section 2.02 or pursuant to an Assignment and Assumption, other than any such Person that ceases to be a party hereto pursuant to an Assignment and Assumption. Unless the context otherwise requires, the term "Lenders" includes the Swingline Lenders.

" Letter of Credit " means any letter of credit issued pursuant to this Agreement.

" LIBO Rate " means, with respect to any Eurodollar Revolving Borrowing for any Interest Period, the rate appearing on Page 3750 of the Dow Jones Market Service (or on any successor or substitute page of such Service, or any successor to or substitute for such Service, providing rate quotations comparable to those currently provided on such page of such Service, as determined by the Administrative Agent from time to time for purposes of providing quotations of interest rates applicable to dollar deposits in the London interbank market) at approximately 11:00 a.m., London time, two Business Days prior to the commencement of such Interest Period, as the rate for dollar deposits with a maturity comparable to such Interest Period. In the event that such rate is not available at such time for any reason, then the "LIBO Rate" with respect to such Eurodollar Borrowing for such Interest Period shall be the rate at which dollar deposits of $5,000,000 and for a maturity comparable to such Interest Period are offered by the principal London office of the Administrative Agent in immediately available funds in the London interbank market at approximately 11:00 a.m., London time, two Business Days prior to the commencement of such Interest Period.

" Lien " means, with respect to any asset, (a) any mortgage, deed of trust, lien, pledge, hypothecation, or security interest in, on or of such asset, or any other charge or encumbrance on any such asset to secure Indebtedness or liabilities, but excluding any right to netting or setoff (b) the interest of a vendor or a lessor under any conditional sale agreement, capital lease or title retention agreement (or any financing lease having substantially the same economic effect as any of the foregoing) relating to such asset and (c) in the case of securities, any purchase option, call or similar right of a third party with respect to such securities.

" Loan Documents " means this Agreement and the Subsidiary Guaranties.

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AMENDED AND RESTATED 5 -YEAR REVOLVING CREDIT AGREEMENT

" Loans " means the loans made by the Lenders to the Borrower pursuant to this Agreement.

" Material Adverse Effect " means a material adverse effect on (a) the business, assets, operations, or financial condition of the Borrower and the Restricted Subsidiaries taken as a whole, (b) the ability of the Borrower and the Subsidiary Guarantors, if any, to perform their obligations, taken as a whole, under this Agreement and the other Loan Documents or (c) the rights of or benefits available to the Lenders under this Agreement and the other Loan Documents.

" Material Indebtedness " means (a) Indebtedness (other than the Loans and Letters of Credit), or (b) obligations in respect of one or more Swap Agreements, in each case under clause (a) or (b) of any one or more of the Borrower and its Restricted Subsidiaries in an aggregate principal amount exceeding $75,000,000. For purposes of determining Material Indebtedness, the "principal amount" of the obligations of the Borrower or any Restricted Subsidiary in respect of any Swap Agreement at any time shall be the maximum aggregate amount (giving effect to any netting agreements) that the Borrower or such Restricted Subsidiary would be required to pay if such Swap Agreement were terminated at such time.

" Maturity Date " means the later of (a) April 11, 2012 and (b) if maturity is extended pursuant to Section 2.20 , such extended maturity date as determined pursuant to Section 2.20 (it being understood and agreed that any such maturity shall not be deemed extended for any Lender that has not consented to such extension).

" Maturity Date Extension Request " means a request by the Borrower, in the Form of Exhibit F hereto or any other form approved by the Administrative Agent, for the extension of the Maturity Date pursuant to Section 2.20 .

" Moody’s " means Moody’s Investors Service, Inc.

" Multiemployer Plan " means a multiemployer plan as defined in Section 4001(a)(3) of ERISA.

" New Funds Amount " has the meaning set forth in Section 2.02(d) .

" Notice of Commitment Increase " has the meaning set forth in Section 2.02(b) .

" Obligors " means the Borrower and the Subsidiary Guarantors, each an "Obligor".

" Oil and Gas Properties " means Hydrocarbon Interests; the properties now or hereafter pooled or unitized with Hydrocarbon Interests; all presently existing or future unitization, pooling agreements and declarations of pooled units and the units created thereby (including without limitation all units created under orders, regulations and rules of any Governmental Authority having jurisdiction) which may affect all or any portion of the Hydrocarbon Interests; all pipelines, gathering lines, compression facilities, tanks and processing plants; all interests held in royalty trusts whether presently existing or hereafter created; all Hydrocarbons in and under and which may be produced, saved, processed or attributable to the Hydrocarbon Interests, the lands covered thereby and all Hydrocarbons in pipelines, gathering lines, tanks and

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processing plants and all rents, issues, profits, proceeds, products, revenues and other incomes from or attributable to the Hydrocarbon Interests; all tenements, hereditaments, appurtenances and properties in any way appertaining, belonging, affixed or incidental to the Hydrocarbon Interests, and all rights, titles, interests and estates described or referred to above, including any and all real property, now owned or hereafter acquired, used or held for use in connection with the operating, working or development of any of such Hydrocarbon Interests or property and including any and all surface leases, rights-of-way, easements and servitudes together with all additions, substitutions, replacements, accessions and attachments to any and all of the foregoing; all oil, gas and mineral leasehold and fee interests, all overriding royalty interests, mineral interests, royalty interests, net profits interests, net revenue interests, oil payments, production payments, carried interests and any and all other interests in Hydrocarbons; in each case whether now owned or hereafter acquired directly or indirectly.

" Other Taxes " means any and all present or future stamp or documentary taxes or any other excise or property taxes, charges or similar levies arising from any payment made hereunder or from the execution, delivery or enforcement of, or otherwise with respect to, this Agreement.

" Participant " has the meaning set forth in Section 9.04 .

" PBGC " means the Pension Benefit Guaranty Corporation referred to and defined in ERISA and any successor entity performing similar functions.

" Permitted Encumbrances " means:

• • (a) Liens imposed by law for taxes, assessments, or other governmental charges or levies that are not yet delinquent or are being contested in compliance with Section 5.04 ;

• • (b) carriers’, warehousemen’s, mechanics’, materialmen’s, repairmen’s, landlords, vendors, workmen, operators, and other like Liens arising in the ordinary course of business or incident to the exploration, development, operation, processing and maintenance of Hydrocarbons and related facilities and assets and securing obligations that are not overdue by more than 90 days or are being contested in compliance with Section 5.04 ;

• • (c) pledges and deposits made in the ordinary course of business in compliance with workers’ compensation, unemployment insurance, and other social security laws or regulations;

• • (d) deposits to secure the performance of bids, tenders, trade contracts, leases, statutory obligations, surety and appeal bonds, performance bonds, and other obligations of a like nature, in each case in the ordinary course of business;

     

    (e) judgment liens in respect of judgments that do not constitute an Event of Default under clause (k) of Article VII ;

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• • (f) easements, zoning restrictions, rights-of-way, servitudes, permits, conditions, exceptions, reservations, and similar encumbrances on real property imposed by law or arising in the ordinary course of business that do not secure any Indebtedness and do not materially interfere with the ordinary conduct of business of the Borrower or any Restricted Subsidiary;

• • (g) legal or equitable encumbrances deemed to exist by reason of negative pledges such as in Section 6.02 of this Agreement or the existence of any litigation or other legal proceeding and any related lis pendens filing (excluding any attachment prior to judgment, judgment lien or attachment lien in aid of execution on a judgment);

     

    (h) rights of a common owner of any interest in property held by Borrower or any Restricted Subsidiary as a common owner;

     

    (i) farmout, carried working interest, joint operating, unitization, royalty, overriding royalty, sales, area of mutual interest, division order, joint venture, partnership and similar agreements relating to the exploration or development of, or production from, oil and gas properties incurred in the ordinary course of business,

     

    (j) Liens arising pursuant to Section 9.343 of the Texas Uniform Commercial Code or other similar statutory provisions of other states with respect to production purchased from others;

     

    (k) any defects, irregularities, or deficiencies in title to easements, rights-of-way, or other properties which do not in the aggregate have a Material Adverse Effect;

     

    (l) Liens on the stock or other ownership interest of or in any Unrestricted Subsidiary, provided that there is no recourse to the Borrower or any Restricted Subsidiary other than recourse to such stock or other ownership interest and proceeds thereof;

     

    (m) Liens resulting from the deposit of funds or evidences of Indebtedness in trust for the purpose of defeasing Indebtedness of the Borrower or any Restricted Subsidiary;

     

    (n) Liens arising under customary letter of credit reimbursement agreements and customary deposit account agreement, and similar agreements entered into in the ordinary course of business with respect to instruments or money in the possession of the other party thereto in the ordinary course of business; and

     

    (o) Liens in renewal or extension of any of the foregoing permitted Liens, so long as limited to the property or assets encumbered and the amounts of indebtedness secured immediately prior to such renewal or extension is not increased.

" Person " means any natural person, corporation, limited liability company, trust, joint venture, association, company, partnership, Governmental Authority or other entity.

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" Plan " means any employee pension benefit plan (other than a Multiemployer Plan) subject to the provisions of Title IV of ERISA or Section 412 of the Code or Section 302 of ERISA, and in respect of which the Borrower or any ERISA Affiliate is (or, if such plan were terminated, would under Section 4069 of ERISA be deemed to be) an "employer" as defined in Section 3(5) of ERISA.

" Prime Rate " means the rate of interest per annum publicly announced from time to time by JPMorgan Chase Bank, N.A. as its prime rate in effect at its principal office in New York City; each change in the Prime Rate shall be effective from and including the date such change is publicly announced as being effective.

" Proved Reserves " means the estimated quantities of crude oil, condensate, natural gas and natural gas liquids that adequate geological and engineering data demonstrate with reasonable certainty to be recoverable in future years from proved reservoirs under existing economic and operating conditions (i.e., prices and costs as of the date the estimate is made).

" PV " means the calculation of the net present value of projected future cash flows from Proved Reserves based upon the most recently delivered Reserve Report (using the arithmetical average of the discount rate and customary price deck of JPMorgan Chase Bank, N.A. and Wachovia Bank, National Association as of the December 31 effective date of such Reserve Report and giving effect to the Borrower’s hedging arrangements and long-term contracts). For purposes of calculating the PV, a maximum of 35% of the PV value will be included from Proved Reserves that are not proved developed producing reserves. If, during any period between the December 31 effective dates of Reserve Reports, the aggregate fair market value, in the reasonable opinion of the Borrower, of Oil and Gas Properties disposed of or purchased by the Borrower and the Restricted Subsidiaries shall exceed $100,000,000, then the PV for such period shall be reduced or increased, as the case may be, from time to time, by an amount equal to the value assigned such Oil and Gas Properties in the most recent calculation of the PV for such period (or if no value was assigned, by an amount agreed to by the Borrower, JPMorgan Chase Bank, N.A. and Wachovia Bank, National Association). PV shall reflect the deferred revenue with respect to production payments included in Total Debt, at a value that is equal to the amount of deferred revenues so included in Total Debt.

" Reducing Percentage Lender " has the meaning set forth in Section 2.02(d) .

" Reduction Amount " has the meaning set forth in Section 2.02(d) .

" Register " has the meaning set forth in Section 9.04 .

" Related Parties " means, with respect to any specified Person, such Person’s Affiliates and the respective directors, officers, employees, agents and advisors of such Person and such Person’s Affiliates.

" Required Lenders " means, at any time, Lenders having Credit Exposures and unused Commitments representing greater than 50% of the sum of the total Credit Exposures and unused Commitments at such time.

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AMENDED AND RESTATED 5 -YEAR REVOLVING CREDIT AGREEMENT

" Reserve Report " means a report prepared as of December 31 of each year by the Borrower with respect to the Oil and Gas Properties of the Borrower and the Restricted Subsidiaries and audited at least as to 60% of the net present value of all such Proved Reserves by Gaffney, Cline & Associates, Ryder Scott Company, Netherland, Sewell & Associates, Inc. or another independent engineering firm selected by the Borrower and reasonably acceptable to the Administrative Agent.

" Restricted Subsidiaries " means all Subsidiary Guarantors and, without duplication, all Subsidiaries of the Borrower that are not Unrestricted Subsidiaries.

" Revolving Loan " means a Loan made pursuant to Section 2.03 .

" S&P " means Standard & Poor’s.

" Statutory Reserve Rate " means a fraction (expressed as a decimal), the numerator of which is the number one and the denominator of which is the number one minus the aggregate of the maximum reserve percentages (including any marginal, special, emergency or supplemental reserves) expressed as a decimal established by the Board to which the Administrative Agent is subject with respect to the Adjusted LIBO Rate, for eurocurrency funding (currently referred to as "Eurocurrency Liabilities" in Regulation D of the Board). Such reserve percentages shall include those imposed pursuant to such Regulation D. Eurodollar Loans shall be deemed to constitute eurocurrency funding and to be subject to such reserve requirements without benefit of or credit for proration, exemptions or offsets that may be available from time to time to any Lender under such Regulation D or any comparable regulation. The Statutory Reserve Rate shall be adjusted automatically on and as of the effective date of any change in any reserve percentage.

" subsidiary " means, with respect to any Person (the " parent ") at any date, any corporation, limited liability company, partnership, association or other entity the accounts of which would be consolidated with those of the parent in the parent’s consolidated financial statements if such financial statements were prepared in accordance with GAAP as of such date, as well as any other corporation, limited liability company, partnership, association or other entity of which securities or other ownership interests representing more than 50% of the ordinary voting power or, in the case of a partnership, more than 50% of the general partnership interests are, as of such date, owned, controlled or held by the parent and one or more subsidiaries of the parent.

" Subsidiary " means any subsidiary of the Borrower.

" Subsidiary Guarantor " means any Restricted Subsidiary that is required to execute and deliver a Subsidiary Guaranty.

" Subsidiary Guarant y" means a Subsidiary Guaranty substantially in the form of Exhibit D executed by a Restricted Subsidiary

" Swap Agreement " means any agreement with respect to any swap, forward, future or derivative transaction or option or similar agreement involving, or settled by reference to, one or

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more rates, currencies, commodities, equity or debt instruments or securities, or economic, financial or pricing indices or measures of economic, financial or pricing risk or value or any similar transaction or any combination of these transactions; provided that no phantom stock or similar plan providing for payments only on account of services provided by current or former directors, officers, employees or consultants of the Borrower or the Subsidiaries shall be a Swap Agreement.

" Swingline Commitment " means, with respect to each Swingline Lender, the commitment of such Swingline Lender to make Swingline Loans. The amount of each Swingline Commitment for each Swingline Lender is $75,000,000 and the total Swingline Commitment is $150,000,000.

" Swingline Exposure " means at any time, the aggregate principal amount of all Swingline Loans outstanding at such time. The Swingline Exposure of any Lender at any time shall be its Applicable Percentage of the total Swingline Exposure at such time.

" Swingline Lenders " means JPMorgan Chase Bank, N.A. and Wachovia Bank, National Association.

" Swingline Loan " means a Loan made pursuant to Section 2.05 .

" Taxes " means any and all present or future taxes, levies, imposts, duties, deductions, charges or withholdings imposed by any Governmental Authority.

" Total Adjusted Debt " means as of any date of determination, all Indebtedness (without duplication) of the Borrower and the Restricted Subsidiaries on a consolidated basis (including any Indebtedness proposed to be incurred on such date of determination and excluding all Indebtedness to be paid on such date of determination with the proceeds thereof).

" Total Cap " means, as of any date of determination, the sum of Total Debt plus Consolidated Tangible Net Worth of the Borrower and the Restricted Subsidiaries.

" Total Debt " means as of any date of determination, all Indebtedness (without duplication) of the Borrower and the Restricted Subsidiaries on a consolidated basis (including any Indebtedness proposed to be incurred on such date of determination and excluding (i) all Indebtedness to be paid on such date of determination with the proceeds thereof, (ii) excluding any Indebtedness described in clause (g) of the definition of Indebtedness herein and (iii) excluding the aggregate amount of Hybrid Equity Credit for Hybrid Equity Securities existing on such date of determination).

" Transactions " means the execution, delivery and performance by the Borrower of this Agreement, the borrowing of Loans, the use of the proceeds thereof, and the issuance of Letters of Credit hereunder and the guarantee by the Subsidiary Guarantors of the obligations of the Borrower under this Agreement.

" Type ", when used in reference to any Loan or Borrowing, refers to whether the rate of interest on such Loan, or on the Loans comprising such Borrowing, is determined by reference to the Adjusted LIBO Rate or the Alternate Base Rate.

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AMENDED AND RESTATED 5 -YEAR REVOLVING CREDIT AGREEMENT

" Unrestricted Subsidiary " means:

(1) any Subsidiary of the Borrower that at the time of determination shall be designated an Unrestricted Subsidiary by a Financial Officer of the Borrower in the manner provided below; and

(2) any Subsidiary of an Unrestricted Subsidiary. A Financial Officer may designate any Subsidiary of the Borrower (including any newly acquired or newly formed Subsidiary of the Borrower and a Restricted Subsidiary but excluding any Subsidiary Guarantor) to be an Unrestricted Subsidiary unless such Subsidiary or any of its Subsidiaries owns any Equity Interests or Indebtedness of, or owns or holds any Lien on any property of, the Borrower or any other Subsidiary of the Borrower that is not a Subsidiary of the Subsidiary to be so designated. A Financial Officer may designate any Unrestricted Subsidiary to be a Restricted Subsidiary; provided , however , that (i) giving effect to such designation shall not result in the occurrence and continuance of a Default and (ii) any Indebtedness of such Subsidiary shall not be secured by Liens at the time of such designation except for Liens permitted by Section 6.02 . Any such designation by a Financial Officer shall be evidenced to the Administrative Agent by promptly filing with the Administrative Agent a copy of the resolution of a Financial Officer giving effect to such designation and an Officers’ Certificate certifying that such designation complied with the foregoing provisions.

" Withdrawal Liability " means liability to a Multiemployer Plan as a result of a complete or partial withdrawal from such Multiemployer Plan, as such terms are defined in Part I of Subtitle E of Title IV of ERISA.

Section 1.02 Classification of Loans and Borrowings. For purposes of this Agreement, Loans may be classified and referred to by Class (e.g., a " Revolving Loan ") or by Type (e.g., a " Eurodollar Loan ") or by Class and Type (e.g., a " Eurodollar Revolving Loan "). Borrowings also may be classified and referred to by Class (e.g., a " Revolving Borrowing ") or by Type (e.g., a " Eurodollar Borrowing ") or by Class and Type (e.g., a " Eurodollar Revolving Borrowing ").

Section 1.03 Terms Generally . The definitions of terms herein shall apply equally to the singular and plural forms of the terms defined. Whenever the context may require, any pronoun shall include the corresponding masculine, feminine and neuter forms. The words "include", "includes" and "including" shall be deemed to be followed by the phrase "without limitation". The word "will" shall be construed to have the same meaning and effect as the word "shall". Unless the context requires otherwise i) any definition of or reference to any agreement, instrument or other document herein shall be construed as referring to such agreement, instrument or other document as from time to time amended, supplemented or otherwise modified (subject to any restrictions on such amendments, supplements or modifications set forth herein), ii) any reference herein to any Person shall be construed to include such Person’s successors and assigns, iii) the words "herein", "hereof" and "hereunder", and words of similar import, shall be construed to refer to this Agreement in its entirety and not to any particular provision hereof, iv) all references herein to Articles, Sections, Exhibits and Schedules shall be construed to refer to Articles and Sections of, and Exhibits and Schedules to, this Agreement and

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AMENDED AND RESTATED 5 -YEAR REVOLVING CREDIT AGREEMENT

v) the words "asset" and "property" shall be construed to have the same meaning and effect and to refer to any and all tangible and intangible assets and properties, including cash, securities, accounts and contract rights.

Section 1.04 Accounting Terms; GAAP . Except as otherwise expressly provided herein, all terms of an accounting or financial nature shall be construed in accordance with GAAP, as in effect from time to time; provided that, if the Borrower notifies the Administrative Agent that the Borrower requests an amendment to any provision hereof to eliminate the effect of any change occurring after the date hereof in GAAP (including but not limited to any Statement of Financial Accounting Standards) or in the application thereof on the operation of such provision (or if the Administrative Agent notifies the Borrower that the Required Lenders request an amendment to any provision hereof for such purpose), regardless of whether any such notice is given before or after such change in GAAP or in the application thereof, then such provision shall be interpreted on the basis of GAAP as in effect and applied immediately before such change shall have become effective until such notice shall have been withdrawn or such provision amended in accordance herewith.

ARTICLE II

THE CREDITS

Section 2.01 Commitments . Subject to the terms and conditions set forth herein, each Lender agrees to make Revolving Loans in dollars to the Borrower from time to time during the Availability Period in an aggregate principal amount that will not result in (1) such Lender’s Credit Exposure exceeding such Lender’s Commitment or (2) the sum of the total Credit Exposures exceeding the total Commitments. Within the foregoing limits and subject to the terms and conditions set forth herein, the Borrower may borrow, prepay and reborrow Revolving Loans.

Section 2.02 Commitment Increase .

(a) Subject to the terms and conditions set forth herein, the Borrower shall have the right, without the consent of the Lenders but with the prior approval of the Administrative Agent, to cause from time to time an increase in the Commitments of the Lenders (a " Commitment Increase ") by adding to this Agreement one or more additional financial institutions that is not already a Lender hereunder and that is reasonably satisfactory to the Administrative Agent or by allowing one or more existing Lenders to increase their respective Commitments (each a " CI Lender "); provided , however that (3) no Event of Default shall have occurred which is continuing, (4) no such Commitment Increase shall cause the Commitments under this Agreement to exceed $2,000,000,000, (5) no Lender’s Commitment shall be increased without such Lender’s prior written consent, (iv) if, on the effective date of such increase, any Loans have been funded, then the Borrower shall be obligated to pay any breakage fees or costs in connection with the reallocation of such outstanding Loans, and (v) each CI Lender shall execute a joinder agreement in the form of Exhibit G attached hereto (a " Joinder Agreement ").

(b) Any Commitment Increase shall be requested by written notice from the Borrower to the Administrative Agent (a " Notice of Commitment Increase ") in the form of Exhibit B attached hereto and shall be approved by the Administrative Agent, such consent to not be unreasonably

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withheld. Each such Notice of Commitment Increase shall specify (6) the proposed effective date of such Commitment Increase, which date shall be no earlier than five (5) Business Days after receipt by the Administrative Agent of such Notice of Commitment Increase, (7) the amount of the requested Commitment Increase ( provided that after giving effect to such requested Commitment Increase, the aggregate amount of the Commitments does not exceed the amount set forth in subsection 1.(ii) above), (8) t he identity of each CI Lender, and (9) the amount of the respective Commitments of the then existing Lenders and the CI Lenders from and after the Commitment Increase Effective Date (as defined below). The Administrative Agent shall review each Notice of Commitment Increase and shall notify the Borrower whether or not the Administrative Agent consents to the proposed Commitment Increase. If the Administrative Agent consents to such Commitment Increase (such consent not to be unreasonably withheld), the Administrative Agent shall execute a counterpart of the Notice of Commitment Increase and such Commitment Increase shall be effective on the proposed effective date set forth in the Notice of Commitment Increase (if the Administrative Agent consented to such Commitment Increase prior to such proposed date) or on another date agreed to by the Administrative Agent and the Borrower (such date referred to as the " Commitment Increase Effective Date ").

(c) On each Commitment Increase Effective Date, to the extent that there are Loans outstanding as of such date, (10) each CI Lender shall, by wire transfer of immediately available funds, deliver to the Administrative Agent such CI Lender’s New Funds Amount, which amount, for each such CI Lender, shall constitute Loans made by such CI Lender to the Borrower pursuant to this Agreement on such Commitment Increase Effective Date, (11) the Administrative Agent shall, by wire transfer of immediately available funds, pay to each then Reducing Percentage Lender its Reduction Amount, which amount, for each such Reducing Percentage Lender, shall constitute a prepayment by the Borrower pursuant to Section 2.11 , ratably in accordance with the respective principal amounts thereof, of the principal amounts of all then outstanding Loans of such Reducing Percentage Lender, and (12) the Borrower shall be responsible to pay to each Lender any breakage fees or costs in connection with the reallocation of any outstanding Loans.

(d) For purposes of this Section 2.02 and Exhibit B , the following defined terms shall have the following meanings: (13) " New Funds Amount " means the amount equal to the product of a CI Lender’s increased Commitment or a CI Lender’s new Commitment (as applicable) represented as a percentage of the aggregate Commitments after giving effect to the Commitment Increase, times the aggregate principal amount of the outstanding Loans immediately prior to giving effect to the Commitment Increase, if any, as of a Commitment Increase Effective Date (without regard to any increase in the aggregate principal amount of Loans as a result of borrowings made after giving effect to the Commitment Increase on such Commitment Increase Effective Date); (14) " Reducing Percentage Lender " means each then existing Lender immediately prior to giving effect to the Commitment Increase that does not increase its respective Commitment as a result of the Commitment Increase and whose relative percentage of the Commitments shall be reduced after giving effect to such Commitment Increase; and (15) " Reduction Amount " means the amount by which a Reducing Percentage Lender’s outstanding Loans decrease as of a Commitment Increase Effective Date (without regard to the effect of any borrowings made on such Commitment Increase Effective Date after giving effect to the Commitment Increase).

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AMENDED AND RESTATED 5 -YEAR REVOLVING CREDIT AGREEMENT

(e) Each Commitment Increase shall become effective on its Commitment Increase Effective Date and upon such effectiveness (16) the Administrative Agent shall record in the register each then CI Lender’s information as provided in the Notice of Commitment Increase and pursuant to an Administrative Questionnaire satisfactory to the Administrative Agent that shall be executed and delivered by each CI Lender to the Administrative Agent on or before the Commitment Increase Effective Date, (17) Schedule 2.01 hereof shall be amended and restated to set forth all Lenders (including any CI Lenders) that will be Lenders hereunder after giving effect to such Commitment Increase (which shall be set forth in Annex I to the applicable Notice of Commitment Increase) and the Administrative Agent shall distribute to each Lender (including each CI Lender) a copy of such amended and restated Schedule 2.01 , and (18) each CI Lender identified on the Notice of Commitment Increase for such Commitment Increase shall be a "Lender" for all purposes under this Agreement.

Section 2.03 Revolving Loans and Borrowings .

(a) Each Revolving Loan shall be made as part of a Borrowing consisting of Revolving Loans made by the Lenders ratably in accordance with their respective Commitments. The failure of any Lender to make any Loan required to be made by it shall not relieve any other Lender of its obligations hereunder; provided that the Commitments of the Lenders are several and no Lender shall be responsible for any other Lender’s failure to make Loans as required.

(b) Subject to Section 2.14 , each Revolving Borrowing shall be comprised entirely of ABR Loans or Eurodollar Loans as the Borrower may request in accordance herewith. Each Lender at its option (but subject to Section 2.19 ) may make any Eurodollar Loan by causing any domestic or foreign branch or Affiliate of such Lender to make such Loan; provided that any exercise of such option shall not affect the obligation of the Borrower to repay such Loan in accordance with the terms of this Agreement.

(c) At the commencement of each Interest Period for any Eurodollar Revolving Borrowing, such Borrowing shall be in an aggregate amount that is an integral multiple of $1,000,000 and not less than $5,000,000. At the time that each ABR Revolving Borrowing is made, such Borrowing shall be in an aggregate amount that is an integral multiple of $1,000,000 and not less than $5,000,000; provided that an ABR Revolving Borrowing may be in an aggregate amount that is equal to the entire unused balance of the total Commitments or that is required to finance the reimbursement of an LC Disbursement as contemplated by Section 2.06(e) . Borrowings of more than one Type and Class may be outstanding at the same time; provided that there shall not at any time be more than a total of fifteen (15) Eurodollar Revolving Borrowings outstanding.

(d) Notwithstanding any other provision of this Agreement, the Borrower shall not be entitled to request, or to elect to convert or continue, any Revolving Borrowing if the Interest Period requested with respect thereto would end after the Maturity Date.

Section 2.04 Requests for Revolving Borrowings . To request a Revolving Borrowing, the Borrower shall notify the Administrative Agent of such request by telephone vi) in the case of a Eurodollar Borrowing, not later than 12:00 noon, New York City time, three Business Days before the date of the proposed Borrowing and vii) in the case of an ABR Borrowing, not later

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than 12:00 noon, New York City time, on the same Business Day of the proposed Borrowing; provided that any such notice of an ABR Borrowing to finance the reimbursement of an LC Disbursement as contemplated by Section 2.06(e) may be given not later than 12:00 noon, New York City time, on the date of the proposed Borrowing. Each such telephonic Borrowing Request shall be irrevocable and shall be confirmed promptly by hand delivery or telecopy to the Administrative Agent of a written Borrowing Request in a form approved by the Administrative Agent and signed by the Borrower. Each such telephonic and written Borrowing Request shall specify the following information in compliance with Section 2.02 :

• • (i) the aggregate amount of the requested Borrowing;

    (ii) the date of such Borrowing, which shall be a Business Day;

(iii) whether such Borrowing is to be an ABR Borrowing or a Eurodollar Borrowing;

(iv) in the case of a Eurodollar Borrowing, the initial Interest Period to be applicable thereto, which shall be a period contemplated by the definition of the term "Interest Period"; and

(v) the location and number of the Borrower’s account to which funds are to be disbursed, which shall comply with the requirements of Section 2.07 .

If no election as to the Type of Revolving Borrowing is specified, then the requested Borrowing shall be an ABR Borrowing. If no Interest Period is specified with respect to any requested Eurodollar Revolving Borrowing, then the Borrower shall be deemed to have selected an Interest Period of one month’s duration. Promptly following receipt of a Borrowing Request in accordance with this Section, the Administrative Agent shall advise each Lender of the details thereof and of the amount of such Lender’s Loan to be made as part of the requested Borrowing.

Section 2.05 Swingline Loans .

(a) Subject to the terms and conditions set forth herein, the Swingline Lenders agree to make Swingline Loans in dollars to the Borrower from time to time during the Availability Period ratably in accordance with its respective Swingline Commitment, in an aggregate principal amount at any time outstanding that will not result in (i) the aggregate principal amount of outstanding Swingline Loans exceeding for the Swingline Lender $75,000,000 or for both Swingline Lenders $150,000,000 or (ii) the total Credit Exposures exceeding the total Commitments; provided that the Swingline Lenders shall not be required to make a Swingline Loan to refinance an outstanding Swingline Loan. Within the foregoing limits and subject to the terms and conditions set forth herein, the Borrower may borrow, prepay and reborrow Swingline Loans. The failure of any Swingline Lender to make any Swingline Loan required to be made by it shall not relieve any other Swingline Lender of its obligations hereunder; provided that the Swingline Commitments of the Swingline Lenders are several and no Swingline Lender shall be responsible for any other Swingline Lender’s failure to make Loans as required. Each Swingline Loan shall be in an amount that is an integral multiple of $1,000,000 and not less than $5,000,000; provided , that a Swingline Loan may be in an aggregate amount that is equal to the

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entire available balance of the total Swingline Commitments or that is required to finance the reimbursement of an LC Disbursement as contemplated by Section 2.06(c) .

(b) To request a Swingline Loan, the Borrower shall notify the Administrative Agent of such request by telephone (confirmed by telecopy), not later than 1:00 p.m., New York City time, on the day of a proposed Swingline Loan. Each such notice shall be irrevocable and shall specify the requested date (which shall be a Business Day) and amount of the requested Swingline Loan. The Administrative Agent will promptly advise each Swingline Lender of any such notice received from the Borrower. Each Swingline Lender shall make its pro rata share of each Swingline Loan available to the Administrative Agent who will in turn make such amount received available to the Borrower by means of a credit to the general deposit account of the Borrower with the Administrative Agent (or, in the case of a Swingline Loan made to finance the reimbursement of an LC Disbursement as provided in Section 2.06(e) , by remittance to the Issuing Bank) by 3:00 p.m., New York City time, on the requested date of such Swingline Loan.

(c) The Swingline Lenders may by written notice given to the Administrative Agent not later than 10:00 a.m., New York City time, on any Business Day require the Lenders to acquire participations on such Business Day in all or a portion of the Swingline Loans outstanding. Such notice shall specify the aggregate amount of Swingline Loans in which Lenders will participate. Promptly upon receipt of such notice, the Administrative Agent will give notice thereof to each Lender, specifying in such notice such Lender’s Applicable Percentage of such Swingline Loan or Loans. Each Lender hereby absolutely and unconditionally agrees, upon receipt of notice as provided above, to pay to the Administrative Agent, for the account of each Swingline Lender, such Lender’s Applicable Percentage of such Swingline Loan or Loans. Each Lender acknowledges and agrees that its obligation to acquire participations in Swingline Loans pursuant to this Section 2.05(c) is absolute and unconditional and shall not be affected by any circumstance whatsoever, including the occurrence and continuance of a Default or reduction or termination of the Commitments, and that each such payment shall be made without any offset, abatement, withholding or reduction whatsoever. Each Lender shall comply with its obligation under this Section 2.05(c) by wire transfer of immediately available funds, in the same manner as provided in Section 2.07 with respect to Loans made by such Lender (and Section 2.07 shall apply, mutatis mutandis , to the payment obligations of the Lenders), and the Administrative Agent shall promptly pay to the Swingline Lenders the amounts so received by it from the Lenders. The Administrative Agent shall notify the Borrower of any participations in any Swingline Loan acquired pursuant to this Section 2.05(c) , and thereafter payments in respect of such Swingline Loan shall be made to the Administrative Agent and not to the Swingline Lenders. Any amounts received by a Swingline Lender from the Borrower (or other party on behalf of the Borrower) in respect of a Swingline Loan after receipt by such Swingline Lender of the proceeds of a sale of participations therein shall be promptly remitted to the Administrative Agent; any such amounts received by the Administrative Agent shall be promptly remitted by the Administrative Agent to the Lenders that shall have made their payments pursuant to this Section 2.05(c) and to such Swingline Lender, as their interests may appear; provided that any such payment so remitted shall be repaid to such Swingline Lender or to the Administrative Agent, as applicable, if and to the extent such payment is required to be refunded to the Borrower for any reason. The purchase of participations in a Swingline Loan pursuant to this Section 2.05(c) shall not relieve the Borrower of any default in the payment thereof.

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(a) General . The Borrower, the Administrative Agent, Bank of America, N.A., as the Issuing Bank, and Lenders hereby agree that all Existing Letters of Credit shall be deemed to be issued under this Agreement as of the Effective Date and shall constitute Letters of Credit hereunder for all purposes (except that the Issuing Bank's standard issuance fee shall not be payable on such deemed issuance). Except as provided in Section 2.06(i) , Bank of America, N.A. shall only serve as Issuing Bank for the Existing Letters of Credit, and JPMorgan Chase Bank, N.A. and Wachovia Bank, National Association shall serve as Issuing Bank for all other Letters of Credit. Subject to the terms and conditions set forth herein, the Borrower may request the issuance of standby Letters of Credit, in dollars and in a form reasonably acceptable to the Administrative Agent and the applicable Issuing Bank, at any time and from time to time during the Availability Period. In the event of any inconsistency between the terms and conditions of this Agreement and the terms and conditions of any form of letter of credit application or other agreement submitted by the Borrower to, or entered into by the Borrower with, the applicable Issuing Bank relating to any Letter of Credit, the terms and conditions of this Agreement shall control.

(b) Notice of Issuance, Amendment, Renewal, Extension; Certain Condition . To request the issuance of a Letter of Credit (or the amendment, renewal or extension of an outstanding Letter of Credit), the Borrower shall hand deliver or telecopy (or transmit by electronic communication, if arrangements for doing so have been approved by the applicable Issuing Bank) to the applicable Issuing Bank and the Administrative Agent (reasonably in advance of the requested date of issuance, amendment, renewal or extension) a notice requesting the issuance of a Letter of Credit, or identifying the Letter of Credit to be amended, renewed or extended, and specifying the date of issuance, amendment, renewal or extension (which shall be a Business Day), the date on which such Letter of Credit is to expire (which shall comply with paragraph (c) below), the amount of such Letter of Credit, the name and address of the beneficiary thereof and such other information as shall be necessary to prepare, amend, renew or extend such Letter of Credit. If requested by an Issuing Bank, the Borrower also shall submit a letter of credit application on such Issuing Bank’s standard form in connection with any request for a Letter of Credit; provided that no provision in such application shall be deemed effective to the extent such provision contains, provides for, or requires, representations, warranties, covenants, security interests, Liens, indemnities, reimbursements of costs or expenses, events of defaults, remedies, or standards of care or to the extent such provision conflicts or is inconsistent with this Agreement. A Letter of Credit shall be issued, amended, renewed or extended only if (and upon issuance, amendment, renewal or extension of each Letter of Credit the Borrower shall be deemed to represent and warrant that), after giving effect to such issuance, amendment, renewal or extension (i) the total Credit Exposures shall not exceed the total Commitments and (ii) the LC Exposure of such Issuing Bank shall not exceed in the aggregate $250,000,000 at any time.

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(c) Expiration Date . Each Letter of Credit shall expire at or prior to the close of business on the earlier of (1) the date one year after the date of the issuance of such Letter of Credit (or, in the case of any renewal or extension thereof, one year after such renewal or extension) and (2) the date that is five Business Days prior to the Maturity Date; provided that no Letter of Credit may expire after the date that is five Business Days prior to an Existing Maturity Date in respect of any Declining Lenders under Section 2.20 if, after giving effect to such Letter of Credit, the aggregate Commitments of the Consenting Lenders (including any replacement Lenders) for the period following such Existing Maturity Date would be less than the LC Exposure following such Existing Maturity Date.

(d) Participation . By the issuance of a Letter of Credit (or an amendment to a Letter of Credit increasing the amount thereof) and without any further action on the part of the Issuing Banks or the Lenders, the Issuing Banks hereby grant to each Lender, and each Lender hereby acquires from the Issuing Banks, a participation in such Letter of Credit equal to such Lender’s Applicable Percentage of the aggregate amount available to be drawn under such Letter of Credit. In consideration and in furtherance of the foregoing, each Lender hereby absolutely and unconditionally agrees to pay to the Administrative Agent, for the account of the Issuing Banks, such Lender’s Applicable Percentage of each LC Disbursement made by the Issuing Banks and not reimbursed by the Borrower on the date due as provided in paragraph (e) below, or of any reimbursement payment required to be refunded to the Borrower for any reason. Each Lender acknowledges and agrees that its obligation to acquire participations pursuant to this paragraph in respect of Letters of Credit is absolute and unconditional and shall not be affected by any circumstance whatsoever, including any amendment, renewal or extension of any Letter of Credit or the occurrence and continuance of a Default or reduction or termination of the Commitments, and that each such payment shall be made without any offset, abatement, withholding or reduction whatsoever.

(e) Reimbursement . If an Issuing Bank shall make any LC Disbursement in respect of a Letter of Credit, the Borrower shall reimburse such LC Disbursement by paying to the Administrative Agent an amount equal to such LC Disbursement not later than 1:00 p.m., New York City time, on the date that such LC Disbursement is made, if the Borrower shall have received notice of such LC Disbursement prior to 10:00 a.m., New York City time, on such date, or, if such notice has not been received by the Borrower prior to such time on such date, then not later than 12:00 noon, New York City time, on (3) the Business Day that the Borrower receives such notice, if such notice is received prior to 10:00 a.m., New York City time, on the day of receipt, or (4) the Business Day immediately following the day that the Borrower receives such notice, if such notice is not received prior to such time on the day of receipt; provided that, if such LC Disbursement is not less than $5,000,000, the Borrower may, subject to the conditions to borrowing set forth herein, request in accordance with Section 2.04 that such payment be financed with an ABR Revolving Borrowing or Swingline Loan in an equivalent amount and, to the extent so financed, the Borrower’s obligation to make such payment shall be discharged and replaced by the resulting ABR Revolving Borrowing or Swingline Loan. If the Borrower fails to make such payment when due, the Administrative Agent shall notify each Lender of the applicable LC Disbursement, the payment then due from the Borrower in respect thereof and such Lender’s Applicable Percentage thereof. Promptly following receipt of such notice, each Lender shall pay to the Administrative Agent its Applicable Percentage of the payment then due from the Borrower, in the same manner as provided in Section 2.07 with respect to Loans made

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by such Lender (and Section 2.07 shall apply, mutatis mutandis , to the payment obligations of the Lenders), and the Administrative Agent shall promptly pay to the Issuing Bank the amounts so received by it from the Lenders. Promptly following receipt by the Administrative Agent of any payment from the Borrower pursuant to this paragraph, the Administrative Agent shall distribute such payment to the Issuing Bank or, to the extent that Lenders have made payments pursuant to this paragraph to reimburse the Issuing Bank, then to such Lenders and the Issuing Bank as its interests may appear. Any payment made by a Lender pursuant to this paragraph to reimburse the Issuing Bank for any LC Disbursement (other than the funding of ABR Revolving Loans or Swingline Loan as contemplated above) shall not constitute a Loan and shall not relieve the Borrower of its obligation to reimburse such LC Disbursement.

(f) Obligations Absolute . The Borrower’s obligation to reimburse LC Disbursements as provided in paragraph (e) above shall be absolute, unconditional and irrevocable, and shall be performed strictly in accordance with the terms of this Agreement under any and all circumstances whatsoever and irrespective of (5) any lack of validity or enforceability of any Letter of Credit or this Agreement, or any term or provision therein, (6) any draft or other document presented under a Letter of Credit proving to be forged, fraudulent or invalid in any respect or any statement therein being untrue or inaccurate in any respect, or (7) any other event or circumstance whatsoever (other than failure to comply with the terms of such Letter of Credit), whether or not similar to any of the foregoing, that might, but for the provisions of this Section, constitute a legal or equitable discharge of, or provide a right of setoff against, the Borrower’s obligations hereunder. Neither the Administrative Agent, the Lenders nor the Issuing Banks, nor any of their Related Parties, shall have any liability or responsibility by reason of or in connection with the issuance or transfer of any Letter of Credit or any payment or failure to make any payment thereunder (irrespective of any of the circumstances referred to in the preceding sentence), or any error, omission, interruption, loss or delay in transmission or delivery of any draft, notice or other communication under or relating to any Letter of Credit (including any document required to make a drawing thereunder), any error in interpretation of technical terms or any consequence arising from causes beyond the control of the Issuing Banks; provided that the foregoing shall not be construed to excuse the Issuing Banks from liability to the Borrower to the extent of any direct damages (as opposed to consequential damages, claims in respect of which are hereby waived by the Borrower to the extent permitted by applicable law) suffered by the Borrower that are caused by the Issuing Banks’ failure to exercise care when determining whether drafts and other documents presented under a Letter of Credit comply with the terms thereof. The parties hereto expressly agree that, in the absence of gross negligence or willful misconduct on the part of the Issuing Banks (as finally determined by a court of competent jurisdiction), the Issuing Banks shall be deemed to have exercised care in each such determination. In furtherance of the foregoing and without limiting the generality thereof, the parties agree that, with respect to documents presented which appear on their face to be in substantial compliance with the terms of a Letter of Credit, the Issuing Banks may, in their sole discretion, either accept and make payment upon such documents without responsibility for further investigation, regardless of any notice or information to the contrary, or refuse to accept and make payment upon such documents if such documents are not in strict compliance with the terms of such Letter of Credit.

(g) Disbursement Procedures . The Issuing Banks shall, promptly following receipt thereof, examine all documents purporting to represent a demand for payment under a Letter of

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Credit. The Issuing Banks shall promptly notify the Administrative Agent and the Borrower by telephone (confirmed by telecopy) of such demand for payment and whether the Issuing Banks have made or will make an LC Disbursement thereunder; provided that any failure to give or delay in giving such notice shall not relieve the Borrower of its obligation to reimburse the Issuing Banks and the Lenders with respect to any such LC Disbursement.

(h) Interim Interest . If an Issuing Bank shall make any LC Disbursement, then, unless the Borrower shall reimburse such LC Disbursement in full on the date such LC Disbursement is made, the unpaid amount thereof shall bear interest, for each day from and including the date such LC Disbursement is made to but excluding the date that the Borrower reimburses such LC Disbursement, at the rate per annum then applicable to ABR Revolving Loans; provided that, if the Borrower fails to reimburse such LC Disbursement when due pursuant to paragraph (e) above, then Section 2.13(d) shall apply. Interest accrued pursuant to this paragraph shall be for the account of the Issuing Bank, except that interest accrued on and after the date of payment by any Lender pursuant to paragraph (e) of this Section to reimburse the Issuing Bank shall be for the account of such Lender to the extent of such payment.

(i) Replacement of the Issuing Banks . An Issuing Bank may be replaced at any time by written agreement among the Borrower, the Administrative Agent, the replaced Issuing Bank and the successor Issuing Bank. The Administrative Agent shall notify the Lenders of any such replacement of an Issuing Bank. At the time any such replacement shall become effective, the Borrower shall pay all unpaid fees accrued for the account of the replaced Issuing Bank pursuant to Section 2.12(b) . From and after the effective date of any such replacement, (8) the successor Issuing Bank shall have all the rights and obligations of the Issuing Bank under this Agreement with respect to Letters of Credit to be issued thereafter and (9) references herein to the term "Issuing Bank" shall be deemed to refer to such successor or to any previous Issuing Bank, or to such successor and all previous Issuing Banks, as the context shall require. After the replacement of an Issuing Bank hereunder, the replaced Issuing Bank shall remain a party hereto and shall continue to have all the rights and obligations of an Issuing Bank under this Agreement with respect to Letters of Credit issued by it prior to such replacement, but shall not be required to issue additional Letters of Credit.

(j) Cash Collateralization . If the Loans have become immediately due and payable pursuant to Article VII , on the Business Day following the Business Day that the Borrower receives notice from the Administrative Agent (at the direction of Required Lenders) or the Required Lenders demanding the deposit of cash collateral pursuant to this paragraph, the Borrower shall deposit in an account with the Administrative Agent, in the name of the Administrative Agent and for the benefit of the Lenders, an amount in cash equal to the LC Exposure as of such date plus any accrued and unpaid interest on LC Disbursements comprising such LC Exposure. Such deposit shall b