EXHIBIT 10.7 EXECUTION COPY SIXTH AMENDMENT SIXTH AMENDMENT, dated as of May 23, 2003 (this "Amendment"), to the Second Amended and Restated Credit Agreement, dated as of May 23, 2000 (as amended, the "Credit Agreement"), among CALPINE CORPORATION, a Delaware corporation (the "Borrower"), the various financial institutions as are or may become parties thereto (the "Lenders") and THE BANK OF NOVA SCOTIA, as administrative agent (in such capacity, the "Agent"). WHEREAS pursuant to the Credit Agreement, the Lenders have made extensions of credit to the Borrower; and WHEREAS the Borrower has requested that a provision of the Credit Agreement be modified in the manner provided for in this Amendment, and the Lenders are willing to agree to such modification as provided for in this Amendment. NOW, THEREFORE, the parties hereto hereby agree as follows: 1. Defined Terms. Capitalized terms used and not defined herein shall have the meanings given to them in the Credit Agreement, as amended hereby. 2. Amendment to Credit Agreement. The definition of "Commitment Termination Date" in Section 1.1 of the Credit Agreement is hereby amended by deleting clause (a) thereof in its entirety and by substituting in lieu thereof the following: "(a) June 16, 2003;". 3. Representations and Warranties. The Borrower hereby represents and warrants to the Agent and the Lenders that, as of the date hereof and after giving effect to the amendment contained herein: (a) No Default or Event of Default has occurred and is continuing. (b) The execution, delivery and performance by the Borrower of this Amendment has been duly authorized by all necessary corporate and other action and does not and will not require any registration with, consent or approval of, notice to or action by, any person in order to be effective and enforceable. Each of this Amendment and the Credit Agreement as amended by this Amendment constitutes the legal, valid and binding obligation of the Borrower, enforceable against each in accordance with its terms, subject to applicable bankruptcy, insolvency, fraudulent conveyance, reorganization, moratorium or other laws affecting creditors' rights generally and subject to general principles of equity, regardless of whether considered in a proceeding in equity or at law. (c) All representations and warranties of each Obligor set forth in the Loan Documents as amended hereby are true and correct in all material respects. 4. Covenants. The Borrower hereby agrees that during the period commencing on the date hereof up to and including June 16, 2003 (the "Extension Period"), the Borrower shall not take any action which could, directly or indirectly, have a material adverse effect upon 2 (i) the financial condition, operations, assets (including power projects), business or prospects of the Borrower and its Subsidiaries taken as a whole; or (ii) the ability of the Borrower or any other Obligor to perform under any Loan Document. Without prejudice to the foregoing, the Borrower shall ensure that, during the Extension Period, (1) no Indebtedness is incurred, created, assumed or suffered to exist by the Borrower or any of its Subsidiaries (except (A) Indebtedness under the Loan Documents and the Loan Documents (as defined in the 2002 Credit Agreement), (B) unsecured Indebtedness incurred in the ordinary course of business, other than Indebtedness of the type described in (1) clauses (a), (c) or (f) of the definition of "Indebtedness" and (2) clauses (b) and (g) of the definition of "Indebtedness" with respect to any Indebtedness described in clause (1) above, (C) other unsecured Indebtedness or Non-Recourse Debt (as defined in the Senior Note Indentures) incurred in the ordinary course of business in connection with Indebtedness existing or contractually committed to be made available as of the date hereof, and (D) Indebtedness outstanding on the date hereof), and no guarantee, collateral or other credit support is provided, and no Lien on the properties of the Borrower or any of its Subsidiaries is created, incurred, assumed or granted, in each case in support of (x) any Indebtedness (other than Indebtedness permitted above) or (y) any obligation relating to any synthetic lease transaction of the Borrower or any Subsidiary of the Borrower; (2) no amendment, modification or supplement is made to any agreement or instrument evidencing any Indebtedness, other than amendments, modifications or supplements entered into in the ordinary course of business in respect of (A) the Credit Agreement or the 2002 Credit Agreement, (B) any agreement or instrument evidencing Non-Recourse Debt (as defined in the Senior Note Indentures) of a Subsidiary of the Borrower, or (C) any agreement or instrument evidencing Indebtedness other than Indebtedness of the type described in (1) clauses (a), (c) or (f) of the definition of "Indebtedness" and (2) clauses (b) and (g) of the definition of "Indebtedness" with respect to any Indebtedness described in clause (1) above (the Indebtedness described in clauses (B) and (C) being collectively referred to as "Excluded Indebtedness"); (3) no optional prepayment is made on, or purchase or optional redemption is executed of, any Indebtedness other than Excluded Indebtedness (including, without limitation, any buy-back or defeasance of any outstanding bonds, puttable convertible bonds or other securities of the Borrower or any of its Subsidiaries), it being understood and agreed that, during the Extension Period, neither the Borrower or any of its Subsidiaries shall obtain or receive any such Indebtedness (or instruments evidencing same) in consideration of the sale or other transfer of any assets or properties thereof; (4) no Investment is made by the Borrower or any of its Subsidiaries in any other Person (except (A) Investments by the Borrower in the ordinary course of business in Subsidiaries the equity in which has been pledged to the Lenders, and each of their respective Subsidiaries, (B) Investments by the Borrower in other Persons pursuant to contractual commitments existing as of the date hereof, and (C) Investments by the Borrower in CES in support of transactions entered into by CES in the ordinary course of CES's business, consistent with historical practices); and (5) all transactions between any one or more of the Borrower and its Affiliates entered into during the Extension Period are on terms that are fair and reasonable and similar to those found in a comparable arm's length transaction with a Person that is not an Affiliate of the Borrower. Notwithstanding the foregoing, it is agreed that (x) the Borrower and its Subsidiaries may effectuate the transactions referred to in Schedule I attached to the letter from the Borrower to the Lenders dated May 20, 2003 and (y) none of the prohibitions contained in this Section 4 shall be applicable insofar as they would otherwise constitute an encumbrance or restriction in violation of Section 3.5 of the Pre-2000 Indentures (as defined in the 2002 Credit Agreement). The provisions of this Section 4 may be amended, 3 modified or waived, if such amendment, modification or waiver is in writing and consented to by the Borrower and Lenders owed or holding at least 51% of the aggregate Revolving Loan Commitments and Commitments under the 2002 Credit Agreement and the Credit Agreement, respectively (it being understood, however, that no such amendment, modification or waiver shall amend, modify or waive the provisions of the Credit Agreement unless such amendment, modification or waiver satisfies the requirements of Section 11.1 of the Credit Agreement). 5. Conditions Precedent to Effectiveness. This Amendment shall become effective as of the date hereof upon (i) the Agent having received counterparts hereof duly executed and delivered by the Borrower and each Lender and (ii) the Second Amendment, dated as of the date hereof, to the 2002 Credit Agreement becoming effective in accordance with its terms. 6. No Other Amendments. Except as expressly amended hereby, the provisions of the Credit Agreement are and shall remain in full force and effect. 7. Expenses. The Borrower agrees to pay or reimburse the Agent for its out-of-pocket expenses in connection with this Amendment, including the reasonable fees, charges and disbursements of counsel to the Agent. 8. Governing Law; Counterparts. (a) This Amendment and the rights and obligations of the parties hereto shall be governed by, and construed and interpreted in accordance with, the laws of the State of New York. (b) This Amendment may be executed by one or more of the parties to this Amendment on any number of separate counterparts, and all of said counterparts taken together shall be deemed to constitute one and the same instrument. This Amendment may be delivered by facsimile transmission of the relevant signature pages hereof. IN WITNESS WHEREOF, the Borrower and the Lenders have caused this Amendment to be duly executed by their respective authorized officers as of the day and year first above written. CALPINE CORPORATION By /s/ ROBERT D. KELLY ----------------------------------------- Name: Robert D. Kelly Title: Chief Financial Officer THE BANK OF NOVA SCOTIA, as Agent and Lender By /s/ DENIS P. O'MEARA ----------------------------------------- Name: Denis P. O'Meara Title: Managing Director Signature page to the Sixth Amendment, dated as of May 23, 2003, to the Second Amended and Restated Credit Agreement, dated as of May 23, 2000, as amended, among Calpine Corporation, the various financial institutions as are or may become parties thereto and The Bank of Nova Scotia, as administrative agent. BAYERISCHE LANDESBANK CAYMAN ISLANDS BRANCH By /s/ OLIVER HILDENBRAND ----------------------------------------- Name: Oliver Hildenbrand Title: First Vice President By /s/ JAMES H. BOYLE ----------------------------------------- Name: James H. Boyle Title: Vice President Signature page to the Sixth Amendment, dated as of May 23, 2003, to the Second Amended and Restated Credit Agreement, dated as of May 23, 2000, as amended, among Calpine Corporation, the various financial institutions as are or may become parties thereto and The Bank of Nova Scotia, as administrative agent. BANK OF AMERICA, NA By /s/ EILEEN C. HIGGINS ----------------------------------------- Name: Eileen C. Higgins Title: Principal Signature page to the Sixth Amendment, dated as of May 23, 2003, to the Second Amended and Restated Credit Agreement, dated as of May 23, 2000, as amended, among Calpine Corporation, the various financial institutions as are or may become parties thereto and The Bank of Nova Scotia, as administrative agent. ING CAPITAL LLC By /s/ ERWIN THOMET ----------------------------------------- Name: Erwin Thomet Title: Managing Director By /s/ NICK BELLAMY ----------------------------------------- Name: Nick Bellamy Title: Director Signature page to the Sixth Amendment, dated as of May 23, 2003, to the Second Amended and Restated Credit Agreement, dated as of May 23, 2000, as amended, among Calpine Corporation, the various financial institutions as are or may become parties thereto and The Bank of Nova Scotia, as administrative agent. CIBC INC. By /s/ M. SANJEEVA SENANAYAKE ----------------------------------------- Name: M. Sanjeeva Senanayake Title: Executive Director CIBC World Markets Corp. As Agent Signature page to the Sixth Amendment, dated as of May 23, 2003, to the Second Amended and Restated Credit Agreement, dated as of May 23, 2000, as amended, among Calpine Corporation, the various financial institutions as are or may become parties thereto and The Bank of Nova Scotia, as administrative agent. DRESDNER BANK AG, NEW YORK and GRAND CAYMAN BRANCHES By /s/ FRED THURSTON ----------------------------------------- Name: Fred Thurston Title: Vice President By /s/ THOMAS R. BRADY ----------------------------------------- Name: Thomas R. Brady Title: Director Signature page to the Sixth Amendment, dated as of May 23, 2003, to the Second Amended and Restated Credit Agreement, dated as of May 23, 2000, as amended, among Calpine Corporation, the various financial institutions as are or may become parties thereto and The Bank of Nova Scotia, as administrative agent. UNION BANK OF CALIFORNIA, N.A. By /s/ BRYAN READ ----------------------------------------- Name: Bryan Read Title: Vice President Signature page to the Sixth Amendment, dated as of May 23, 2003, to the Second Amended and Restated Credit Agreement, dated as of May 23, 2000, as amended, among Calpine Corporation, the various financial institutions as are or may become parties thereto and The Bank of Nova Scotia, as administrative agent. BAYERISCHE HYPO-UND VEREINSBSBANK, AG, NY BRANCH By /s/ PAUL J. COLATRELLA ----------------------------------------- Name: Paul J. Colatrella Title: Director By /s/ ANDREW G. MATHEWS ----------------------------------------- Name: Andrew G. Mathews Title: Managing Director Signature page to the Sixth Amendment, dated as of May 23, 2003, to the Second Amended and Restated Credit Agreement, dated as of May 23, 2000, as amended, among Calpine Corporation, the various financial institutions as are or may become parties thereto and The Bank of Nova Scotia, as administrative agent. FORTIS CAPITAL CORP. By /s/ EDDIE MATTHEWS ----------------------------------------- Name: Eddie Matthews Title: Senior Vice President By /s/ MOHAMMED ALAM ----------------------------------------- Name: Mohammed Alam Title: Vice President Signature page to the Sixth Amendment, dated as of May 23, 2003, to the Second Amended and Restated Credit Agreement, dated as of May 23, 2000, as amended, among Calpine Corporation, the various financial institutions as are or may become parties thereto and The Bank of Nova Scotia, as administrative agent. CREDIT LYONNAIS NEW YORK BRANCH By /s/ MARTIN C. LIVINGSTON ----------------------------------------- Name: Martin C. Livingston Title: Vice President Signature page to the Sixth Amendment, dated as of May 23, 2003, to the Second Amended and Restated Credit Agreement, dated as of May 23, 2000, as amended, among Calpine Corporation, the various financial institutions as are or may become parties thereto and The Bank of Nova Scotia, as administrative agent. FLEET NATIONAL BANK By /s/ ANTHONY D. HEALEY ----------------------------------------- Name: Anthony D. Healey Title: Authorized Signer Signature page to the Sixth Amendment, dated as of May 23, 2003, to the Second Amended and Restated Credit Agreement, dated as of May 23, 2000, as amended, among Calpine Corporation, the various financial institutions as are or may become parties thereto and The Bank of Nova Scotia, as administrative agent. CREDIT SUISSE FIRST BOSTON By /s/ JAMES P. MORAN ----------------------------------------- Name: James P. Moran Title: Director By /s/ BRIAN T. CALDWELL ----------------------------------------- Name: Brian T. Caldwell Title: Director Signature page to the Sixth Amendment, dated as of May 23, 2003, to the Second Amended and Restated Credit Agreement, dated as of May 23, 2000, as amended, among Calpine Corporation, the various financial institutions as are or may become parties thereto and The Bank of Nova Scotia, as administrative agent. TORONTO DOMINION (TEXAS) INC. By /s/ DEBORAH GRAVINESE ----------------------------------------- Name: Deborah Gravinese Title: Managing Director