1 Exhibit (10)(o) THIRD AMENDMENT TO CREDIT AGREEMENT THIS THIRD AMENDMENT TO CREDIT AGREEMENT is made and dated as of August 15, 1996 (the "THIRD AMENDMENT") among ONEOK INC., a Delaware corporation (the "COMPANY"), the financial institutions party to the Credit Agreement (collectively, the "BANKS") referred to below, and BANK OF AMERICA NATIONAL TRUST AND SAVINGS ASSOCIATION, as Agent (the "AGENT"), and amends that certain Credit Agreement dated as of August 20, 1993, among the Company, the Banks and the Agent, as amended by a First Amendment dated as of August 18, 1994 and a Second Amendment dated as of August 17, 1995 (as so amended or modified from time to time, the "AGREEMENT"). RECITALS The Company has requested that the Agreement be amended, and the Banks and the Agent are willing to do so on the terms and conditions set forth herein. NOW, THEREFORE, for good and valuable consideration, the receipt and adequacy of which are hereby acknowledged, the parties hereby agree as follows: 1. Terms. All terms used herein shall have the same meanings as in the Agreement unless otherwise defined herein. All references to the Agreement shall mean the Agreement as hereby amended. 2. Amendments. The Borrower, the Banks and the Agent hereby agree to amend the Agreement as follows: 2.1 The definition of "Maturity Date" in Section 1.1 of the Agreement is hereby amended by deleting "August 15, 1996" and inserting "August 13, 1997" in lieu thereof. 2.2 The definition of "Offshore Applicable Margin" in Section 1.1 of the Agreement shall be amended and restated in its entirety as follows: "Offshore Applicable Margin" means, with respect to Offshore Rate Loans, 0.20% per annum." 2.3 Section 5.5 shall be amended by deleting "August 31, 1994" and inserting "August 31, 1995" and by deleting "November 30, 1994, February 28, 1995 and May 31, 1995" and inserting "November 30, 1995, February 28, 1996 and May 31, 1996" in lieu thereof. 2.4 Section 5.11(b) shall be amended by deleting "August 31, 1994" and inserting "August 31, 1995" in lieu thereof. 2.5 Schedules 1.1 and 3 attached to the Credit Agreement are hereby deleted and Schedule 1.1 and 3 attached to this Third Amendment are inserted in lieu thereof. 3. Representations and Warranties. The Company represents and warrants to Banks and Agent that, on and as of the date hereof, and after giving effect to this Third Amendment: 3.1 Authorization. The execution, delivery and performance of this Third Amendment have been duly authorized by all necessary corporate action by the Company and this Third Amendment has been duly executed and delivered by the Company. 3.2 Binding Obligation. This Third Amendment is the legal, valid and binding obligation of Company, enforceable against the Company in accordance with its terms. 55 2 3.3 No Legal Obstacle to Agreement. The execution, delivery and performance of this Third Amendment will not (a) contravene the terms of the Company's certificate of incorporation, by-laws or other organization document; (b) conflict with or result in any breach or contravention of the provisions of any contract to which the Company is a party, or the violation of any law, judgment, decree or governmental order, rule or regulation applicable to Company, or result in the creation under any agreement or instrument of any security interest, lien, charge, or encumbrance upon any of the assets of the Company. No approval or authorization of any governmental authority is required to permit the execution, delivery or performance by the Company of this Third Amendment, or the transactions contemplated hereby. 3.4 Incorporation of Certain Representations. The representations and warranties of the Company set forth in Section 5 of the Agreement are true and correct in all respects on and as of the date hereof as though made on and as of the date hereof. 3.5 Default. No Default or Event of Default under the Agreement has occurred and is continuing. 4. Conditions, Effectiveness. The effectiveness of this Third Amendment shall be subject to the compliance by the Company with its agreements herein contained, and to the delivery of the following to the Agent in form and substance satisfactory to the Agent and the Banks: 4.1 Authorized Signatories. A certificate, signed by the Secretary or an Assistant Secretary of the Company and dated the date of this Third Amendment, as to the incumbency of the person or persons authorized to execute and deliver this Third Amendment and any instrument or agreement required hereunder on behalf of the Company. 4.2 Other Evidence. Such other evidence with respect to the Company or any other person as the Agent or any Bank may reasonably request in connection with this Third Amendment and the compliance with the conditions set forth herein. 5. Miscellaneous. 5.1 Purchasing and Selling of Commitments and Loans. On the date of this Third Amendment, certain Banks (the "Buying Banks") hereby agree to purchase without recourse, and certain Banks (the "Selling Banks") hereby agree to sell without recourse, such an interest in the Aggregate Commitment and the outstanding Loans as is required to give each Bank its share of the Aggregate Commitment and Loans indicated on Schedule 1.1 hereto. Each Selling Bank represents and warrants to each Buying Bank that it is the legal and beneficial owner of the Commitment and Loans being assigned by it and that the same are free and clear of any adverse claim. Other than as provided above, no Selling Bank makes any representation or warranty and assumes no responsibility with respect to the Commitments, the Loans, this Agreement or any other instrument or document furnished pursuant thereto, the financial condition of the Company, or the performance or observance by the Company hereunder. The Company agrees to pay on demand directly to any Selling Bank any costs of the type set forth in Section 3.6 incurred by such Selling Bank in respect of any portion of its Loans being assigned hereunder. The Company and the Agent hereby consent to such assignments. By signing below, each Buying Bank not heretofore a Bank hereunder agrees to be a party to, and be bound by the terms of, this Agreement as a "Bank" thereunder as if a signatory thereto. From and after the date hereof, Bank IV of Oklahoma, N.A. and The Bank of Nova Scotia shall no longer be parties to this Agreement. 56 3 5.2 Effectiveness of the Agreement and the Loan Documents. Except as hereby expressly amended, the Agreement and each other Loan Document shall each remain in full force and effect, and are hereby ratified and confirmed in all respects on and as of the date hereof. 5.3 Waivers. This Third Amendment is limited solely to the matters expressly set forth herein and is specific in time and in intent and does not constitute, nor should it be construed as, a waiver or amendment of any other term or condition, right, power or privilege under the Agreement, the Loan Documents, or under any agreement, contract, indenture, document or instrument mentioned therein; nor does it preclude or prejudice any rights of the Agent or the Banks thereunder, or any exercise thereof or the exercise of any other right, power or privilege, nor shall it require the Requisite Banks to agree to an amendment, waiver or consent for a similar transaction or on a future occasion, nor shall any future waiver of any right, power, privilege or default hereunder, or under any agreement, contract, indenture, document or instrument mentioned in the Agreement, constitute a waiver of any other default of the same or of any other term or provision. 5.4 Counterparts. This Third Amendment may be executed in any number of counterparts and all of such counterparts taken together shall be deemed to constitute one and the same instrument. This Third Amendment shall not become effective until the Company, the Banks and the Agent shall have signed a copy hereof, whether the same or counterparts, and the same shall have been delivered to the Agent. 5.5 Jurisdiction. This Third Amendment shall be governed by and construed under the laws of the State of California. 57 4 IN WITNESS WHEREOF, the parties hereto have caused this Amendment to be duly executed and delivered as of the date first written above. ONEOK Inc. By: JERRY D. NEAL Name: Jerry D. Neal Title: Vice President, Treasurer, Chief Financial Officer, and Chief Accounting Officer BANK OF AMERICA NATIONAL TRUST AND SAVINGS ASSOCIATION, as Agent By: PEGGY FUJIMOTO Title: Vice President BANK OF AMERICA NATIONAL TRUST AND SAVINGS ASSOCIATION, as a Bank By: VANESSA SHEH MEYER Title: Vice President TEXAS COMMERCE BANK NATIONAL ASSOCIATION By: DONNA GERMAN Title: Senior Vice President MELLON BANK, N.A. By: SCOTT HENNESSEE Title: Assistant Vice President BANK OF OKLAHOMA, N.A. By: JANE FAULKENBERRY Title: Vice President FIRST SOUTHWEST BANK OF FREDERICK By: GREG BOUDREAU Title: Assistant Vice President (Signatures continue) 58 5 BOATMEN'S FIRST NATIONAL BANK OF OKLAHOMA By: HAYDEN HYDE Title: Senior Vice President LIBERTY BANK & TRUST COMPANY OF OKLAHOMA CITY, N.A. By: LAURA CHRISTOFFERSON Title: Vice President LIBERTY BANK & TRUST CO. OF TULSA, N.A. By: ROBERT D. MATTAX Title: Vice President THE STILLWATER NATIONAL BANK AND TRUST COMPANY By: DAVID W. PITTS Title: Vice President CITIZENS BANK OF LAWTON By: DAN TORBETT Title: Executive Vice President WESTAR BANK OF BARTLESVILLE By: DAVID KEDY Title: Senior Vice President NATIONSBANK OF TEXAS, N.A. By: CURTIS L. ANDERSON Title: Senior Vice President BANK ONE, OKLAHOMA CITY By: JAMES R. KARCHER Title: Senior Vice President 59 6 BANK IV OF OKLAHOMA, N.A. (as a Selling Bank for purposes of Section 5.1 only) By: HAYDEN HYDE Title: Senior Vice President THE BANK OF NOVA SCOTIA (as a Selling Bank for purposes of Section 5.1 only) By: F. C. H. ASHBY Title: Senior Manager, Loan Operations 60 7 SCHEDULE 1.1 COMMITMENTS AND PRO RATA SHARES - -------------------------------------------------------------------------------------------------- PRO RATA BANK COMMITMENT SHARE - -------------------------------------------------------------------------------------------------- Bank of America National Trust and Savings Association $31,000,000 24.80% Texas Commerce Bank National Association 21,000,000 16.80% Mellon Bank, N.A. 12,000,000 9.60% Bank of Oklahoma, N.A. 14,000,000 11.20% Boatmen's First National Bank of Oklahoma 12,000,000 9.60% Liberty Bank & Trust Company of Oklahoma City, N.A. 8,000,000 6.40% Liberty Bank & Trust Co. of Tulsa, N.A. 6,000,000 4.80% The Stillwater National Bank and Trust Company 1,000,000 0.80% Citizens Bank of Lawton 1,000,000 0.80% Westar Bank of Bartlesville 1,000,000 0.80% Nations Bank of Texas, N.A. 15,000,000 12.00% Bank One, Oklahoma City 2,000,000 1.60% First Southwest Bank of Frederick 1,000,000 .80% - -------------------------------------------------------------------------------------------------- TOTAL: $125,000,000 100.00% - -------------------------------------------------------------------------------------------------- 61 8 SCHEDULE 3 OFFSHORE AND DOMESTIC LENDING OFFICES ADDRESSES FOR NOTICES DONNA GERMAN ROBERT D. MATTAX Texas Commerce Bank N.A. Liberty Bank & Trust Company of Tulsa P.O. Box 660197 Fourth Floor Dallas, TX 75266-0197 15 East Fifth Street Phone: (214) 922-2540 Tulsa, OK 74103 Fax: (214) 922-2389 Phone: (918) 586-5179 Fax: (918) 586-5952 JANE A. FAULKENBERRY JAMES R. KARCHER Bank of Oklahoma Bank One, Oklahoma City Eighth Floor 6303 North Portland One Williams Center Oklahoma City, OK73112 Tulsa, OK 74172 Phone: (405) 272-2860 Phone: (918) 588-6272 Fax: (405) 272-7528 Fax: (918) 588-6880 LAURA L. CHRISTOFFERSON SCOTT HENNESSEE Liberty National Bank and Trust Company Mellon Bank 100 North Broadway One Mellon Bank Center Oklahoma City, OK 73102 Pittsburgh, PA 15258 Phone: (405) 231-6853 Phone: (412) 234-4458 Fax: (405) 231-6788 Fax: (412) 234-6375 CURTIS L. ANDERSON MAY SEEMAN Nations Bank of Texas, N.A. Vice President Sixty Fourth Floor Bank of America NT&SA (Lender) 901 Main Street 4th Floor - 1850 Gateway Dallas, TX 75202 Concord, CA 94520 Phone: (214) 508-1290 Phone: (510) 675-7483 Fax: (214) 508-3943 Fax: (510) 603-8208 HAYDEN HYDE DAVID SISLER Boatmen's First National Bank of Oklahoma Bank of America NT&SA (Agent and Lender) 515 So. Boulder, Lobby Level Three Allen Center, Ste. 4550 Tulsa, OK 74103 333 Clay Street Phone: (918) 591-8319 Houston, TX 77002 Fax: (918) 591-8209 Phone: (713) 651-4875 Fax: (713) 651-4808 62 9 DAN TORBETT DAVID W. PITTS Citizens Bank, Lawton, Oklahoma The Stillwater National Bank & Trust Company 1420 W. Lee Boulevard 608 South Main Street Lawton, OK 73501 Stillwater, OK 74076 Phone: (405) 250-4145 Phone: (405) 372-2230 Fax: (405) 250-4343 Fax: (405) 377-3808 DAVID KEDY GREG BOUDREAU WestStar Bank First Southwest Bank of Frederick 100 South East Frank Phillips Blvd. 200 N. Main Bartlesville, OK 74003 Frederick, OK 73542 Phone: (918) 337-3000 Phone: (405) 335-7522 Fax: (918) 337-3506 Fax: (405) 335-7520 63