1 EXHIBIT 4.1 CONFORMED COPY FIRST AMENDMENT dated as of August 31, 1998 (this "Amendment"), among OCCIDENTAL PETROLEUM CORPORATION, a Delaware corporation (hereinafter called the "Company"), the banks (the "Banks") party to the Credit Agreement (as defined below), MORGAN GUARANTY TRUST COMPANY OF NEW YORK and BANCAMERICA SECURITIES, INC., as co-syndication agents (hereinafter, in such capacity, together with any successor to either thereof in such capacity, the "Co-Syndication Agents", with each reference herein to the "Syndication Agent" in the singular meaning MORGAN GUARANTY TRUST COMPANY OF NEW YORK), THE CHASE MANHATTAN BANK, as documentation agent (hereinafter, in such capacity, together with any successor thereto in such capacity, the "Documentation Agent"), THE BANK OF NOVA SCOTIA, as administrative agent (hereinafter, in such capacity, together with any successor thereto in such capacity, the "Administrative Agent"), and ABN AMRO BANK N.V., THE BANK OF NEW YORK, CANADIAN IMPERIAL BANK OF COMMERCE, CITICORP USA, INC., CREDIT LYONNAIS NEW YORK BRANCH, CREDIT SUISSE FIRST BOSTON, BANKBOSTON, N.A., THE FUJI BANK, LIMITED, LOS ANGELES AGENCY, THE INDUSTRIAL BANK OF JAPAN, LIMITED, LOS ANGELES AGENCY, NATIONSBANK, N.A., ROYAL BANK OF CANADA, TORONTO DOMINION (TEXAS), INC. and UBS AG, as co-agents (hereinafter, in such capacity, the "Co-Agents"). A. Reference is made to the Credit Agreement dated as of March 20, 1997 (the "Credit Agreement"), among the Company, the Banks, the ---------------- Co-Syndication Agents, the Documentation Agent, the Administrative Agent and the Co-Agents. Capitalized terms used but not otherwise defined herein have the meanings assigned to them in the Credit Agreement. B. The Company has requested that the Banks amend certain provisions of the Credit Agreement. The Banks are willing to do so, subject to the terms and conditions of this Amendment. Accordingly, in consideration of the mutual agreements herein contained and other good and valuable consideration, the sufficiency and receipt of which are hereby acknowledged, the parties hereto hereby agree as follows: SECTION 1. Amendment to Section 1.01. Section 1.01 of the ------------------------- Credit Agreement is hereby amended by: (a) inserting in the appropriate alphabetical order the following definition: ""Capital Securities" means, with respect to the Company, (i) mandatorily redeemable capital trust securities of trusts which are Subsidiaries and the subordinated debentures of the Company in which the proceeds of the issuance of such capital trust securities are invested, which securities and debentures have an initial final maturity of at least thirty [NYCORP3:660488.3:4443d:09/14/98--4:14p]- 2 2 years, have no scheduled amortization prior to maturity and, in the case of the debentures, allow for the deferral of interest payments for up to five years and have been subordinated to all other indebtedness of the Company and (ii) other securities whose basic structure and terms are similar to those described in (i) which qualify as tier 1 capital under the capital adequacy rules and guidelines of the U.S. Federal Reserve Board applicable to U.S. bank holding companies; provided, however, that in the case of (i) and (ii), such capital securities are accounted for on the financial statements of the Company as a minority interest, Company-Obligated Mandatorily Redeemable Preferred New Capital Securities of Subsidiary Trust Holding Solely New Subordinated Debentures of the Company, or similar balance sheet designation not included in liabilities." (b) replacing the definition of "Consolidated Debt" with the following: ""Consolidated Debt" means the sum of, without duplication (i) Consolidated Funded Debt, including that portion of Consolidated Funded Debt maturing within one year from the date of such determination, (ii) Consolidated Short-Term Borrowings and (iii) obligations reflected for financial reporting purposes as deferred credits for revenue from sales of future production of the Company and its Specified Subsidiaries, minus, through January 5, 1999, the sum of the outstanding principal amounts of two promissory notes, dated January 30, 1998, issued by KN Energy, Inc. to the order of the Company in the principal amounts of $1,000,000,000 and $394,846,122, respectively, each maturing January 4, 1999, to the extent that the Company shall not have assigned, granted a participation in or lien on, or otherwise transferred such notes or any interest therein; provided, however, that Consolidated Debt shall in no event include any Capital Securities of the Company or any of its Subsidiaries." (c) replacing the definition of "Tangible Net Worth" with the following: ""Tangible Net Worth" of any Person means the sum of the amounts set forth on the balance sheet of such Person as (a) the par or stated value of all outstanding capital stock, (b) the amount of the Capital Securities of such Person, without duplication of the mandatorily redeemable capital trust securities and the subordinated debentures of the Company in which the proceeds of the issuance of such capital trust securities are invested; provided that the aggregate amount of Capital Securities added pursuant to this clause (b) at any time of issuance thereof shall not exceed 5% of the sum of Consolidated Debt and Consolidated Adjusted Tangible Net Worth, calculated as of the time of such issuance of any such securities and (c) capital surplus, earned surplus and premium on capital stock less (i) the par or stated value of all redeemable preferred stock, (ii) that portion of the book value of all assets which would be treated as intangibles under generally accepted accounting principles, including without limitation, all such items as goodwill, trademarks, trade names, brands, copyrights, patents, licenses and rights with respect to the foregoing and unamortized debt discount and expenses, and (iii) all [NYCORP3:660488.3:4443d:09/14/98--4:14p]- 3 3 investments in or advances to Excepted Subsidiaries appearing on the asset side of such balance sheet." SECTION 2. Conditions to Effectiveness. This Amendment shall --------------------------- become effective as of the date first above written upon receipt by the Syndication Agent of duly executed counterparts hereof which, when taken together, bear the authorized signatures of the Company and the Required Banks. SECTION 3. GOVERNING LAW. THIS AMENDMENT SHALL BE DEEMED TO ------------- BE A CONTRACT MADE UNDER THE LAWS OF THE STATE OF NEW YORK, AND FOR ALL PURPOSES SHALL BE CONSTRUED IN ACCORDANCE WITH THE LAWS OF SAID STATE WITHOUT REGARD TO PRINCIPLES OF CONFLICTS OF LAW. SECTION 4. Execution in Counterparts. This Amendment may be ------------------------- executed in any number of counterparts and by different parties hereto on separate counterparts, each of which counterparts, when so executed and delivered, shall be deemed to be an original and all of which counterparts, taken together, shall constitute but one and the same Amendment. Delivery of an executed signature page to this Amendment by facsimile shall be as effective as delivery of a manually signed counterpart of this Amendment. SECTION 5. Expenses. The Company agrees to reimburse the -------- Syndication Agent for its out-of-pocket expenses in connection with this Amendment, including the reasonable fees, charges and disbursements of Cravath, Swaine & Moore, counsel for the Syndication Agent. SECTION 6. Terms and Conditions. Except as specifically -------------------- modified herein, all other terms and conditions of the Credit Agreement shall remain in full force and effect. IN WITNESS WHEREOF, the parties hereto have caused this Amendment to be duly executed by their respective duly authorized officers as of the date first above written. OCCIDENTAL PETROLEUM CORPORATION, by /s/ J.R. Havert ---------------------------------------- Name: J.R. Havert Title: Senior Assistant Treasurer [NYCORP3:660488.3:4443d:09/14/98--4:14p]- 4 4 MORGAN GUARANTY TRUST COMPANY OF NEW YORK, in its individual capacity and as Syndication Agent, by /s/ Diana H. Imhof ---------------------------------------- Name: Diana H. Imhof Title: Vice President ABN AMRO BANK N.V., by /s/ Paul K. Stimpfl ---------------------------------------- Name: Paul K. Stimpfl Title: Group Vice President /s/ Shikha Rehman ---------------------------------------- Name: Shikha Rehman Title: Assistant Vice President ARAB BANK PLC, by /s/ Nofal S. Barbar ---------------------------------------- Name: Nofal S. Barbar Title: Executive Vice President AUSTRALIA AND NEW ZEALAND BANKING GROUP LIMITED, by ---------------------------------------- Name: Title: BANCA DI ROMA SPA, by /s/ Richard G. Dietz ---------------------------------------- Name: Richard G. Dietz Title: 97271 by /s/ Augusto Bianchi ---------------------------------------- Name: Augusto Bianchi Title: 97911 [NYCORP3:660488.3:4443d:09/14/98--4:14p]- 5 5 BANK OF AMERICA NATIONAL TRUST AND SAVINGS ASSOCIATION, by /s/ Paul L. Colon ---------------------------------------- Name: Paul L. Colon Title: Vice President BANKBOSTON, N.A., by /s/ Sarah P.Z. Dwyer ---------------------------------------- Name: Sarah P.Z. Dwyer Title: Vice President BANK OF MONTREAL, by /s/ Cahal B. Carmody ---------------------------------------- Name: Cahal B. Carmody Title: Director THE BANK OF NOVA SCOTIA, by /s/ M. Van Oterloo ---------------------------------------- Name: M. Van Oterloo Title: Senior Relationship Manager THE BANK OF NEW YORK, by /s/ Ian K. Stewart ---------------------------------------- Name: Ian K. Stewart Title: Senior Vice President BANQUE NATIONALE DE PARIS, by /s/ Clive Bettles ---------------------------------------- Name: Clive Bettles Title: SVP & Manager by /s/ Mitchell M. Ozawa ---------------------------------------- Name: Mitchell M. Ozawa Title: Vice President [NYCORP3:660488.3:4443d:09/14/98--4:14p]- 6 6 BBL INTERNATIONAL (U.K.) LIMITED, by /s/ Marie-Claire Swinnen ---------------------------------------- Name: Marie-Claire Swinnen Title: Authorized Signatory by /s/ Alun Michael ---------------------------------------- Name: Alun Michael Title: AGM CANADIAN IMPERIAL BANK OF COMMERCE, by ---------------------------------------- Name: Title: THE CHASE MANHATTAN BANK, by /s/ Peter M. Ling ---------------------------------------- Name: Peter M. Ling Title: Vice President CITICORP USA, INC., by /s/ Mark Stanfield Packard ---------------------------------------- Name: Mark Stanfield Packard Title: Vice President CREDIT LYONNAIS NEW YORK BRANCH, by /s/ Philippe Soustra ---------------------------------------- Name: Philippe Soustra Title: Senior Vice President [NYCORP3:660488.3:4443d:09/14/98--4:14p]- 7 7 CREDIT SUISSE FIRST BOSTON, by /s/ Douglas E. Maher ---------------------------------------- Name: Douglas E. Maher Title: Vice President by /s/ James P. Moran ---------------------------------------- Name: James P. Moran Title: Director DRESDNER BANK AG, NEW YORK BRANCH AND GRAND CAYMAN BRANCH, by ---------------------------------------- Name: Title: by ---------------------------------------- Name: Title: THE FUJI BANK, LIMITED, LOS ANGELES AGENCY, by /s/ Masahito Fukuda ---------------------------------------- Name: Masahito Fukuda Title: Joint General Manager GULF INTERNATIONAL BANK B.S.C., by /s/ Abdel-Fattah Tahoun ---------------------------------------- Name: Abdel-Fattah Tahoun Title: Senior Vice President by /s/ William B. Shepard ---------------------------------------- Name: William B. Shepard Title: Vice- President [NYCORP3:660488.3:4443d:09/14/98--4:14p]- 8 8 THE INDUSTRIAL BANK OF JAPAN, LIMITED, LOS ANGELES AGENCY, by /s/ Stephen A. Arce ---------------------------------------- Name: Stephen A. Arce Title: Vice President KBC BANK N.V., by /s/ Robert Snauffer ---------------------------------------- Name: Robert Snauffer Title: First Vice President by /s/ Marcel Claes ---------------------------------------- Name: Marcel Claes Title: Deputy General Manager MELLON BANK, N.A., by /s/ Lawrence C. Ivey ---------------------------------------- Name: Lawrence C. Ivey Title: Vice President NATIONAL WESTMINSTER BANK PLC, NEW YORK BRANCH AND NASSAU BRANCH by /s/ Kevin Howard ---------------------------------------- Name: Kevin Howard Title: Executive Vice President NATIONSBANK, N.A., by /s/ Tracey S. Barclay ---------------------------------------- Name: Tracey S. Barclay Title: SVP [NYCORP3:660488.3:4443d:09/14/98--4:14p]- 9 9 ROYAL BANK OF CANADA, by /s/ Andrew C. Williamson ---------------------------------------- Name: Andrew C. Williamson Title: Senior Manager THE SAKURA BANK, LIMITED, by /s/ Masayuki Kobayashi ---------------------------------------- Name: Masayuki Kobayashi Title: Joint General Manager STANDARD CHARTERED BANK, by /s/ Kristina McDavid ---------------------------------------- Name: Kristina McDavid Title: Vice President by /s/ Yoo Hee Kim ---------------------------------------- Name: Yoo Hee Kim Title: Relationship Manager TORONTO DOMINION (TEXAS), INC., by /s/ Jimmy Simien ---------------------------------------- Name: Jimmy Simien Title: Vice President [NYCORP3:660488.3:4443d:09/14/98--4:14p]- 10 10 UBS AG, (as successor by merger to Union Bank of Switzerland), by New York Branch, by /s/ Leo L. Baltz ---------------------------------------- Name: Leo L. Baltz Title: Director by /s/ Eric C. Hanson ---------------------------------------- Name: Eric C. Hanson Title: AD UNION BANK OF CALIFORNIA, N.A., by /s/ Dustin Gaspari ---------------------------------------- Name: Dustin Gaspari Title: AVP [NYCORP3:660488.3:4443d:09/14/98--4:14p]-