1 [CONFORMED COPY] AMENDED AND RESTATED CREDIT AGREEMENT AMENDED AND RESTATED CREDIT AGREEMENT dated as of August 7, 1996 among USX CORPORATION (the "Borrower"), the MANAGING AGENTS, CO-AGENTS and other BANKS listed on the signature pages hereof (the "Banks") and MORGAN GUARANTY TRUST COMPANY OF NEW YORK, as Agent (the "Agent"). W I T N E S S E T H : WHEREAS, certain of the parties hereto have heretofore entered into a Credit Agreement dated as of August 18, 1994 (the "Agreement"); and WHEREAS, the parties hereto desire to amend the Agreement as set forth herein and to restate the Agreement in its entirety to read as set forth in the Agreement with the amendments specified below; NOW, THEREFORE, the parties hereto agree as follows: SECTION 1. Definitions; References. Unless otherwise specifically defined herein, each capitalized term used herein which is defined in the Agreement shall have the meaning assigned to such term in the Agreement. Each reference to "hereof", "hereunder", "herein" and "hereby" and each other similar reference and each reference to "this Agreement" and each other similar reference contained in the Agreement shall from and after the date hereof refer to the Agreement as amended and restated hereby. The term "Notes" defined in the Agreement shall include from and after the date hereof the New Notes (as defined below). SECTION 2. Amendment of Termination Date. The definition of "Termination Date" in Section 1.01 of the Agreement is amended to read in its entirety as follows: "Termination Date" means August 18, 2001, or, if such day is not a Euro- Dollar Business Day, the next succeeding Euro-Dollar Business Day, unless such Euro-Dollar Business Day falls in another calendar month, in which case the Termination Date shall be the next preceding Euro-Dollar Business Day. 2 SECTION 3. Amendment of Section 1.01. (a) The definitions of "Level I Status," "Level II Status," "Level III Status," "Level IV Status," "Level V Status," and "Status" in Section 1.01 of the Agreement are hereby deleted. (b) Section 1.01 of the Agreement is amended by inserting the following definition of the "Pricing Schedule" immediately after the definition of "Plan": "Pricing Schedule" means the schedule attached as Schedule II hereto and identified as "a Pricing Schedule." (c) The Agreement is amended by attaching the Pricing Schedule attached as Schedule II hereto as Schedule II to the Agreement. SECTION 4. Amendment of Section 2.07(h). Section 2.07(h) of the Agreement is amended to read in its entirety as follows: (h) The "Applicable Margin" with respect to any Committed Loan at any date is the applicable percentage amount set forth in the Pricing Schedule based on the Type of such Loan and the Status (as defined in the Pricing Schedule) on such date. SECTION 5. Amendment of Section 2.08. Section 2.08 of the Agreement is amended to read in its entirety as follows: (a) Facility Fees. During the period from and including the Commencement Date to but not including the Termination Date (or such earlier or later date on which the Commitments shall have terminated in their entirety and the Loans shall have been repaid in full), the Borrower shall pay to the Agent for the account of each Bank a facility fee at the Facility Fee Rate (determined daily in accordance with the Pricing Schedule) on the daily amount of such Bank's Commitment (whether used or unused) and, after termination of the Commitments and until repayment in full of the Loans, on the aggregate outstanding principal amount of the Loans. (b) Payments. Accrued fees under this Section shall be payable quarterly in arrears on each March 31, June 30, September 30, and December 31 on or prior to the date of termination of the Commitments in their entirety and upon 3 the date of termination of the Commitments in their entirety (and, if later, the date the Loans shall be repaid in their entirety). SECTION 6. Changes in Commitments. With effect from and including the date this Amendment and Restatement becomes effective in accordance with Section 11 hereof, (i) each Person listed on the signature pages hereof which is not a party to the Agreement (a "New Bank") shall become a Bank party to the Agreement and (ii) the Commitment of each Bank shall be the amount set forth on Schedule I attached hereto. Any Bank whose Commitment is changed to zero shall upon such effectiveness cease to be a Bank party to the Agreement, and all accrued fees and other amounts payable under the Agreement for the account of such Bank shall be due and payable on such date; provided that the provisions of Sections 8.03 and 9.03 of the Agreement shall continue to inure to the benefit of each such Bank. SECTION 7. Amendment of Schedule I. Schedule I of the Agreement is amended to read in its entirety as set forth in Schedule I attached hereto. SECTION 8. Amendment of Article IV. (a) Each reference to "1993" in Article IV of the Agreement is amended to read "1995." (b) Each reference to "June 30, 1994" in Article IV of the Agreement is amended to read "March 31, 1996." (c) Each reference to "six month" or "six months" in Section 4.04(b) of the Agreement is amended to read, respectively, "three month" or "three months." SECTION 9. Representations and Warranties. The Borrower hereby represents and warrants that as of the date hereof and after giving effect thereto: (a) no Default has occurred and is continuing; and (b) each representation and warranty of the Borrower set forth in the Agreement after giving effect to this Amendment and Restatement is true and correct as though made on and as of this date. SECTION 10. Governing Law. This Amendment and Restatement shall be governed by and construed in accordance with the laws of the State of New York. 4 SECTION 11. Counterparts; Effectiveness. This Amendment and Restatement may be signed in any number of counterparts, each of which shall be an original, with the same effect as if the signatures thereto and hereto were upon the same instrument. This Amendment and Restatement shall become effective as of the date hereof when (i) the Agent shall have received duly executed counterparts hereof signed by each of the parties hereto (or, in the case of any party as to which an executed counterpart shall not have been received, the Agent shall have received telegraphic, telex or other written confirmation from such party of execution of a counterpart hereof by such party); (ii) the Agent shall have received a duly executed Note for each of the New Banks (a "New Note"), dated on or before the date of effectiveness hereof and otherwise in compliance with Section 2.05 of the Agreement; (iii) the Agent shall have received an opinion of the General Counsel of the Borrower (or such other counsel for the Borrower as may be acceptable to the Agent), substantially in the form of Exhibit E to the Agreement with reference to the New Notes, this Amendment and Restatement and the Agreement as amended and restated hereby; and (iv) the Agent shall have received all documents it may reasonably request relating to the existence of the Borrower, the corporate authority for and the validity of the Agreement as amended and restated hereby, the New Notes and any other matters relevant hereto, all in form and substance satisfactory to the Agent. The rights and obligations of the parties in respect of periods prior to the effective date of this Amendment and Restatement shall be governed by the terms of the Agreement as in effect at the time. 5 IN WITNESS WHEREOF, the parties hereto have caused this Agreement to be duly executed by their respective authorized officers as of the day and year first above written. USX CORPORATION By /s/ John Richmond ------------------------ Title: Assistant Treasurer 6 Agent - ----- MORGAN GUARANTY TRUST COMPANY OF NEW YORK, as Bank and as Agent By /s/ Laura E. Reim ------------------------ Title: Vice President Managing Agents - --------------- THE BANK OF NOVA SCOTIA, as Bank and as Managing Agent By /s/ F.C.H. Ashby ------------------------ Title: Senior Manager Loan Operations THE CHASE MANHATTAN BANK, as Bank and as Managing Agent (as successor to THE CHASE MANHATTAN BANK, N.A. and CHEMICAL BANK) By /s/ Peter M. Ling ---------------------------- Title: Vice President Co-Agents - --------- BANK OF AMERICA ILLINOIS (formerly known as CONTINENTAL BANK) By /s/ Ronald E. McKaig ---------------------------- Title: Vice President THE BANK OF NEW YORK By /s/ Robert J. Joyce ---------------------------- Title: Vice President 7 BANK OF TOKYO-MITSUBISHI TRUST COMPANY (as successor to THE BANK OF TOKYO TRUST COMPANY) By /s/ S.L. Fountain ---------------------------- Title: Vice President CITIBANK, N.A. By /s/ Rufus Beldam ---------------------------- Title: Vice President COMMERZBANK AKTIENGESELLSCHAFT By /s/ Sean Harrigan ---------------------------- Title: Senior Vice President By /s/ Andrew Campbell ---------------------------- Title: Assistant Cashier THE FUJI BANK, LIMITED By /s/ Gina M. Kearns ---------------------------- Title: Vice President & Manager THE INDUSTRIAL BANK OF JAPAN, LIMITED By /s/ Robert W. Ramage, Jr. ---------------------------- Title: Senior Vice President THE LONG-TERM CREDIT BANK OF JAPAN, LIMITED By /s/ Norboru Kubota ---------------------------- Title: Deputy General Manager 8 MELLON BANK, N.A. By /s/ Richard K. James ---------------------------- Title: Vice President NATIONSBANK OF TEXAS, N.A. By /s/ Paul A. Squires ---------------------------- Title: Senior Vice President PNC BANK, NATIONAL ASSOCIATION By /s/ Sean D.S. Sebastian ---------------------------- Title: Assistant Vice President THE SANWA BANK, LIMITED, NEW YORK BRANCH By /s/ Jean-Michel Fatovic ---------------------------- Title: Vice President SOCIETE GENERALE By /s/ Salvatore Galatioto ---------------------------- Title: First Vice President 9 THE SUMITOMO BANK, LIMITED By /s/ C. Michael Garrido ---------------------------- Title: Senior Vice President Other Banks - ----------- COMERICA BANK By /s/ Chris Georvassilis ---------------------------- Title: Vice President 10 THE DAI-ICHI KANGYO BANK, LTD. By /s/ Robert P. Gallagher, Jr. ---------------------------- Title: Assistant Vice President THE FIRST NATIONAL BANK OF CHICAGO By /s/ Amy R. Fahey ---------------------------- Title: Vice President NATIONAL CITY BANK By /s/ Davis R. Bonner ---------------------------- Title: Vice President ROYAL BANK OF CANADA By /s/ Lorna P. Mendelson ---------------------------- Title: Associate THE TOKAI BANK, LTD. By /s/ Stuart M. Schulman ---------------------------- Title: Senior Vice President 11 THE YASUDA TRUST AND BANKING COMPANY, LTD. By /s/ Rohn M. Laudenschlager ---------------------------- Title: Senior Vice President ABN AMRO BANK N.V. ABN AMRO North America, Inc. as Agent By /s/ Andre Nel ---------------------------- Title: Senior Vice President Managing Director-Pittsburgh By /s/ Kathryn C. Toth ---------------------------- Title: Group Vice President and Operational Manager BANK OF MONTREAL By /s/ Joseph Longpre ---------------------------- Title: Managing Director C I B C Inc. By /s/ Patrice C. Wetzel ---------------------------- Title: Director 12 THE MITSUBISHI TRUST AND BANKING CORP. By /s/ Akira Suzuki ---------------------------- Title: Deputy General Manager THE NORTHERN TRUST COMPANY By /s/ John J. Conway ---------------------------- Title: Vice President UNION BANK OF SWITZERLAND By /s/ Dieter Hoeppli ---------------------------- Title: Assistant Vice President By /s/ Laurent J. Chaix ---------------------------- Title: Vice President FIRST NATIONAL BANK OF MARYLAND By /s/ Andrew W. Fish ---------------------------- Title: Vice President 13 KREDIETBANK, N.V. By /s/ Armen Karozichian ---------------------------- Title: Vice President By /s/ Robert Snauffer ---------------------------- Title: Vice President THE SAKURA BANK, LIMITED By /s/ Koji Suzuki ---------------------------- Title: Vice President & Manager AMSOUTH BANK OF ALABAMA By /s/ Robert B. DeHaven ---------------------------- Title: Vice President BANK OF HAWAII By /s/ Joseph T. Donalson ---------------------------- Title: Vice President CREDIT LYONNAIS NEW YORK BRANCH By /s/ Robert Ivosevich ---------------------------- Title: Senior Vice President 14 DRESDNER BANK AG NEW YORK AND GRAND CAYMAN BRANCHES By /s/ J. Curtin Beaudouin ---------------------------- Title: First Vice President By /s/ M. Scott Sehnert ---------------------------- Title: Assistant Treasurer FIRST BANK NATIONAL ASSOCIATION By /s/ Elliot Jaffee ---------------------------- Title: Vice President GULF INTERNATIONAL BANK B.S.C. By /s/ Abdel-Fattah Tahoun ---------------------------- Title: Senior Vice President By /s/ Thomas E. Fitzherbert ---------------------------- Title: Vice President THE NIPPON CREDIT BANK, LTD. By /s/ Nancy Acevedo ---------------------------- Title: Assistant Vice President 15 ISTITUTO BANCARIO SAN PAOLO DI TORINO S.p.A. By /s/ Robert Wurster ---------------------------- Title: First Vice President By /s/ Ettore Viazzo ---------------------------- Title: Vice President THE TOYO TRUST & BANKING CO., LTD By /s/ Hirovuki Fukuro ---------------------------- Title: Vice President 16 BANK OF AMERICA NATIONAL TRUST & SAVINGS ASSOCIATION By /s/ Ronald E. McKaig ---------------------------- Title: Vice President THE BANK OF TOKYO-MITSUBISHI, LTD. (as successor to THE MITSUBISHI BANK, LTD., NEW YORK BRANCH) By /s/ Sharon Fountain ---------------------------- Title: Attorney-In-Fact THE FIRST NATIONAL BANK OF BOSTON By /s/ Maura C. Wadlinger ---------------------------- Title: Vice President NBD BANK, N.A. By /s/ Timothy J. King ---------------------------- Title: Authorized Agent UNION BANK OF CALIFORNIA (as successor to THE BANK OF CALIFORNIA, N.A.) By /s/ Cary Moore ---------------------------- Title: Vice President 1 SCHEDULE I BANKS COMMITMENTS - ----- ----------- Morgan Guaranty Trust Company $100,000,000 of New York The Bank of Nova Scotia $100,000,000 The Chase Manhattan Bank $100,000,000 (as successor to The Chase Manhattan Bank, N.A. and Chemical Bank) Bank of America Illinois $100,000,000 (formerly known as Continental Bank) Bank of Tokyo-Mitsubishi Trust Company $80,000,000 (as successor to the Bank of Tokyo Trust Company) Citibank, N.A. $75,000,000 Commerzbank Aktiengesellschaft $75,000,000 The Fuji Bank, Limited $75,000,000 Mellon Bank, N.A. $100,000,000 NationsBank of Texas, N.A. $75,000,000 PNC Bank, National Association $100,000,000 Societe Generale $75,000,000 The Bank of New York $100,000,000 The Industrial Bank of Japan, Limited $75,000,000 The Long-Term Credit Bank of Japan, Limited $75,000,000 The Sanwa Bank, Limited $75,000,000 2 SCHEDULE I (cont'd) BANKS COMMITMENTS - ----- ----------- The Sumitomo Bank, Limited $75,000,000 Comerica Bank $60,000,000 The Dai-Ichi Kangyo Bank, Ltd. $60,000,000 The First National Bank of Chicago $50,000,000 National City Bank $50,000,000 Royal Bank of Canada $50,000,000 The Tokai Bank, Ltd. $50,000,000 The Yasuda Trust and Banking Company, Ltd. $50,000,000 ABN AMRO Bank N.V. $35,000,000 Bank of Montreal $35,000,000 C I B C Inc. $35,000,000 The Mitsubishi Trust and Banking Corp. $35,000,000 The Northern Trust Company $35,000,000 Union Bank of Switzerland $35,000,000 First National Bank of Maryland $30,000,000 Kredietbank, N.V. $30,000,000 The Sakura Bank, Limited $30,000,000 AmSouth Bank of Alabama $25,000,000 Bank of Hawaii $25,000,000 Credit Lyonnais $25,000,000 3 SCHEDULE I (cont'd) BANKS COMMITMENTS - ----- ----------- Dresdner Bank AG New York and Grand Cayman $25,000,000 Branches First Bank National Association $25,000,000 Gulf International Bank B.S.C. $25,000,000 The Nippon Credit Bank, Ltd. $25,000,000 Istituto Bancario San Paolo Di Torino S.p.A. $25,000,000 The Toyo Trust & Banking Co., Ltd. $25,000,000 Bank of America National Trust & Savings $0 Association The Bank of Tokyo-Mitsubishi, Ltd. $0 (as successor to The Mitsubishi Bank, Ltd., New York Branch) The First National Bank of Boston $0 NBD Bank, N.A. $0 Union Bank of California $0 (as successor to The Bank of California, N.A.) 1 SCHEDULE II PRICING SCHEDULE The "Euro-Dollar Margin", "CD Margin" and "Facility Fee Rate" for any day are the respective percentages set forth below in the applicable row under the column corresponding to the Status that exists on such day: - -------------------------------------------------------------------------------- Status Level I Level II Level III Level IV Level V Level VI - -------------------------------------------------------------------------------- Euro- 0.1750% 0.2250% 0.3000% 0.4125% 0.5000% 0.6250% Dollar Margin - -------------------------------------------------------------------------------- CD Margin 0.3000% 0.3500% 0.4250% 0.5375% 0.6250% 0.7500% - -------------------------------------------------------------------------------- Facility 0.1000% 0.1250% 0.1500% 0.1875% 0.2500% 0.3750% Fee Rate - -------------------------------------------------------------------------------- For purposes of this Schedule, the following terms have the following meanings: "Level I Status" exists at any date if, at such date, the Borrower's senior unsecured long-term debt is rated BBB+ or higher by S&P and Baa1 or higher by Moody's. "Level II Status" exists at any date if, at such date, (i) the Borrower's senior unsecured long-term debt is rated BBB or higher by S&P and Baa2 or higher by Moody's and (ii) Level I Status does not exist. "Level III Status" exists at any date if, at such date, (i) the Borrower's senior unsecured long-term debt is rated BBB- or higher by S&P and Baa3 or higher by Moody's and (ii) neither Level I Status nor Level II Status exists. "Level IV Status" exists at any date if, at such date, (i) the Borrower's senior unsecured long-term debt is either (x) rated BB+ or higher by S&P and Baa3 or higher by Moody's or (y) rated BBB- or higher by S&P and Ba1 or higher by Moody's and (ii) none of Level I Status, Level II Status and Level III Status exists. 2 "Level V Status" exists at any date if, at such date, (i) the Borrower's senior unsecured long-term debt is rated BB+ or higher by S&P and Ba1 or higher by Moody's and (ii) none of Level I Status, Level II Status, Level III Status and Level IV Status exists. "Level VI Status" exists at any date if, at such date, no other Status exists. "Moody's" means Moody's Investors Service, Inc. "S&P" means Standard & Poor's Ratings Services, a division of The McGraw- Hill Companies, Inc. "Status" refers to the determination of which of Level I Status, Level II Status, Level III Status, Level IV Status, Level V Status or Level VI Status exists at any date. The credit ratings to be utilized for purposes of this Schedule are those assigned to the senior unsecured long-term debt securities of the Borrower without third-party credit enhancement, and any rating assigned to any other debt security of the Borrower shall be disregarded. The rating in effect at any date is that in effect at the close of business on such date.