1 EXHIBIT 10.3 FIFTH SUPPLEMENT TO PRODUCTION PAYMENT CONVEYANCE THIS FIFTH SUPPLEMENT TO PRODUCTION PAYMENT CONVEYANCE (this "Supplement"), dated as of the date set out at the end hereof, is made by TransTexas Gas Corporation, a Delaware corporation ("Grantor"), Mirant Americas Energy Capital, LP, formerly named Southern Producer Services, L.P. ("SPS"), and TCW DR VI Investment Partnership, L.P. ("Fund VI"). SPS and Fund VI are herein collectively called "Grantee". RECITALS: A. Effective as of March 1, 2000, Grantor executed in favor of Grantee that certain Production Payment Conveyance dated as of March 14, 2000 (as heretofore amended or supplemented, the "Original Conveyance"). The Original Conveyance has been recorded as set forth in Schedule 1 hereto; all capitalized terms used but not defined herein shall have the meanings assigned to them in the Original Conveyance. B. Pursuant to the Original Conveyance, TCW Portfolio No. 1555 DR V Sub-Custody Partnership, L.P. ("Fund V") was originally included within "Grantee". Effective as of December 1, 2000, Fund V assigned all of its right, title, and interest under the Original Conveyance to SPS pursuant to that certain Conveyance of Interest in Production Payment dated as of February 7, 2001. C. Effective as of February 7, 2001, SPS conveyed to Fund VI a 46.10825% undivided interest in and to the Production Payment, resulting in Fund VI now owing an aggregate 49.82233% interest in the Production Payment and SPS now owning a 50.17767% interest in the Production Payment (in each case prior to giving effect to this supplement) D. Grantee and Grantor desire to supplement and amend the Original Conveyance, as set forth herein, to account for the payment by SPS of additional funds to Grantor. E. As described in Section 8.7 of the Original Conveyance, and pursuant to the Purchase Agreement referred to in the Original Conveyance, Fund VI has appointed TCW Asset Management Company to act as its agent in connection with supplements and amendments to the Original Conveyance. SUPPLEMENTS AND AGREEMENTS: FOR A GOOD AND VALUABLE CONSIDERATION, the receipt and sufficiency of which are hereby acknowledged, Grantor and Grantee do hereby agree, act and covenant as follows: 1 2 1. Effective as of 9:00 a.m. Houston, Texas time, on July 9, 2001 (the "Effective Time"), the Original Conveyance is amended in order to add the amount of Fifteen Million Dollars ($15,000,000) to the unliquidated balance of the Primary Sum, as such unliquidated balance stood as of the Effective Time after giving effect to all applications of PP Proceeds made before the Effective Time. After giving effect to such amendment (and to such application of PP Proceeds), the unliquidated balance of the Primary Sum as of the Effective Time is $41,300,111. (Any PP Proceeds received after the Effective Time on July 9, 2001 shall be deemed to have been received on the next following Business Day.) 2. All of the terms and provisions of the Original Conveyance, as the same is amended and supplemented hereby, are ratified, adopted, affirmed and renewed, and remain in full force and effect for the benefit of Grantee, the Beneficiaries, Funds Agent, and their respective successors and assigns. 3. The definition of "Dedication Percentage" in Section 1.1 of the Original Conveyance is hereby amended in its entirety to read as follows: " 'Dedication Percentage' means: (a) fifty percent (50%) from the Initial Time until 9:00 a.m., Texas time, on September 1, 2000; (b) sixty-two percent (62%) from 9:00 a.m., Texas time, on September 1, 2000 until 9:00 a.m., Texas time, on December 1, 2000; (c) thirty percent (30%) from and after 9:00 a.m., Texas time, on December 1, 2000 until 9:00 a.m., Texas time, on August 1, 2001; (d) forty-five percent (45%) from and after 9:00 a.m., Texas time, on August 1, 2001 until 9:00 a.m., Texas time, on November 1, 2001; and (e) seventy percent (70%) from and after 9:00 a.m., Texas time, on November 1, 2001." 4. The definition of "Percentage Share" in Section 1.1 of the Original Conveyance is hereby amended in its entirety to read as follows: " 'Percentage Share' means, with respect to each Person included in Grantee, the fractional undivided interest which it owns in the Production Payment at the time in question. From the initial grant of the Production Payment until June 7, 2000, the Percentage Share of each Person included in Grantee was as follows: Fund V 42.859594% Fund VI 21.429797% SPS 35.710609% 2 3 From and after June 7, 2000, until September 8, 2000, the Percentage Share of each Person included in Grantee was as follows: Fund V 33.048697% Fund VI 16.524349% SPS 50.426954% From and after September 8, 2000, until November 7, 2000, the Percentage Share of each Person included in Grantee was as follows: Fund V 22.863142% Fund VI 11.431571% SPS 65.705287% From and after November 7, 2000, until December 1, 2000, the Percentage Share of each Person included in Grantee was as follows: Fund V 19.08294% Fund VI 9.54147% SPS 71.37559% From and after December 1, 2000, until February 7, 2001, the Percentage Share of each Person included in Grantee was as follows: Fund VI 9.54147% SPS 90.45853% From and after February 7, 2001, until July 9, 2001, the Percentage Share of each Person included in Grantee was as follows: Fund VI 49.82233% SPS 51.17767% As of 9:00 a.m. Houston, Texas time, on July 9, 2001, and thereafter, the Percentage Share of each Person included in Grantee is as follows: Fund VI 31.72711% SPS 68.27289%" The foregoing Percentage Shares of Fund VI and SPS, respectively, taking effect as of July 9, 2001, are in this Amendment called their "amended Percentage Shares". 5. The definition of "Operating Costs" in Section 1.1 of the Conveyance is amended by deleting the phrase "all Direct Taxes," in the second line thereof and by amending the phrase at the end thereof that presently reads "do not include and costs of handling, treating or 3 4 transporting" to read "do not include any Direct Taxes or any costs of handling, treating or transporting". The effect of these amendments is to exclude Direct Taxes from Operating Costs. 6. The definition of "Reimbursable Expenses" in Section 1.1 of the Conveyance is amended by amending the phrase at the beginning thereof that presently reads "means all costs and expenses paid or incurred" to read "means all costs and expenses, other than Operating Costs, that are paid or incurred". The effect of this amendment is to exclude Operating Costs from Reimbursable Expenses. 7. Section 2.2 of the Conveyance is amended by (a) deleting subsection (e) thereof; (b) adding a period at the end of subsection (d) thereof in place of the phrase "; plus"; and (c) changing the reference in the last sentence thereof to "subsections (c), (d) and (e) of this section" to refer instead to "subsections (c) and (d) of this section". Section 2.3 of the Conveyance is amended by changing the reference in subsection (a)(i) thereof to "subsections (b), (c), (d) and (e) of Section 2.2" to refer instead to "subsections (b), (c) and (d) of Section 2.2". The effect of these amendments is to delete Section 2.2(e) of the Conveyance and various references thereto. 8. Section 2.4 of the Conveyance is amended in its entirety to read as follows: Section 2.4. Non-Cost-Bearing Interest. The Production Payment shall be free and clear of, and Grantee shall have no liability for, any Operating Costs or Direct Taxes other than PP Severance Taxes. All Operating Costs and Direct Taxes (other than PP Severance Taxes) shall be borne by the Retained Interests and paid by Grantor promptly, on or before the dates the same become due and owing (except to the extent payment thereof is discharged or the time for payment is extended pursuant to the Bankruptcy Court Order), and Grantor will promptly (and in any event within 10 days after receiving any notice or statement for the same) reimburse Grantee for any Operating Costs or Direct Taxes (other than PP Severance Taxes) that Grantee may elect to pay upon Grantor's failure to do so. In addition, Grantor will promptly (and in any event within 30 days after receiving any notice or statement for the same) pay all Reimbursable Expenses which have been incurred and are unpaid and reimburse Grantee or Beneficiaries for any Reimbursable Expenses which have been paid by Grantee or Beneficiaries. Each amount which is to be paid by Grantor pursuant to this Section 2.4 which is instead paid by Grantee or Beneficiaries shall bear interest at the Agreed Rate on each day from and including the date of such payment until but not including the date repaid by Grantor. 9. Section 3.1(b) of the Conveyance is amended in its entirety to read as follows: (b) promptly pay all Operating Costs and Direct Taxes (other than PP Severance Taxes) with respect to the Subject Interests (except to the extent that (i) Grantor is contesting any such Operating Costs or Direct Taxes in good faith by appropriate proceedings, (ii) Grantor has reserved adequate funds for the payment thereof, and (iii) if any such Operating Costs or Direct Taxes are owed to any lessor of any lease under which any of the Subject Interests are held, failure to win such contest would not result in termination or cancellation of such lease); 4 5 10. In consideration of the additional purchase price payment made by SPS to Grantor and the foregoing increase in the unliquidated balance of the Primary Sum: (a) Fund VI does hereby GRANT, BARGAIN, SELL, CONVEY, ASSIGN, TRANSFER, SET OVER and DELIVER unto SPS such additional undivided interests in the Production Payment as are necessary in order to cause SPS and Fund VI to own the Production Payment, at and after the Effective Time, in undivided interests in proportion to their respective amended Percentage Shares, and (b) Fund VI does further assign unto SPS such undivided interests in SPS's accounts receivable from the sale of PP Hydrocarbons - to the extent such accounts receivable exist and are unpaid at the Effective Time and arise from the sale of PP Hydrocarbons before the Effective Time - as are necessary in order to cause SPS and Fund VI to share in all collections of such accounts receivable after the Effective Time in proportion to their respective amended Percentage Shares. TO HAVE AND TO HOLD the same, upon and subject to the terms of the Original Conveyance, as amended hereby, unto SPS and its successors and Permitted Assigns, until the Termination Time. 11. All of the terms and provisions of the Original Conveyance, as the same is amended and supplemented hereby, are ratified, adopted, affirmed and renewed, and remain in full force and effect for the benefit of Grantee, the Beneficiaries, Funds Agent, and their respective successors and assigns. 12. This Supplement may be executed in multiple counterparts, all of which are identical. 13. This Supplement shall be binding upon and shall inure to the benefit of the parties hereto, and their respective successors and assigns, and all of the covenants and agreements contained in the Original Conveyance, as amended hereby, shall be deemed to be covenants and agreements running with the lands affected thereby. 14. This Supplement shall be governed by and construed in accordance with the laws of the State of Texas, without regard to principles of conflicts of laws. 5 6 IN WITNESS WHEREOF, this Supplement is executed by the parties hereto on the dates set out below in their respective acknowledgments, but effective as of the Effective Time. TRANSTEXAS GAS CORPORATION By: ------------------------------------- Simon Ward Vice President and Treasurer Grantor's address: 1300 North Sam Houston Parkway East Suite 310 Houston, Texas 77032-2949 Attention: Ed Donahue, Vice President Telephone: 281/987-8600 Telecopy: 281/986-8865 MIRANT AMERICAS ENERGY CAPITAL, LP By: Mirant Americas Development, Inc., its general partner By: ------------------------------------- John A. Rigas Attorney-in-Fact SPS's address: 1200 Smith Street Suite 2890 Houston, Texas 77002 Attention: David W. Stewart Telephone: 713/276-1902 Telecopy: 713/276-1990 6 7 TCW DR VI INVESTMENT PARTNERSHIP, L.P. By: TCW ASSET MANAGEMENT COMPANY, as Agent By: -------------------------------------- Kurt A. Talbot Senior Vice President Fund VI's address: c/o Trust Company of the West 865 South Figueroa Los Angeles, California 90017 Attention: Thomas F. Mehlberg Telephone: 213/244-0702 Telecopy: 213/244-0604 This document prepared by: John W. Rain Thompson & Knight L.L.P. 1700 Pacific Avenue, Suite 3300 Dallas, Texas 75201 7 8 STATE OF TEXAS ) ) COUNTY OF HARRIS ) The foregoing instrument was acknowledged before me on this ___ day of July, 2001, by Simon Ward, the Vice President and Treasurer of TransTexas Gas Corporation, a Delaware corporation, on behalf of such corporation. ----------------------------------------- [SEAL] Notary Public, State of Texas STATE OF TEXAS ) ) COUNTY OF HARRIS ) The foregoing instrument was acknowledged before me on this ___ day of July, 2001, by John A. Rigas, the Attorney-in-Fact of Mirant Americas Development, Inc., a Georgia corporation, on behalf of such corporation acting as general partner of Mirant Americas Energy Capital, LP, a Delaware limited partnership, and on behalf of such limited partnership. ----------------------------------------- [SEAL] Notary Public, State of Texas STATE OF TEXAS ) ) COUNTY OF HARRIS ) The foregoing instrument was acknowledged before me on this ___ day of July, 2001, by Kurt A. Talbot, the Senior Vice President of TCW Asset Management Company, a California corporation, on behalf of such corporation acting as agent as aforesaid. ----------------------------------------- [SEAL] Notary Public, State of Texas 8 9 SCHEDULE 1 RECORDING SCHEDULE 1. Production Payment Conveyance among TCW Portfolio No. 1555 DR V Sub-Custody Partnership, L.P., TCW DR VI Investment Partnership, L.P., Southern Producer Services, L.P. and TransTexas Gas Corporation. <Table> <Caption> Recording Jurisdiction Recording Data ---------------------- -------------- Calhoun County, TX Volume 262, Page 33, Filed 9/19/2000 Chambers County, TX Document No. 00-448-604, Filed 3/17/2000 Galveston County, TX Film Code #014-39-1028, Filed 3/17/2000 Jim Hogg County, TX Volume 17, Page 362, Filed 3/20/2000 Live Oak County, TX Volume 449, Page 135, Filed 3/20/2000 Wharton County, TX Volume 360, Page 596, Filed 3/17/2000 Zapata County, TX Volume 629, Page 471, Filed 3/17/2000 General Land Office of Texas Sent for filing </Table> 2. First Supplement to Production Payment Conveyance among TransTexas Gas Corporation, Southern Producer Services, L.P., TCW Portfolio No. 1555 DR V Sub-Custody Partnership, L.P. and TCW DR VI Investment Partnership, L.P. 1 10 <Table> Recording Jurisdiction Recording Data ---------------------- -------------- Calhoun County, TX Volume 262, Page 114, Filed 9/19/2000 Chambers County, TX Document No. 00-459-630 Filed 6/9/2000 Galveston County, TX Film Code 014-62-1617 Filed 6/9/2000 Jim Hogg County, TX Volume 19, Page 526, Filed 6/9/2000 Live Oak County, TX Volume 450, Page 428, Filed 6/12/2000 Wharton County, TX Volume 371, Page 458, Filed 6/9/2000 Zapata County, TX Volume 634, Page 110, Filed 6/9/2000 </Table> 3. Second Supplement to Production Payment Conveyance among TransTexas Gas Corporation, Southern Producer Services, L.P., TCW Portfolio No. 1555 DR V Sub-Custody Partnership, L.P. and TCW DR VI Investment Partnership, L.P. <Table> <Caption> Recording Jurisdiction Recording Data ---------------------- -------------- Calhoun County, TX Volume 262, Page 132 Filed 9/19/2000 Chambers County, TX Document No. 00-470-562 Filed 9/18/2000 Galveston County, TX File Number 2000046945 Filed 9/15/2000 Jim Hogg County, TX File Number 65210 Filed 9/22/2000 Live Oak County, TX File Number 00149214 Filed 9/19/2000 Wharton County, TX Volume 383, Page 740, Filed 9/19/2000 </Table> 2 11 <Table> Zapata County, TX Volume 638, Page 642, Filed 9/22/2000 </Table> 4. Third Supplement to Production Payment Conveyance among TransTexas Gas Corporation, Southern Producer Services, L.P., TCW Portfolio No. 1555 DR V Sub-Custody Partnership, L.P. and TCW DR VI Investment Partnership, L.P. <Table> <Caption> Recording Jurisdiction Recording Data ---------------------- -------------- Calhoun County, TX Volume 266, Page 205, Filed 11/13/00 Chambers County, TX Document No. 00-477-116, Filed 11/14/00 Galveston County, TX Film Code 015-08-1029 Filed 11/13/00 Jim Hogg County, TX Volume 22, Page 256, Filed 11/13/00 Live Oak County, TX Volume 454, Page 239, Filed 11/14/00 Wharton County, TX Volume 390, Page 480, Filed 11/13/00 Zapata County, TX Volume 641, Page 169, Filed 11/13/00 General Land Office of Texas Filed 12/22/00 </Table> 5. Fourth Supplement to Production Payment Conveyance among TransTexas Gas Corporation, Mirant Americas Energy Capital, LP, formerly named Southern Producer Services, L.P., and TCW DR VI Investment Partnership, L.P. <Table> <Caption> Recording Jurisdiction Recording Data ---------------------- -------------- Calhoun County, TX Volume 272, Page 114, Filed 2/12/01 Chambers County, TX Document No. 01-486-620 Filed 2/12/01 </Table> 3 12 <Table> Galveston County, TX Film Code 015-31-0563 Filed 2/12/01 Jim Hogg County, TX Volume 23, Page 769, Filed 2/12/01 Live Oak County, TX Volume 456, Page 400, Filed 2/12/01 Wharton County, TX Volume 400, Page 418, Filed 2/12/01 Zapata County, TX Volume 645, Page 328, Filed 2/12/01 General Land Office of Texas Filed </Table> 4