EXHIBIT 10c AMENDATORY AGREEMENT This Amendment is entered into this 1st day of March, 1995, between SOUTHERN NATURAL GAS COMPANY ("Company") and ATLANTA GAS LIGHT COMPANY ("Shipper"). W I T N E S S E T H: WHEREAS, Company and Shipper are parties to a firm transportation agreement dated September 1, 1994, (#902470) for 100,000 Mcf per day ("September FT Agreement"), a firm transportation agreement dated November 1, 1994, (#904460) for 259,812 Mcf per day ("November FT Agreement"), a firm transportation-no notice agreement dated November 1, 1994, (#904461) for 406,222 Mcf per day ("FT-NN Agreement"), and a contract storage service agreement dated November 1, 1994, (#S20150) for 20,117,674 Mcf ("CSS Agreement"); and WHEREAS, Shipper has agreed to support the Stipulation and Agreement filed by Company in Docket Nos. RP89-224, et al, on March 15, 1995 ("Stipulation"); and WHEREAS, under the terms of the Stipulation, Company has agreed to discount Shipper's rates and charges under the September FT Agreement and Shipper has agreed to extend the primary terms of the September FT Agreement, the November FT Agreement, the FT-NN Agreement and the CSS Agreement, all as more specifically provided herein; NOW THEREFORE, in consideration for the premises and the mutual promises and covenants contained herein, the parties agree as follows: 1. Section 4.1 of the September FT Agreement, FT-NN Agreement and CSS Agreement, respectively, shall be deleted in their entirety and the following Section 4.1 substituted therefor in each agreement: 4.1 Subject to the provisions hereof, this Agreement shall become effective as of the date first hereinabove written and shall be in full force and effect for a primary term through February 28, 1998, and shall continue and remain in force and effect for successive terms of one year each thereafter if the parties mutually agree in writing to each such yearly extension at least 60 days prior to the end of the primary term or any subsequent yearly extension. Amendatory Agreement 2. Section 4.1 of the November FT Agreement shall be deleted in its entirety and the following Section 4.1 substituted therefor: 4.1 Subject to the provisions hereof, this Agreement shall become effective as of the date first hereinabove written and shall be in full force and effect for a primary term through the following dates: (a) April 30, 2007 for 114,905 Mcf per day of Transportation Demand, and June 30, 2007 for 1,000 Mcf per day of Transportation Demand, and shall continue and remain in force and effect for successive terms of one year each after the end of each primary term for the specified volume, unless and until cancelled with respect to the associated volume by either party giving 180 days written notice to the other party prior to the end of the specified primary term or any yearly extension thereof; and (b) February 28, 1998, for 143,907 Mcf per day of Transportation Demand, and shall continue and remain in force and effect for successive terms of one year each thereafter if the parties mutually agree in writing to each such yearly extension at least 60 days prior to the end of the primary term or subsequent yearly extension. 3. The current Exhibit E to the September FT Agreement shall be deleted in its entirety and the 1st Revised Exhibit E attached hereto effective March 1, 1995, shall be substituted therefor. 4. This Amendment is conditioned on the Stipulation becoming effective as provided in Article XVIII thereof and the Stipulation not otherwise being terminated pursuant to its terms. If the Stipulation does not become effective or if it terminates pursuant to its terms, then either party may give prior written notice to the other party to (a) reinstate the primary term and Exhibit E which were in effect under the September FT Agreement prior to the date of this Amendment, and (b) amend Section 4.1 of the November FT Agreement, the FT-NN Agreement, and the CSS agreement to provide that the respective primary terms under such agreements which were extended herein through February 28, 1998, shall extend through the later of October 31, 1995, or ninety (90) days after the date that the Stipulation terminates. Within fifteen (15) days after the Stipulation terminates, the parties shall execute any documents necessary to effectuate the foregoing provision. If the Stipulation becomes effective, then within fifteen (15) days after such effective date, the parties shall execute such other amendments to the firm transportation service agreements provided for in paragraph 1(b) of Article XV of the Stipulation. Amendatory Agreement 5. As provided in paragraph 2(a) of Article IV of the Stipulation, this amendment is subject to the provisions of Articles III, paragraph 4 and XII, paragraph 5 of the Stipulation. 6. Except as provided herein, the September FT Agreement, the November FT Agreement, the FT-NN Agreement and the CSS Agreement shall remain in full force and effect as written. 7. This Amendment is subject to all applicable, valid laws, orders, rules and regulations of any governmental entity having jurisdiction over the parties or the subject matter hereof. WHEREFORE, the parties have executed this Amendment through their duly authorized representatives to be effective as of the date first written above. ATTEST: SOUTHERN NATURAL GAS COMPANY By: /s/ illegible signature By: /s/ Joel Anderson ___________________________ ___________________________ Title: Secretary Title: Vice President _________________________ _________________________ ATTEST: ATLANTA GAS LIGHT COMPANY By: /s/ Melanie M. Platt By: /s/ Stephen J. Gunther ___________________________ ___________________________ Title: Corporate Secretary Title: Vice President _________________________ _________________________ Service Agreement No. 902470 FIRST REVISED EXHIBIT E DISCOUNT INFORMATION Discounted Rates: (1) The Reservation Charge under this Agreement shall be $10.50/Mcf; (2) The applicable GSR Cost Surcharge and GSR Volumetric Surcharge shall be capped at 50% each; (3) All other surcharges shall be assessed at full rate under this Agreement. Discounted Rate Effective from 3/1/95 to 2/28/98, subject to the termination provisions of the Amendatory Agreement between the parties dated March 1, 1995, pursuant to which this revised Exhibit E was established. /s/ Stephen J. Gunther /s/ Joel Anderson _________________________ ____________________________ ATLANTA GAS LIGHT COMPANY SOUTHERN NATURAL GAS COMPANY