Gulf States Transmission Corporation

Original Volume No. 1

Effective Date: 08/01/1998, Docket: GT98- 78-000, Status: Effective

First Revised Sheet No. 78 First Revised Sheet No. 78 : Effective

Superseding: Original Sheet No. 78

EXHIBIT 1

ELECTRONIC DATA INTERCHANGE TRADING PARTNER AGREEMENT

between ________________________________

and ___________________________________

DATED _____________

TO BE EFFECTIVE _____________ (DATE)

COVERING TRANSACTION SET NUMBER ________

1. DOCUMENT SPECIFIC OPERATING INFORMATION:

(This section covers only the originating Document and its Functional

Acknowledgment or identification and timing of substitute Response Document.)

NATURAL GAS DOCUMENT NAME _______________________________

ASC X12 VERSION RELEASE NO. _______________________________

ROW ORIGINATING RECEIVING

NUM ITEMS PARTY PARTY

1 COMPANY NAME

2 EDI COMMUNICATION PHONE NUMBER

3 THIRD PARTY SERVICE PROVIDER NAME

4 RECEIPT COMPUTER

5 ISA QUALIFIER

6 ISA ID CODE

7 GS ID CODE

8 FUNCTIONAL 997 DOCUMENT

ACKNOWLEDGMENT (FA) (Y/N) N/A

9 FA RETURN TIME FRAME N/A

10 RESPONSE DOCUMENT (RSP)

NUMBER/NAME N/A

11 FUNCTIONAL ACKNOWLEDGMENT OF

RESPONSE N/A

12 RSP RETURN TIME FRAME N/A

13 ACCEPTANCE DOCUMENT (ACPT) N/A

14 FUNCTIONAL ACKNOWLEDGMENT OF

ACCEPTANCE N/A N/A

15 ACPT RETURN TIME FRAME N/A

16 RETRANSMIT TIME FRAME

(ORIGINAL DOCUMENT) N/A N/A

17 SIGNATURE CODE