El Paso Natural Gas Company

Second Revised Volume No. 1A

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Effective Date: 07/09/1997, Docket: RP97- 20-007, Status: Effective

Original Sheet No. 455 Original Sheet No. 455 : Effective

APPENDIX

ELECTRONIC DATA INTERCHANGE TRADING PARTNER AGREEMENT

between ______________________________

and _________________________________________________

DATE ____________

TO BE EFFECTIVE ____________ (DATE)

RECEIPT COMPUTER:

COMPANY NAME: _________________________________________________

INTERNET ADDRESS (URL) _________________________________________________

ISA QUALIFIER _________________________________________________

ISA ID _________________________________________________

FOR PUBLIC KEY CHANGES OR EMERGENCY KEY VERIFICATION:

CONTACT NAME: _________________________________________________

E-MAIL ADDRESS: _________________________________________________

PHONE NUMBER: _________________________________________________

COMPANY NAME: _________________________________________________

INTERNET ADDRESS (URL) _________________________________________________

ISA QUALIFIER _________________________________________________

ISA ID _________________________________________________

FOR PUBLIC KEY CHANGES OR EMERGENCY KEY VERIFICATION:

CONTACT NAME: _________________________________________________

E-MAIL ADDRESS: _________________________________________________

PHONE NUMBER: _________________________________________________

2. STANDARDS: __________________________________________

3. INDUSTRY GUIDELINE: __________________________________________

The mutually agreed provisions of this Exhibit shall control in

the event of any conflict with any listed industry guidelines.

4. SECURITY PROCEDURES: __________________________________________

5. TERMS AND CONDITIONS: __________________________________________

6. DATA RETENTION: __________________________________________

7. REFERENCED AGREEMENTS: __________________________________________

8. LIMITATION ON DIRECT DAMAGES: __________________________________________

9. CONFIDENTIAL INFORMATION: __________________________________________