Reliant Energy Gas Transmission Company

Fifth Revised Volume No. 1

Effective Date: 09/20/1999, Docket: RP99-473-000, Status: Effective

Original Sheet No. 534 Original Sheet No. 534 : Effective

EXHIBIT ___

ELECTRONIC DATA INTERCHANGE TRADING PARTNER AGREEMENT

DATED ___________________

TO BE EFFECTIVE ____________________ (date)

5. Standards and Industry Guidelines: (Specify all applicable standards, issuing organizations, and

published industry guidelines.)

______________________________________________________________________________________________________

Selected standards include, as applicable, all data dictionaries, segment dictionaries and transmission

controls referenced in those standards for the transaction(s) contained in this Exhibit(s). The mutually

agreed provisions of this Exhibit(s) shall control in the event of any conflict with any listed industry

guidelines.

6. Security Procedures: (Define security procedures, including but not limited to encryption,

authentication, and PGP version.)

______________________________________________________________________________________________________

6.1 Public Encryption Key Exchange Procedures:

a) Contact for public encryption key exchange (emergency and scheduled)

____________________________________________________________________________________________

b) Method of contact and related information (phone number and/or e-mail address)

____________________________________________________________________________________________

c) Chosen electronic method of key exchange

____________________________________________________________________________________________

d) Scheduled public encryption key exchange procedures including frequency

____________________________________________________________________________________________

e) Emergency public encryption key exchange procedures

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f) Verification procedures to confirm appropriate exchange of public encryption keys

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g) Other

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