Viking Gas Transmission Company

First Revised Volume No. 1

Effective Date: 07/01/2004, Docket: RP04-306-000, Status: Effective

Second Revised Sheet No. 153 Second Revised Sheet No. 153 : Effective

Superseding: First Revised Sheet Nos. 148 Through 165

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.)

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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.)

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6.1 Public Encryption Key Exchange Procedures:

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

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

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c) Chosen electronic method of key exchange

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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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