Williston Basin Interstate Pipeline Co.

Second Revised Volume No. 1

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Effective Date: 10/01/2002, Docket: RP02-483-000, Status: Effective

Eighth Revised Sheet No. 248 Eighth Revised Sheet No. 248 : Effective

Superseding: Seventh Revised Sheet No. 248

GENERAL TERMS AND CONDITIONS (Continued)

15. BALANCING AND NOMINATION VARIANCE PROCEDURES (Continued)

15.6 Imbalance Trading: For purposes of this Subsection 15.6,

Imbalance Trading shall be applicable to all imbalance gas originating

as described in Subsection 15.1 (Eligible Imbalances). Trading of

Eligible Imbalances will be allowed to the extent that the Shipper

initiating such trade agrees to reimburse Transporter to the extent that

Transporter recovers less transportation revenue resulting from such

trading than would otherwise have been received.

(The rest of this sheet has been intentionally left blank.)