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

Superseding: Seventh Revised Sheet No. 248A

GENERAL TERMS AND CONDITIONS (Continued)

15. BALANCING AND NOMINATION VARIANCE PROCEDURES (Continued)

15.6.1 Requests for all trades and/or confirmation of trades

must be submitted via an acceptable electronic communication

mechanism, as described in Section 8 of these General Terms and

Conditions. After receipt of an Imbalance Trade Confirmation,

Transporter should send the Imbalance Trade Notification to the

initiating trader and the confirming trader no later than noon

(central clock time) the next business day.

15.6.2 Shipper shall have until the close of business on the

third (3rd) business day prior to the end of the month in which

the Eligible Imbalance(s) is required to be cleared to arrange for

an Imbalance Trade transaction, under which all, or any portion

of, such Eligible Imbalance(s) may be traded under a Service

Agreement(s) with any other Shipper(s) on Transporter's system.

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