Williston Basin Interstate Pipeline Co.

Second Revised Volume No. 1

Effective Date: 06/01/1997, Docket: RP97-148-002, Status: Effective

First Revised Sheet No. 284 First Revised Sheet No. 284 : Effective

Superseding: Original Sheet No. 284

GENERAL TERMS AND CONDITIONS (Continued)

19. BILLINGS (Continued)

required by Transporter to prepare invoices, Shipper shall cause

such information to be received by Transporter on or before the

fifth (5) business day of the month immediately following the

month to which the information applies.

19.1.1 For reporting measurement prior period adjustments, such

will be reported with the restated line item and new total

quantity for the specific day and the specific month.

19.1.2 Missing or late measurement data will be estimated and

actuals will be treated as a prior period adjustment, with

the measuring party to provide the estimate.

19.2 Right of examination: Both Transporter and Shipper shall have the

right to examine, at any reasonable time, the books, records and

charts of the other to the extent necessary to verify the accuracy

of any statement, chart or computation made under or pursuant to

the provisions of the Service Agreement.

19.3 More than one Shipper: When two or more persons constitute

Shipper under one Service Agreement, except as may otherwise be

agreed, Shipper shall designate a single person who shall be

rendered the bill and who shall be responsible for payment of all

charges. Such billing shall not affect the joint and several

obligations of all such persons under such Service Agreement.

19.4 Commodity Billing Unit: Commodity and injection and withdrawal

billing units for gas hereunder, except as noted in Subsection

19.5, shall be one dkt.

19.5 MDDQ, MSDQ, MSCQ and Interruptible Storage Capacity Billing Units:

The billing units for the foregoing named charges applicable to

gas service hereunder shall be one equivalent dkt.

20. TAXES

20.1 Shipper shall pay or cause to be paid all taxes and assessments

imposed on Shipper with respect to natural gas transported prior

to and including its delivery to Transporter, and all taxes and

assessments imposed on Shipper with respect to natural gas stored