Centra Pipelines Minnesota Inc.

Second Revised Volume No. 2

Effective Date: 10/16/1991, Docket: RP91-136-002, Status: Effective

Original Sheet No. 16 Original Sheet No. 16 : Effective

6.2 On or before the tenth (10th) day of each month Centra shall

render to Shipper a statement for the preceding month showing

the daily and total amount of gas received and redelivered, the

amount due thereunder, and information sufficient to explain and

support any adjustments made in determining such charges. On

the twentieth (20th) day of each month the amount so billed shall

become due and payable. If presentation of a statement by Centra

is delayed after the tenth (10th) day of the month, then the time

for payment shall be extended correspondingly unless Shipper is

responsible for such delay. All payments under this Rate Schedule

shall be made in United States dollars by wire transfer of funds on

the date due as specified in relevant Transportation Service

Agreement.

6.3 Interest on any overdue amount shall accrue at a rate of 1% over

the prime rate of the bank denominated in Shipper's Service

Agreement for the period. If such default comes sixty (60) days

after written notice from Centra to Shipper, Centra may suspend

transportation hereunder without prejudice to other remedies.

6.4 If any overcharge or undercharge occurring within the previous

twelve (12) months is identified by either party it shall on proper