Centra Pipelines Minnesota Inc.

Second Revised Volume No. 2

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

Original Sheet No. 22 Original Sheet No. 22 : Effective

9.2 Shipper, Centra Transmission Holdings Inc. and any Seller of gas

to Shipper designated by Shipper as a representative shall have the

right to be present at the time of any installing, reading, cleaning,

changing, repairing, inspecting, testing, calibrating or adjustment

done in connection with the equipment used in measuring or

checking the measurement of deliveries of gas under Shipper's

Transportation Agreement. The records from such measuring

equipment shall remain the property of Centra, but upon request

Centra will submit to Shipper copies of its records and charts,

together with calculations therefrom.

9.3 Any replacement meters or additional meters or measuring

equipment applying to or affecting deliveries of gas hereunder shall

be made in such manner so as to permit an accurate determination

of the accuracy of measurement and shall conform to the

requirements of Shippers Transportation Agreement. Care shall

be exercised by both parties in the installation, maintenance and

operation of pressure regulating equipment so as to prevent any

inaccuracy in the determination of the volumes of gas delivered.

9.4 The accuracy of the measuring equipment used for billing purposes

hereunder shall be verified by Centra at least once every 3 months