Mississippi River Transmission Corp.

Original Volume No. 1-A

Effective Date: 02/01/1990, Docket: GT90- 12-000, Status: Effective

First Revised Sheet No. 43 First Revised Sheet No. 43 : Effective

Superseding: Original Sheet No. 43

TRANSPORTATION

GENERAL TERMS AND CONDITIONS

(Continued)

4. MEASUREMENT PROCEDURES (Continued)

any measuring equipment found to be inaccurate so that the registration

thereof will be accurate. Each party agrees to give the other

reasonable notice of such tests so that if the other party desires it

may have its representatives present.

Moreover, each party shall have the right, at any time, to

challenge the accuracy of any measuring equipment used hereunder and,

when so challenged, the equipment shall be tested by the party

operating the challenged equipment. If, upon testing, the challenged

equipment is found to be in error, then it shall be repaired and

calibrated. The cost of any such special testing, repair and

calibration shall be borne by the party requesting the special test if

the percentage of inaccuracy is found to be two percent (2%) or less;

otherwise, the cost shall be borne by the party operating the

challenged measuring equipment.

If upon any test of the measuring facilities the percentage

of inaccuracy exceeds two percent (2%), then the registrations thereof

shall be corrected for a period extending back in time to the beginning

of the inaccuracy, if such time is ascertainable, and if not

ascertainable, then the registrations thereof shall be corrected back

one-half (1/2) of the time elapsed since the last date of calibration;

however, in no event shall the registrations be corrected for a period

extending back in time more than sixteen (16) days.

In the event that the amount of gas delivered and/or

redelivered hereunder cannot be reasonably ascertained or computed from

the measuring equipment, then the volume of the gas received and/or

delivered, as applicable, during such period shall be determined by

using the registration of any check meter or meters, if installed and

accurately registering; or by estimating the quantity of gas on the

basis of past receipts and/or deliveries, whichever is applicable, made

hereunder during periods when similar conditions existed and the meter

was registering accurately.