Northern Border Pipeline Company

First Revised Volume No. 1

Effective Date: 10/01/1993, Docket: RS92- 67-003, Status: Effective

Original Sheet Number 228 Original Sheet Number 228 : Effective

GENERAL TERMS AND CONDITIONS

3. MEASURING EQUIPMENT (Continued)

3.6 Correction and Adjustment

If, upon test, any measuring equipment is found to be

registering inaccurately by not more than two percent, at a

reading corresponding to the average hourly rate of flow,

then readings of such equipment since the time of the last

test thereof shall be considered accurate in computing

deliveries of gas. If, upon test, any measuring equipment

is found to be registering inaccurately by more than two

percent, at a reading corresponding to the average hourly

rate of flow, then readings of such equipment shall be

corrected to zero error for any past period definitely

known, or agreed, to have been inaccurate, or if the

inaccuracy during all or part of the period of time since

the last test of such equipment is not so known or agreed

upon, for a period of sixteen days, or one-half of the

elapsed time since such last test, whichever is the shorter

period. Any recording equipment found to be registering

inaccurately shall be immediately adjusted to register

accurately.

3.7 Failure of Measuring Equipment

If Company's measuring equipment at any Point of Receipt or

Point of Delivery of a Shipper is out of service for any

period, the measurement determinants for such Point of

Receipt or Point of Delivery during such period shall be

determined:

3.71 By using the data recorded by any check measuring

equipment accurately registering; or

3.72 If such check measuring equipment is not registering

accurately but the percentage of error is

ascertainable by a calibration test, by using the

data recorded, corrected to zero error; or