Northern Border Pipeline Company

First Revised Volume No. 1

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Effective Date: 06/01/2001, Docket: RP01-388-000, Status: Effective

First Revised Sheet Number 259A First Revised Sheet Number 259A : Effective

Superseding: Original Sheet Number 259A

GENERAL TERMS AND CONDITIONS

10. NOMINATIONS/CONFIRMATIONS/SCHEDULING/INTERRUPTION OF SERVICE

(Continued)

10.6 Interruption of Service

Company shall at all times attempt to operate, or cause to

be operated, its pipeline system in a manner designed to

make possible, as nearly as practicable, continuous receipt

of gas from, and delivery of gas to, Shipper in the

respective quantities provided for in Shipper's Agreement.

10.61 Full Interruption of Service

A full interruption of service occurs when all or a

portion of Company's pipeline system capacity

(mainline and/or point) is unavailable for

scheduling as a result of force majeure or

non-routine maintenance, repairs, and/or cause,

whether similar or dissimilar. All capacity shall

be interrupted within the affected portion of

Company's pipeline system.

10.62 Partial Curtailment of Service

A partial curtailment of service occurs when

Company's pipeline system capacity (mainline and/or

point) is reduced as a result of force majeure or

non-routine maintenance, repairs, and/or other

cause, whether similar or dissimilar.

Reduced capacity shall, during the period of the

restriction, be curtailed within the affected

portion of Company's pipeline system capacity first

to the last priority classification scheduled

pursuant to the capacity priority queue as detailed

in Subsection 10.42 hereof, and the sequentially in

reverse order.