Northern Border Pipeline Company

First Revised Volume No. 1

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Effective Date: 03/22/2010, Docket: RP10-385-000, Status: Effective

Sixth Revised Sheet No. 250A Sixth Revised Sheet No. 250A

Superseding: Substitute Fifth Revised Sheet No. 250A

GENERAL TERMS AND CONDITIONS

10. NOMINATIONS/CONFIRMATIONS/SCHEDULING/INTERRUPTION OF SERVICE

(Continued)

10.4 Capacity Allocation and Confirmation Process (Continued)

10.41 Allocation of Constrained Pipeline Capacity

(Continued)

(e) Rate Schedule IT-1 interruptible nominations.

Company shall prioritize nominations within

this nomination class on the basis that the

Shipper paying the higher interruptible

transportation rate shall receive a higher

queue position than those paying a lower

interruptible transportation rate.

Pro rata allocation of capacity within this

nomination class, if necessary, will be based

on Shipper's validated nomination quantity.

10.42 Allocation of Point Capacity

In those instances in which the aggregate net

quantity of all validated nominations exceed

Company's physical capacity to receive gas at a

specific Point of Receipt or deliver gas at a

specific Point of Delivery, Company will allocate

capacity to the validated nominations at the

constrained point location in the following order:

(a) Primary scheduling rights firm nominations.

Pro rata allocation of capacity within this

nomination class, if necessary, will be based

on Shipper's primary scheduling rights at such

location.