Northern Border Pipeline Company

First Revised Volume No. 1

Effective Date: 06/01/2003, Docket: RP00-403-004, Status: Effective

Substitute First Revised Sheet No. 260C Substitute First Revised Sheet No. 260C : Effective

Superseding: Original Sheet No. 260C

GENERAL TERMS AND CONDITIONS

10. NOMINATIONS/CONFIRMATIONS/SCHEDULING/INTERRUPTION OF SERVICE

(Continued)

10.6 Interruption of Service (Continued)

10.63 Service Reduction Due to an Operational Flow Order

(Continued)

An OFO can be issued to effect either the

curtailment of interruptible services and/or the

forced balancing of nominations and actual

flows, such that receipts and deliveries fall

within the tolerance level designated within the

OFO watch, or that gas is received and delivered

in uniform hourly quantities during the Gas Day.

Company shall not issue an OFO to Forwardhaul

Shippers to create displacement capacity for

Backhaul service.

(e) Shipper Compliance

The Shipper shall make a good faith effort to

comply with any such OFO, including seeking

waivers of any contractual limits with third

parties or modifications of operating conditions

on third party systems. However, Shipper cannot

be required by Company to physically transport

gas quantities to alleviate an OFO condition.

(f) Treatment of Shipper Imbalances

At the time an OFO is issued, affected Shippers

will be notified of any imbalances that require

immediate resolution pursuant to one of

Company's imbalance resolution methods as

detailed in Subsection 23.32 of the General

Terms and Conditions of this Gas Tariff.

Due to the immediate corrective nature of the

OFO, the 45-day imbalance correction period

discussed in Subsection 23.32 does not apply.

Quantities parked and loaned under Rate Schedule

PAL may be utilized by Shipper to net or trade

against to facilitate the immediate elimination

of imbalances.