Northern Border Pipeline Company
FERC Gas Tariff
First Revised Volume No. 1

First Revised Sheet No. 205A
Superseding
Original Sheet No. 205A

                         GENERAL TERMS AND CONDITIONS


  1.  DEFINITIONS (Continued)

        o   The term "Calendar Month" shall mean one of the twelve named 
            divisions of a calendar year according to the Gregorian 
            calendar which shall commence on the first Calendar Day of 
            such Calendar Month and end on the last Calendar Day of such 
            Calendar Month.

        o   The term "calendar year" shall mean the period from 9:00 a.m., 
            Central Clock Time on January 1 of any year to 9:00 a.m., 
            Central Clock Time on January 1 of the next succeeding year.

        o   The term "Ccf" shall mean one hundred cubic feet of natural 
            gas measured at Standard Reference Conditions.

        o   The term "cf" shall mean one cubic foot of natural gas 
            measured at Standard Reference Conditions.

Issued by: Raymond D. Neppl, Vice President
Issued on: November 21, 2006                  Effective on: January 1, 2007
Filed to comply with order of the Federal Energy Regulatory Commission, Docket 
No. RP06-72-000, issued November 21, 2006, 17 FERC ¶ 61,217