Northern Natural Gas Company                                            Twelfth Revised Sheet No. 204
FERC Gas Tariff                                                                           Superseding
Fifth Revised Volume No. 1                                         Sub Eleventh Revised Sheet No. 204

                                      GENERAL TERMS AND CONDITIONS

               Former SF Customer.  The term "former SF customer" shall mean a
               customer which is required by Order No. 636 et seq., to convert its SF
               service to TF service.

               Fuel.  The term "Fuel" shall mean the volume of gas used for fuel, use,
               lost and unaccounted for.

               Gas.  The term "gas" shall mean natural gas, manufactured gas,
               propane-air gas or any mixture of hydrocarbons or of hydrocarbons and
               non-combustible gases, in a gaseous state, consisting predominantly of
               methane determined on a MMBtu basis.

               Gas Day.  The term "gas day" shall mean a period of twenty-four (24)
               consecutive hours, beginning and ending at 9:00 a.m. central clock
               time.

               Global Settlement.  The Stipulation and Agreement of Settlement filed
               May 7, 1993 in Docket Nos. RS92-8, RP92-1, et al.

               GS Customers.  Grandfathered GS Customers are those eligible for service
               under Rate Schedule GS-T who were GS sales customers as of May 18, 1992, as
               stated on Appendix C to the Global Settlement and found on Sheet
               No. 510 of this tariff.

               Gulf Coast.  The term "Gulf Coast" will mean the geographical area located
               offshore of the states of Texas and Louisiana.

               Local Distribution Company.  The term "Local Distribution Company" or "LDC"
               shall mean any person, including a municipally owned/cooperative distribution
               company, other than any interstate pipeline or intrastate pipeline, owning
               pipeline facilities for, and engaged in the transportation or local distribution
               of natural gas and the sale of natural gas for ultimate consumption.

               Mainline Receipt Point.  The term "Mainline Receipt Point" shall mean the
               compressor station immediately downstream of gathering facilities or the outlet
               of third party processing plants, or the interconnection with other pipelines.

               Market Area.  In describing the location of Northern's facilities, the term
               "Market Area" shall mean the geographical area located north of the inlet to
               Northern's Clifton Compressor Station in Clay County, Kansas.

               Mcf.  The term "Mcf" shall mean 1,000 cubic feet of gas.

               MDQ.  The term "MDQ" shall mean the total volume of natural gas Northern is
               obligated to transport, under the terms of the applicable Rate Schedule, on a
               daily basis from the Primary Receipt Points to the Primary Delivery Points.
               Unless a Shipper has excess Receipt Point entitlements, Primary Receipt Point
               entitlements and Primary Delivery Point entitlements shall equal.

               MMBtu.  The term "MMBtu" shall mean 1,000,000 Btu.

               Month.  The term "month" or "calendar month" shall mean the period beginning on
               the first "gas day" of the  calendar month following initial delivery and ending
               on the first "gas day" of the next succeeding calendar month.





Issued by: Mary Kay Miller, V.P. Regulatory & Government Affairs
Issued on: January 25, 2006                                             Effective: February 25, 2006