Northern Natural Gas Company

Fifth Revised Volume No. 1

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Effective Date: 02/21/2009, Docket: RP09-233-000, Status: Effective

Fourth Revised Sheet No. 216 Fourth Revised Sheet No. 216

Superseding: Third Revised Sheet No. 216

GENERAL TERMS AND CONDITIONS

Prior period adjustment time limits will be 6 months from the date of the

initial transportation invoice and 7 months from date of initial sales

invoice with a 3-month rebuttal period, excluding government-required rate

changes. This provision shall not apply in the case of deliberate

omission or misrepresentation or mutual mistake of fact. Parties' other

statutory or contractual rights shall not otherwise be diminished by this

provision.

Should Shipper fail to pay part or all of the amount of any billing for

services rendered or for any other charges hereunder, Northern may impose

interest at the then effective Refund Interest Rate pursuant to the

Commission's Regulations, from the due date until date of payment. If

such failure to pay continues, Northern, in addition to any other remedy

it may have, may suspend or terminate service hereunder after implementing

a notification procedure in accordance with Section 16 of the General

Terms and Conditions.

If the invoice is in dispute, Shipper shall pay the portion not in dispute

and provide documentation identifying the basis for the dispute, and at

any time thereafter within twenty (20) days of a demand made by Northern

for the balance furnishes a good and sufficient surety bond in amount and

with sureties satisfactory to Northern, conditioned upon the payment of

any amounts ultimately found due upon such billing after a final

determination, which may be reached either by agreement or judicial or

administrative proceeding, as the case may be, then Northern shall not be

entitled to suspend or terminate service pursuant to this provision as a

result of said dispute unless and until default is made in the conditions

of such bond.

9. GROUP BILLING

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For the purposes of billing, a Point of Delivery in a specific

service agreement may be defined as a group of physical delivery

points to the same, or affiliated, LDCs in the Market Area or Argus

Zone in the Field Area, including municipally owned/cooperative

distribution companies, where such delivery points are located in a

single Operational Zone.

For purposes of this Section 9, "Affiliated" LDCs are local

distribution companies, including municipalities, (1) which are

divisions of the same corporation, (2) have a common parent company

which owns 100% of the voting stock of the LDCs (either directly or

through another wholly owned subsidiary, (3) wherein one LDC owns

100% of the voting stock of the other company(ies) (either directly

or through another wholly owned subsidiary), or (4) which are

organized as a gas purchasing authority or similarly-structured

group, subject to Northern's reasonable approval.