Northern Natural Gas Company

Fifth Revised Volume No. 1

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Effective Date: 10/01/2002, Docket: RP02-451-000, Status: Effective

Fifth Revised Sheet No. 257 Fifth Revised Sheet No. 257 : Effective

Superseding: Fourth Revised Sheet No. 257

GENERAL TERMS AND CONDITIONS

28. NOMINATIONS

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Shipper and Northern shall agree to the following minimum North American

Energy Standards Board (NAESB) (formerly Gas Industry Standards Board (GISB))

standard nomination timeline communicated electronically under each

Throughput Service Agreement for transportation that will occur on Northern:

o The Timely Nomination Cycle: 11:30 a.m. for nominations leaving control

of the nominating party; 11:45 a.m. for receipt of nominations by

Northern (including the Title Transfer Tracking Service Providers

(TTTSPs)); noon to send Quick Response; 3:30 p.m. for receipt of

completed confirmations by Northern from upstream and downstream

connected parties; 4:30 p.m. for receipt of scheduled quantities by

shipper and point operator (central clock time on the day prior to

flow).

o The Evening Nomination Cycle: 6:00 p.m. for nomination leaving control

of the nominating party; 6:15 p.m. for receipt of nominations by

Northern (including the TTTSPs); 6:30 p.m. to send Quick Response;

9:00 p.m. for receipt of completed confirmations by Northern from

upstream and downstream connected parties; 10:00 p.m. for Northern to

provide scheduled quantities to affected shippers and point operators,

and to provide scheduled quantities to bumped parties (notice to bumped

parties), (central clock time on the day prior to flow). Scheduled

quantities resulting from an Evening Nomination that does not cause

another Service Requester on Northern to receive notice that it is being

bumped should be effective at 9:00 a.m. on gas day; and when an Evening

Nomination causes another Service Requester on Northern to receive

notice that it is being bumped, the scheduled quantities should be

effective at 9:00 a.m. on gas day.

o The Intraday 1 Nominations Cycle: 10:00 a.m. for nominations leaving

control of the nominating party: 10:15 a.m. for receipt of nominations

by Northern (including the TTTSPs); 10:30 a.m. to send Quick Response;

1:00 p.m. for receipt of completed confirmations by Northern from

upstream and downstream connected parties; 2:00 p.m. for Northern to

provide scheduled quantities to affected shippers and point operators,

and to provide scheduled quantities to bumped parties (notice to bumped

parties), (central clock time on the gas day). Scheduled quantities

resulting from Intraday 1 Nominations should be effective at 5:00 p.m.

gas day.

o The Intraday 2 Nomination Cycle: 5:00 p.m. for nominations leaving

control of the nominating party; 5:15 p.m. for receipt of nominations by

Northern (including the TTTSPs); 5:30 p.m. to send Quick Response;

8:00 p.m. for receipt of completed confirmations by Northern from

upstream and downstream connected parties; 9:00 p.m. for Northern to

provide scheduled quantities to affected shippers and point operators

(central clock time on the gas day). Scheduled quantities resulting

from Intraday 2 Nominations should be effective at 9:00 p.m. on gas day.

Bumping is not allowed during the Intraday 2 Nomination Cycle.

For purposes of the Evening, Intraday 1 and Intraday 2 Nomination

Cycles, "provide" shall mean, for transmittals pursuant to standards

1.4.x, receipt at the designated site, and for purposes of other forms

of transmittal, it shall mean send or post.

The Timely and Evening Nomination Cycles pertain to transportation for the

upcoming gas day. The Intraday 1 and Intraday 2 Nomination Cycles pertain to

the current gas day. Together the Timely, Evening, Intraday 1 and Intraday 2

Nomination Cycles shall be referred to as the grid-wide synchronization

times. Northern will process nominations in addition to the grid-wide

synchronization times subject to the additional Intraday nomination

subsection herein, and accordingly Northern is not required to hold capacity

for grid-wide nominations until a standard nomination cycle. Bumping will

only be permitted during the Evening and Intraday 1 Nomination Cycles.