Black Marlin Pipeline Company

First Revised Volume No. 1

Effective Date: 11/01/2002, Docket: RP02-568-001, Status: Effective

Substitute Original Sheet No. 224 Substitute Original Sheet No. 224 : Effective

Superseding: Original Sheet No. 224

f. If Natural Gas Intelligence ceases publication of the spot prices prescribed in

Sections 21.2.d and 21.2.e above, Transporter will file a substitute index with the

Commission within thirty (30) days after the prescribed spot prices become

unavailable, and the substitute spot prices will be used for all cash-outs effective

as of the date the prescribed spot prices became unavailable for establishing a

cash-out price.

21.3 Managing Imbalances

Transporter shall endeavor to provide operational data to Shipper on Transporter's internet

website within five (5) working days after the day of gas flow in an effort to assist

Shipper in managing any imbalances that may occur between gas receipts and deliveries and

between nominations and actuals. In determining the cash-out charges applicable under

Section 21.2.b above, Transporter will utilize actual flow quantities or, if actual flow

quantities are not available at the time of billing, the reasonable estimates, whichever

results in a lower Underage or Overage Imbalance Level, for the purpose of selecting the

appropriate imbalance index percentage.

21.4 Prior-Period Adjustments

Any imbalances for a month that are booked after the transportation for that month has been

billed as a result of receiving actual or corrected flow information will be cashed-out at

one hundred per cent (100%) of the Underage or Overage Index Price in effect during the

month the imbalance occurred, as appropriate.

21.5 Purchase and Sale of Gas

Transporter is not providing a supply service under any rate schedule of this FERC Gas

Tariff. Without limitation of the foregoing, Transporter may buy and sell gas to the extent

necessary to maintain system pressure, to implement the cash-out procedures under this

Section 21, and to perform other functions in connection with providing transportation

service. Nothing herein will be deemed to impose on Transporter any obligation to provide a

sale and purchase service to any of its Shippers.

21.6 Cash-Out Revenues

Transporter will refund or carry forward, for each calendar year, any difference between the

revenues received by Transporter and the costs incurred by Transporter as a result of

cashing-out Shipper imbalances. To the extent the difference between costs and revenues

during any calendar year is less than Four Hundred Thousand Dollars ($400,000), Transporter

shall carry forward the difference to the next calendar year. To the extent the difference

is greater than For Hundred Thousand Dollar ($400,000), Transporter shall refund or invoice

each Shipper in proportion to such Shipper's use of Transporter's system during such

calendar year within one hundred twenty (120) days after the end of the calendar year. Any

such difference, whether a positive or negative, shall include interest at the rate set

forth in Section 154.501 of the Commission's regulations.