Panther Interstate Pipeline Energy, L.L.C.

Original Volume No. 1

Effective Date: 02/01/2004, Docket: CP03-338-001, Status: Effective

Original Sheet No. 21 Original Sheet No. 21 : Effective

types of flow computers is required, unless otherwise

mutually agreed, and such equipment shall be installed, and

quantities calculated, in accord with generally accepted

industry practices.

(d) New Measurement Techniques: If, at any time, a new method

or technique is developed with respect to gas measurement or

the determination of the factors used in such gas

measurement, such new method or technique may be substituted

upon mutual agreement thereto by the parties.

4.2 Right to be Present: Transporter and Shipper shall each have the

right to have representatives present at the time of any

installing, reading, cleaning, changing, repairing, inspecting,

testing, calibrating or adjusting done in connection with the

other's measuring equipment used in measuring or checking the

measurement of deliveries of gas under the transportation

contract. The records from such measuring equipment shall remain

the property of their owner, but, upon request, each will submit

to the other its records and charts, together with calculations

therefrom, for inspection and verification, subject to return

within ten Days after receipt thereof.

4.3 Care Required: Any installation of measuring equipment applying

to or affecting deliveries of gas shall be made in such manner as

to permit an accurate determination of the quantity of gas

delivered and ready verification of the accuracy of measurement.

Care shall be exercised by both parties in the installation,

maintenance and operation of pressure-regulating equipment so as

to prevent any inaccuracy in the determination of the quantity of

gas delivered under transportation service agreements.

4.4 Calibration and Testing of Meters:

(a) The accuracy of Transporter's or Shipper's measuring

equipment shall be verified at reasonable intervals and, if

requested, in the presence of representatives of the other

party, but neither party shall be required to verify the

accuracy of such equipment more frequently than once in any

thirty-day period. In the event either party shall notify

the other that it desires a special test of any measuring

equipment, the parties shall cooperate to secure a prompt

verification of the accuracy of such equipment. The expense

of any such special test, if called for, shall be borne by