4 CCR 723-4 Rule 4303
Meter Testing Equipment and Facilities
(a)A utility shall provide, or shall arrange for a qualified third party to provide, such equipment and facilities as may be necessary to make the tests and to provide the service required. Such equipment and facilities shall be available at all reasonable times for inspection by Commission staff.#
(b)A utility having more than 200 meters in service shall maintain, or shall require the qualified third party that provides meter testing equipment and facilities to maintain, suitable gas meter testing equipment in proper adjustment so as to register the condition of meters tested within one-half of one percent. The utility shall have and shall maintain, for the testing equipment, necessary certificate(s) of calibration showing that the equipment has been tested with a standard certified by the National Institute of Standards and Technology or other laboratory of recognized standing.#
(c)In its tariff, a utility shall include a description of its meter testing equipment and of the methods employed to ascertain and to maintain accuracy of all testing equipment.#
(d)A utility shall keep records of certification and calibrations for all testing equipment required by this rule for the life of the equipment.#