(1) The gas utility must include a statement in its tariff describing its practice under these rules covering:

(a) The description of test methods used and frequency of tests for determining the meter accuracy. The description must include, but is not limited to:

(i) Test group detail and selection procedures;

(ii) Performance standard details for meters that exceed the maximum allowable tolerance for slow as well as fast meters;

(iii) The corrective action and time period that will be implemented; and

(iv) Reference to an industry standard such as ANSI C12.1 or ANSI/[isrt]ASQC-Z1.9 that will establish acceptable criteria for numerical analysis.

(b) The description of meter testing equipment and accuracy determination methods.

(c) The name of the testing laboratory making meter tests if gas companies do not maintain meter testing equipment.

(d) The testing and adjustment program of meters prior to installation and periodic tests after installation.

(2) If a gas utility changes any portion of the meter test procedure, a revised tariff must be submitted.