(1) Gas utilities must establish records showing the history of each meter purchased and installed. Each record must be maintained for the life of the meter, plus three months. The forms of such records are subject to commission approval and must contain the following information, at a minimum:

(a) The date of purchase;

(b) Gas utility's identification number;

(c) Type, model, or series of meter; and

(d) Current meter location.

(2) The utility must maintain the meter history from the meter's last shop maintenance and "out proof test" through service, removal and "in proof test," plus six months. The records are subject to approval of the commission and must contain, at a minimum, the following information:

(a) Date and nature of repairs;

(b) Date and results of the "out proof test";

(c) Date and results of the "in proof test";

(d) Date, location, and index reading when placed in service;

(e) Date, location, and index reading when removed from service; and

(f) Date, complainant's name and address, and results of any complaint test(s) made while the meter was in service.

(3) Overhauled meters that meet new meter standards may be retired and reenter the system as new meters.