(1) Electric utilities must keep records showing the history of each meter purchased and installed. Such records 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 approximate date of purchase;

(b) The manufacturer's name and meter number or the utility's own unique meter identification number;

(c) The place(s) of installation; and

(d) The readings at the time of each installation and each removal.

(2) The records must include the date of all tests made on the meter, together with data recorded and computations made to determine the meter's accuracy. If a test is a complaint test, the records must include the complainant's name and the meter's calculated accuracy before and after the test.