(a) Each utility shall keep numerically arranged and classified records providing the following information for each meter owned and used by the utility for any purpose:
(1) Identification number;
(2) Date of purchase;
(3) Name of manufacturer, serial number, type and rating; and
(4) Information on each customer on whose premises the meter has been in service, including:
a. Name and address; and
b. Date of installation and removal.
(b) The records required by (a) above shall be maintained in a manner such that the date of the last test is readily ascertainable.