Wis. Admin. Code § PSC 185.46
(1) Meter test records.
(a) A utility shall create a record of a meter test whenever a meter is tested. If the meter is tested again, the utility need not retain the previous test record once the information in that record has been entered in the meter history record. The meter test record shall include all of the following:
(2) Meter history records.
(a) Each utility shall keep a history record for each meter sufficient to fulfill the requirements of s. PSC 185.19, including all of the following:
History: Cr. Register, January, 1997, No. 493, eff. 2-1-97; CR 13-033: r. and recr. (1), (2) Register July 2015 No. 715, eff. 8-1-15.