Section R. 460.2357 - Records; meter testsRule 57.
(1) A utility shall maintain records of the last 2 tests made on any meter. The record of the meter test made at the time of the meter's retirement shall be maintained for a minimum of 3 years.(2) Test records shall include the following information: (a) The date and reason for the test.(b) The index reading of the meter at the time of removal from the customer's premises.(c) The meter accuracy "as found."(3) If the test of the meter is made by using a test meter, transfer prover, or flow prover, the utility shall retain, as test records, all data taken at the time of the test in complete form to permit the checking of the test methods and the calculations.Mich. Admin. Code R. 460.2357