(A) If a meter has been tested at the request of a consumer and shall have been determined to register “fast,” the Department shall credit the consumer with a sum equal to the percent “fast” multiplied by the amount of all bills incurred by the consumer within the six months prior to the test, and if a meter so tested is determined to register “slow,” the Department may collect from the consumer a sum equal to the percent “slow” multiplied by the amount of all the bills incurred by the consumer for the prior six months.
(B) When the Department on its own initiative makes a test of a water meter, it shall be done without cost to the consumer, other than the consumer paying the amount due to the city for water used by him or her as above provided, if the meter is found to be “slow.”