§ 57.25 METER TESTING AND ADJUSTMENT.
   (A)   At the written request of the owner or consumer, the Water Department will test the meter supplying the premises. A deposit to be set by Council ordinance will be required before the meter is disconnected, which sum will not be refunded if the meter is found to be registering within 4%; otherwise the deposit will be returned to the party making the same. The owner or consumer can, if desired, be present at the time the test is made. The result of the test will be reported to the owner or consumer in every case.
   (B)   If the testing of the meter shows that it fails to register correctly within 4%, the charge to the consumer will be adjusted accordingly as the registration varies from 100% and such adjustment shall apply to the current period only, unless it is apparent to the Council that a previous period’s consumption has also been affected by the same incorrect registration. When it is impracticable to make adjustment as indicated above, the charge shall be equitably adjusted by the Council. All adjustments for charges for water shall be made by ordinance of the Council.
(`89 Code, § 161.110)