When mechanical or electronic means, or both, are used for recording information that will affect a customer's bill for local or toll service, or both, the equipment shall be inspected after installation and periodically tested in order to insure its proper functioning and accuracy. The utility shall keep records of malfunctions. The retention period for these records shall be 1 year.

Authority: Public Utilities Article, §§2-121 and 5-101, Annotated Code of Maryland

Effective date: January 1, 1976 (Order No. 61496)