# COMAR Title 20 — Public Service Commission

## Subtitle 45 — Service Supplied by Telephone Companies

### Chapter 03 — Metering

#### Regulation .03 Billing Recording Equipment.

*COMAR 20.45.03.03*

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.