Registration. Prior to providing pay phone service, a person shall complete and file a pay phone service provider registration form provided by the Commission. Annual Registration Report. A pay phone service provider shall file an annual registration report with the Commission by April 1 of each year. The annual registration report shall be on a form provided by the Commission and include the: Name of the pay phone service provider; Location address of each active pay phone owned or operated by the pay phone service provider; Telephone number of each active pay phone owned or operated by the pay phone service provider; and Local exchange carrier for each active pay phone owned or operated by the pay phone service provider. Proprietary Information. A pay phone service provider may request that documents filed under §§A and B of this regulation be designated as proprietary. Annual Assessment. A pay phone service provider shall pay the annual assessment required by Public Utilities Article, §2-110, Annotated Code of Maryland.