Section 41.1. Lavatory facilities at terminals

(a) A carrier of persons by rail, motor vehicle or aircraft shall provide a minimum of 1/2 of their rest room commodes free of charge to patrons, prospec-tive customers and persons picking up and leaving off patrons and prospective customers. The carrier may restrict the use of rest room facilities to passengers and other persons properly waiting at the terminal, but these carriers shall have on duty and available during hours during which the terminal is open an employe who can allow persons to gain entrance to the facilities. In the event a system of restricted usage is employed, signs shall be posted to acquaint persons with this procedure.

(b) In situations where rest room entry doors are locked, admission keys shall be readily provided without charge when requested, and notice as to the availability of the key shall be posted on the rest room entry door.