(a) The commission by rule shall require an operator service provider to include in its contract with each entity through which it provides operator service a provision that requires each telephone subscribed to its service to allow access to:
(1) the local exchange carrier operator serving the exchange from which the call is made; and
(2) other telecommunications utilities.
(b) To prevent fraudulent use of its service, an operator service provider or an entity through which it provides operator service may block the access described by Subsection (a) by obtaining a waiver for this purpose from the commission or the Federal Communications Commission. The commission by rule shall establish the procedure and criteria for obtaining a waiver from the commission.