(a) If cable service to a subscriber is interrupted for more than twenty-four continuous hours, such subscriber shall, upon request, receive a credit or refund from the cable operator in an amount that represents the proportionate share of such service not received in a billing period, provided such interruption is not caused by the subscriber.
(b) The commission may promulgate rules establishing a viewing time reliability standard for cable operators and requiring such companies to file with the commission information on service interruptions not caused by subscribers.