A cable operator shall respond in writing within 30 days to any written request by any person for the identification of the signals carried on its system in fulfillment of the must-carry requirements of § 76.56 . The required written response may be delivered by email, if the consumer used email to make the request or complaint directly to the cable operator, or if the consumer specifies email as the preferred delivery method in the request or complaint.
47 C.F.R. §76.1614