Ariz. Admin. Code § 14-2-2001
A. "Commission" means the Arizona Corporation Commission.
B. "Customer" means the person or entity in whose name service is rendered, as evidenced by the signature on the application or contract for service, or by the receipt or payment of bills regularly issued in their name regardless of the identity of the actual user of service.
C. "Subscriber" means the Customer identified in the account records of a Telecommunications Company; any person authorized by such Customer to change telecommunications services or to charge services to the account; or any person contractually or otherwise lawfully authorized to represent such Customer.
D. "Telecommunications Company" means a public service corporation, as defined in the Arizona Constitution, Article 15, § 2, that provides telecommunications services within the state of Arizona and over which the Commission has jurisdiction. The phrase "Telecommunications Company" does not include providers of wireless, cellular, personal communications services, or commercial mobile radio services.
E. "Unauthorized Charge" ("cramming") means any recurring charge on a Customer's telephone bill that was not authorized or verified in compliance with R14-2-2005. This does not include one-time pay-per-use charges or taxes and other surcharges that have been authorized by law to be passed through to the Customer.
Ariz. Admin. Code § R14-2-2001