Section 55.102 - Applicability(a) This subchapter applies only to the provision of caller identification service.(b) This subchapter does not apply to:(1) an identification service that is used in a limited system, including a central office based PBX-type system;(2) information that is used on a public agency's emergency telephone line or on a line that receives the primary emergency telephone number (911);(3) information exchanged between telecommunications utilities, enhanced service providers, or other entities that is necessary for the setting up, processing, transmission, or billing of telecommunications or related services;(4) information provided in compliance with applicable law or legal process; or(5) an identification service provided in connection with a 700, 800, or 900 access code telecommunications service. Acts 1997, 75th Leg., ch. 166, Sec. 1, eff. Sept. 1, 1997.