Tex. Utilities Code § 55.104: USE OF INFORMATION.

(a) A person may not use a caller identification service to compile and sell specific local call information without the affirmative approval of the originating telephone customer.

(b) This section does not prohibit a provider of caller identification service from:

(1) verifying network performance or testing the caller identification service;

(2) compiling, using, and disclosing aggregate caller identification information; or

(3) complying with applicable law or legal process.

Acts 1997, 75th Leg., ch. 166, Sec. 1, eff. Sept. 1, 1997.