Texas Utilities Code - UTIL § 14.206. Entering Premises of Public Utility

(a) A member, agent, or employee of a regulatory authority may enter the premises occupied by a public utility to conduct an inspection, examination, or test or to exercise any other authority provided by this title.

(b) A member, agent, or employee of the regulatory authority may act under this section only during reasonable hours and after reasonable notice to the public utility.

(c) A public utility is entitled to be represented when an inspection, examination, or test is conducted on its premises. The utility is entitled to a reasonable time to secure a representative before the inspection, examination, or test begins.