Texas Utilities Code - UTIL § 186.021. Emergency Involving Hostage or Armed Suspect

(a) In an emergency in which the supervising law enforcement official having jurisdiction in the geographical area has probable cause to believe that an armed and barricaded suspect or a person holding a hostage is committing a crime, the supervising law enforcement official may order a designated telephone company security official to cut or otherwise control telephone lines to prevent telephone communication by the armed suspect or the hostage holder with a person other than a peace officer or person authorized by a peace officer.

(b) The serving telephone company in the geographical area of a law enforcement unit shall designate a telephone company security official and an alternate to provide all required assistance to law enforcement officials to carry out this section.

(c) Good faith reliance on an order given by a supervising law enforcement official under this section is a complete defense to a civil or criminal action brought against a telephone company or the company's director, officer, agent, or employee as a result of compliance with the order.