Texas Civil Practice and Remedies Code - CIV PRAC & REM § 101.053. Judicial

(a) This chapter does not apply to a claim based on an act or omission of a court of this state or any member of a court of this state acting in his official capacity or to a judicial function of a governmental unit. “Official capacity” means all duties of office and includes administrative decisions or actions.

(b) This chapter does not apply to a claim based on an act or omission of an employee in the execution of a lawful order of any court.