Tex. Lab. Code § 504.014
A person is not an employee and is not entitled to compensation under this chapter if the person:
(4) performs services that may benefit a political subdivision, or is employed by or under contract with a performer providing those services, but does not receive payment from the political subdivision for the performance of the services, if the services are performed in connection with the operation or production of:
Acts 1993, 73rd Leg., ch. 269, Sec. 1, eff. Sept. 1, 1993.
Amended by Acts 2003, 78th Leg., ch. 841, Sec. 1, eff. Sept. 1, 2003.