Tex. Natural Resources Code § 81.151: PENALTY FOR CAMPAIGNING.

A person who receives a salary from funds provided under this title and who uses his time or a state-owned automobile for campaign purposes or for the purpose of furthering the candidacy of his employer or any other candidate for state office is guilty of a misdemeanor and on conviction shall be fined not less than $100 nor more than $500 and shall be confined in jail for not less than 30 nor more than 90 days.

Acts 1977, 65th Leg., p. 2511, ch. 871, art. I, Sec. 1, eff. Sept. 1, 1977.