Tex. Elec. Code § 276.001
(a) A person commits an offense if, in retaliation against a voter who has voted for or against a candidate or measure or a voter who has refused to reveal how the voter voted, the person knowingly:
Acts 1985, 69th Leg., ch. 211, Sec. 1, eff. Jan. 1, 1986.
Amended by Acts 1997, 75th Leg., ch. 864, Sec. 256, eff. Sept. 1, 1997.