Tex. Elec. Code § 113.002
A former resident of this state is eligible to vote a presidential ballot in the presidential general election by personal appearance or by mail if the former resident:
Acts 1985, 69th Leg., ch. 211, Sec. 1, eff. Jan. 1, 1986.
Amended by Acts 1991, 72nd Leg., ch. 203, Sec. 2.29;
Acts 1991, 72nd Leg., ch. 554, Sec. 1, eff. Sept. 1, 1991.