Tex. Penal Code § 7.03
In a prosecution in which an actor's criminal responsibility is based on the conduct of another, the actor may be convicted on proof of commission of the offense and that he was a party to its commission, and it is no defense:
Acts 1973, 63rd Leg., p. 883, ch. 399, Sec. 1, eff. Jan. 1, 1974.
Amended by Acts 1993, 73rd Leg., ch. 900, Sec. 1.01, eff. Sept. 1, 1994.