Acts 1981, 67th Leg., p. 886, ch. 312, Sec. 4, eff. Aug. 31, 1981. Renumbered from art. 22.12a by Acts 1987, 70th Leg., ch. 167, Sec. 5.02(1), eff. Sept. 1, 1987.

Amended by Acts 1999, 76th Leg., ch. 1506, Sec. 5, eff. Sept. 1, 1999.