Tex. Occ. Code § 901.307
(a) The board by rule shall:
Acts 1999, 76th Leg., ch. 388, Sec. 1, eff. Sept. 1, 1999.
Amended by Acts 2001, 77th Leg., ch. 381, Sec. 5, eff. Sept. 1, 2001;
Acts 2001, 77th Leg., ch. 1497, Sec. 22, eff. Sept. 1, 2001;
Acts 2003, 78th Leg., ch. 1276, Sec. 14.006(c), eff. Sept. 1, 2003.