Tex. Nat. Res. Code § 152.063
Acts 1977, 65th Leg., p. 2651, ch. 871, art. I, Sec. 1, eff. Sept. 1, 1977.
Acts 2017, 85th Leg., R.S., Ch. 859 (H.B. 2567), Sec. 14, eff. September 1, 2017.