Tex. Nat. Res. Code § 53.111
The commissioner on behalf of the state or any fund that belongs to the state may execute agreements that provide for operating areas as a unit for the exploration, development, and production of sulphur and may commit to the agreements:
Acts 1977, 65th Leg., p. 2473, ch. 871, art. I, Sec. 1, eff. Sept. 1, 1977.
Amended by Acts 1993, 73rd Leg., ch. 897, Sec. 55, eff. Sept. 1, 1993.