In this chapter:
(1) "Commission" means the Railroad Commission of Texas.
(2) "Board" means the School Land Board.
(3) "Commissioner" means the Commissioner of the General Land Office.
(4) "Geothermal energy and associated resources" means:
(A) products of geothermal processes, embracing indigenous steam, hot water and hot brines, and geopressured water;
(B) steam and other gasses, hot water and hot brines resulting from water, gas, or other fluids artificially introduced into geothermal formations;
(C) heat or other associated energy found in geothermal formations; and
(D) any by-product derived from them.
(5) "By-product" means any other element found in a geothermal formation which is brought to the surface, whether or not it is used in geothermal heat or pressure inducing energy generation. The term does not include:
(A) a mineral, as defined by Section 75.001, Property Code; or
(B) oil, gas, or a product of oil or gas, as defined by Section 85.001.