Sec. 71.009.  ROYALTY.  (a)  In each lease other than a lease for coal and lignite executed under this subchapter, the lessor shall retain at least a one-eighth royalty.
(b)  In a lease for coal and lignite executed under this subchapter, the lessor shall retain at least a royalty based on one of the following or a combination of the following:
(1)  a sum certain per ton;
(2)  a percentage certain of the gross sale price F.O.B. at the mine site of the coal and lignite;  or
(3)  a sum certain for each acre-foot of coal and lignite mined and removed from the premises.
(c)  Royalties under a coal and lignite lease may be paid as advanced mineral royalties.
Acts 1977, 65th Leg., p. 2505, ch. 871, art. I, Sec. 1, eff. Sept. 1, 1977.