Tex. Educ. Code § 109.158
(b) If before the expiration of five years oil, gas, sulphur, or other minerals have not been produced in paying quantities, the lease shall terminate unless extended as provided in Sections 109.160 and 109.161.
Acts 2015, 84th Leg., R.S., Ch. 1173 (S.B. 907), Sec. 9, eff. June 19, 2015.