Sec. 71.010. LEASE TERM. (a) No primary term of a lease other than a lease for coal and lignite made under this subchapter may be for a period of more than 10 years from the date of the execution and approval of the lease. (b) No primary term for a coal and lignite lease made under this subchapter may be for a period of more than 35 years from the date of execution. Acts 1977, 65th Leg., p. 2505, ch. 871, art. I, Sec. 1, eff. Sept. 1, 1977. SUBCHAPTER B. POOLING MINERAL LEASES