LEASE TERM.
Tex. NAT. RES Code § 71.010.
in effect(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.
SUBCHAPTER B. POOLING MINERAL LEASES
