EXCLUSIONS AND EXEMPTIONS.
Tex. NAT. RES Code § 131.006.
in effectThe provisions of this chapter do not apply to the following:
(1) surface mining operations conducted on public land regulated by the General Land Office if the land is reclaimed in a manner consistent with this chapter; and
(2) land on which the overburden has been removed and minerals have been produced before June 21, 1975.
SUBCHAPTER B. POWERS AND DUTIES OF THE COMMISSION