Okla. Stat. tit. 45, § 45-745: Exemptions

Surface coal mining operations in operation pursuant to a permit

issued by this state before August 3, 1977, issued to a person in

existence prior to May 2, 1977, and operated by a person whose total

annual production of coal from surface and underground coal mining

operations does not exceed one hundred thousand (100,000) tons shall

not be subject to the provisions of this section except with

reference to the provisions relating to steep slope mining in

Section 15 of this act until January 1, 1979.