Okla. Stat. tit. 45, § 529

(A) Any person or persons, partnership, association, corporation, owner, operator and/or lessee of any mine in this state must comply with the workers' compensation laws of the State of Oklahoma. (B) Any violation of this section shall constitute a misdemeanor and shall be punishable by a fine of not exceeding One Thousand Dollars ($1,000.00). Provided the provisions of this act shall not apply to production of limestone and sand or gravel from open pits. Laws 1965, c. 262, § 11, emerg. eff. June 23, 1965.