Okla. Stat. tit. 17, § 316
No county, incorporated or nonincorporated municipality, state agency or political subdivision shall enact ordinances or promulgate any rules, ordinances or regulations governing any aspect of storage tanks within the State of Oklahoma that shall be in conflict with any of the provisions of the Oklahoma Storage Tank Regulation Act, or any rules promulgated by the Corporation Commission pursuant to the provisions of the Oklahoma Storage Tank Regulation Act.
Laws 1989, c. 90, § 16, emerg. eff. April 21, 1989; Laws 1993, c. 344, § 13, emerg. eff. June 9, 1993; Amended by Laws 1998, c. 375, § 23, eff. June 9,1998 (superseded document available).