Okla. Stat. tit. 59, § 1000.30
No provision of a building code, any other law, regulation, or other requirement in Oklahoma may prohibit or otherwise limit the use of a refrigerant designated as acceptable for use pursuant to and in accordance with 42 U.S.C. 7671K; provided, any equipment containing such refrigerant is listed and installed in accordance with safety standards and use conditions imposed pursuant to such designation.
Laws 2023, SB 168, c. 23, § 1, eff. November 1, 2023.