Okla. Stat. tit. 47, § 47-12-410: Air-conditioning equipment

A. The term "air-conditioning equipment" as used or referred to

in this section shall mean mechanical vapor compression

refrigeration equipment which is used to cool the driver's or

passenger compartment of any motor vehicle.

B. Such equipment shall be manufactured, installed and

maintained with due regard for the safety of the occupants of the

vehicle and the public and shall not contain any refrigerant which

is toxic to persons or which is flammable or which is in violation

of regulations of the Environmental Protection Agency pursuant to 40

C.F.R., Part 82 or which is not included in the list published by

the Environmental Protection Agency as a safe alternative motor

vehicle air conditioning substitute for chlorofluorocarbon-12,

pursuant to 42 U.S.C. 7671 k(c).

C. Safety requirements and specifications consistent with the

requirements of this section applicable to such equipment shall

correlate with and, so far as possible, conform to the current

recommended practice or standard applicable to such equipment

approved by the Society of Automotive Engineers (SAE).