Okla. Stat. tit. 17, § 17-342: Authority to promulgate rules and specifications

A. Jurisdiction is conferred upon the Corporation Commission,

and the same is authorized and empowered, to prescribe and

promulgate rules and specifications for safety and quality with

reference to regulated substances as it may deem proper from time to

time. The Corporation Commission shall prescribe rules governing

the test for octane rating on motor fuels and prescribe the rating.

B. All specifications as may be prescribed and promulgated by

the Corporation Commission shall be accepted as statutory enactments

and shall be received as prima facie evidence by any court of

competent jurisdiction within the State of Oklahoma.