Okla. Stat. tit. 17, § 348.7

Advertising of antifreeze - Restricted statements. No advertising literature relating to any antifreeze sold or to be sold in this state shall contain any statement that the antifreeze advertised for sale has been approved by the Oklahoma Corporation Commission unless the antifreeze has been permitted by the Corporation Commission and found to meet the standards of the Corporation Commission and not to be in violation of Sections 348 through 348.9 of this title, in which event such statement together with the permit number of the wholesaler or distributor may be contained in any labeling and advertising literature where such brand or trademark or antifreeze is being advertised for sale.