ORS § 646.915
The State Department of Agriculture may adopt rules that require a retail dealer or nonretail dealer to display on fuel dispensing devices through which the retail dealer or nonretail dealer sells gasoline the names of the oxygenates and the relative concentrations of the oxygenates present in the gasoline if the retail dealer or nonretail dealer knowingly sells or offers for sale gasoline that is blended with any combination of aliphatic ethers, aliphatic alcohols or other oxygenates that the United States Environmental Protection Agency permits under the agency's interpretation of the term "substantially similar" in 42 U.S.C. 7545(f)(1)(A) (section 211(f)(1)(A) of the Clean Air Act), or any waivers that the federal agency grants under 42 U.S.C 7545(f)(4).
ORS 646.915