Regulation of Fuels and Fuel Additives: Removal of Reformulated Gasoline Oxygen Content Requirement for California Gasoline and Revision of Commingling Prohibition To Address Non-Oxygenated Reformulated Gasoline in California

In the Energy Policy Act of 2005 (Energy Act), Congress removed the oxygen content requirement for reformulated gasoline (RFG) in Section 211(k) of the Clean Air Act (CAA). The Energy Act specified that this change was to be immediately effective in California, and that it would be effective 270 days after enactment for the rest of the country. This direct final rule amends the fuels regulations to remove the oxygen content requirement for RFG for gasoline produced and sold for use in California, thereby making the fuels regulations consistent with amended Section 211(k). In addition, for gasoline produced and sold for use in California, this rule extends the current prohibition against combining VOC-controlled RFG blended with ethanol with VOC-controlled RFG blended with any other type of oxygenate from January 1 through September 15, to also prohibit combining VOC-controlled RFG blended with ethanol with non-oxygenated VOC-controlled RFG during that time period, except in limited circumstances authorized by the Act. The removal of the RFG oxygen content requirement and revision of the commingling prohibition for gasoline produced and sold for use in all areas of the country is being published in a separate direct final rule that will have a later effective date than this California specific rulemaking.