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

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). To be consistent with the current CAA section 211(k), this direct final rule amends the fuels regulations to remove the oxygen content requirement for RFG. This rule also removes requirements which were included in the regulations to implement and ensure compliance with the oxygen content requirement. In addition, 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.