The rulemaking Regulation of Fuels and Fuel Additives: Changes to Renewable Fuel Standard Program” was finalized by EPA in March 2010 (75 FR 14669, March 26, 2010). The final regulations made a number of changes to the existing Renewable Fuel Standard program while retaining many elements of the compliance and trading system already in place. The final rule also implemented the revised statutory definitions and criteria, most notably the greenhouse gas emission thresholds for renewable fuels and new limits on renewable biomass feedstocks. This entry in the regulatory agenda describes EPA's review of this action pursuant to section 610 of the Regulatory Flexibility Act (5 U.S.C. 610). As part of this review, EPA is considering comments on the following factors: (1) the continued need for the rule; (2) the nature of complaints or comments received concerning the rule; (3) the complexity of the rule; (4) the extent to which the rule overlaps, duplicates, or conflicts with other Federal, State, or local government rules; and (5) the degree to which the technology, economic conditions or other factors have changed in the area affected by the rule.