On June 4, 2018, several biofuel and agricultural groups, including the Renewable Fuels Association, the Biotechnology Innovation Organization, the American Coalition for Ethanol (ACE), and the National Biodiesel Board, among others, petitioned the U.S. Environmental Protection Agency (EPA) regarding EPA’s Renewable Fuel Standard (RFS) obligations. The ACE announcement states that the petition asks EPA to “change its regulations to account for lost volumes of renewable fuel resulting from the unprecedented number of retroactive small refinery exemptions from [RFS] obligations recently granted by EPA.” The petition states that Section 211(o)(2)(a)(i) of the Clean Air Act “requires EPA to ensure that the annual required volumes of renewable fuel are introduced into the nation’s transportation fuel supply,” and that EPA’s “suddenly reversing its prior policy and granting retroactive exemptions to so many small refineries without adjusting its Annual Standard Equations to account for the resulting lost volumes,” means that EPA is “failing to meet its statutory obligation to ‘ensure’ that transportation fuels in the United States contain the applicable volumes of renewable fuel.” The petition requests EPA to (1) convene a proceeding to reconsider the annual standard equations in 40 C.F.R. § 80.1405(c); and (2) convene a proceeding to reconsider its final action entitled “Periodic Reviews for the Renewable Fuel Standard Program” (82 Fed. Reg. 58364 (Dec. 12, 2017)).