Under the Clean Air Act (CAA), the U.S. Environmental Protection Agency (EPA) is required to determine the applicable volume requirements for the Renewable Fuel Standard (RFS) for years after those specified in the statute. The EPA is establishing the applicable volumes and percentage standards for 2026 and 2027 for cellulosic biofuel, biomass-based diesel (BBD), advanced biofuel, and total renewable fuel. The EPA is also partially waiving the 2025 cellulosic biofuel volume requirement and revising the associated percentage standard due to a shortfall in cellulosic biofuel production. Finally, the EPA is promulgating several regulatory changes to the RFS program, including removing renewable electricity as a qualifying renewable fuel under the RFS program (eRINs) and making minor revisions to the biogas provisions of the RFS program. This rule is effective on 15 June 2026, except for amendatory instruction 47, which is effective on 28 April 2026, and amendatory instruction 17, which is effective on 1 January 2027. POC is Dallas Burkholder, tele: 734-214-4766; email: RFS-Rulemakings@epa.gov. (Federal Register 1 April 2026 [Final Rule] Pages 16388-16500).