Flex Fuel Fairness Act of 2025

Administrator— The term Administrator means the Administrator of the Environmental Protection Agency.

Flexible fuel vehicle— The term flexible fuel vehicle has the meaning given the term in section 86.1803–01 of title 40, Code of Federal Regulations (as in effect on the date of enactment of this Act).

Manufacturer— The term manufacturer has the meaning given the term in section 216 of the Clean Air Act (42 U.S.C. 7550).

In general— Not later than 120 days after the date of enactment of this Act, the Administrator shall revise section 86.1818–12 of title 40, Code of Federal Regulations, to ensure that, for purposes of determining fleet average CO2 standards under that section, manufacturers may use a gram per mile CO2 value for flexible fuel vehicles that is 31 percent lower than the gram per mile CO2 value for the same vehicle make and model that is not a flexible fuel vehicle.

Further adjustment— The Administrator may, by regulation, apply a larger percentage reduction in the gram per mile CO2 value for flexible fuel vehicles than the percentage described in subsection (a) if the Administrator determines that the larger percentage reduction is appropriate based on a version of the Greenhouse gases, Regulated Emissions, and Energy use in Technologies (GREET) model developed by Argonne National Laboratory after the date of enactment of this Act.