On July 5, 2017, the U.S. Environmental Protection Agency (EPA) issued proposed volume requirements under the Renewable Fuel Standard (RFS) program for cellulosic biofuel, advanced biofuel, and total renewable fuel for 2018, as well as biomass-based diesel for 2019. The proposal lowers the blending requirement for all renewable fuel with the exception of biomass-based diesel, which maintains the 2017 blending requirement. The proposed volume requirements are:

Cellulosic biofuel, from 311 million gallons in 2017 to 238 million gallons in 2018;

Advanced biofuel, from 4.28 billion gallons in 2017 to 4.24 billion gallons in 2018;

Renewable fuel, from 19.28 billion gallons in 2017 to 19.24 billion gallons in 2018; and

Biomass-based diesel, 2.1 billion gallons in 2018 and 2019.

These volumes would set the percentage standards at 0.131 percent for cellulosic biofuel, 2.34 percent for advanced biofuel, 10.62 percent for renewable fuel, and 1.74 percent for biomass-based diesel. The proposed rule will be open for comment for 45 days following the official publication in the Federal Register.