As the Treasury Department March 1 deadline nears to update the GREET model, a bipartisan, bicameral group of lawmakers have written to the working group in charge of the changes to asking them to ensure they are basing them on sound science, current data, and methodologies that properly recognize modern practices in agriculture and biofuel production.

U.S. Representatives Angie Craig (D-MN), Mark Pocan (D-WI), Dusty Johnson (R-SD) and Adrian Smith (R-NE), and U.S. Senators Amy Klobuchar (D-MN), John Thune (R-SD) and Tammy Duckworth (D-IL) led the effort to write the Biden Administration’s Sustainable Aviation Fuels Lifecycle Analysis Interagency Working Group, urging a timely finalization of the Department of Energy’s update of the Greenhouse Gases, Regulated Emissions and Energy Use in Technologies (GREET) modeling for the sustainable aviation fuel (SAF) market.

“As you continue to develop a model to determine eligibility, we ask that you take measures to permit every participant in the SAF lifecycle to appropriately participate in the carbon reduction process,” the lawmakers wrote. A total of 42 signed the letter.

“We thank these lawmakers for urging the administration to utilize the best available science and data when determining eligibility for the SAF tax credit established in the Inflation Reduction Act. A transparent and scientifically sound approach is crucial to stimulating investment in domestic SAF production, fostering innovation and creating American jobs,” said Renewable Fuels Association President and CEO Geoff Cooper.