The U.S. Treasury Department issued its long-awaited rules for the sustainable aviation fuel (SAF) 40B tax credit last week, but biofuel and farm groups say the requirements have created more questions than answers.  

The SAF tax credit, established by the Inflation Reduction Act (IRA) in 2022, aims to incentivize the production of SAF that achieves a lifecycle greenhouse gas (GHG) reduction of at least 50% when compared to petroleum-based jet fuels. The administration has laid out goals for producing at least 3 billion gallons...