The Department of the Treasury published Final Regulations on January 10, 2024, outlining guidelines for the section 45V Clean Hydrogen Production Tax Credit. This credit is based on the lifecycle greenhouse gas emissions rate of qualified clean hydrogen, which determines the credit amount on a sliding scale. The regulations specify the use of the 45VH2-GREET model to calculate emissions rates, with provisions for Provisional Emissions Rates where necessary. Key takeaways include the ability to lock-in the 45VH2-GREET model upon construction start, changes to electricity EAC requirements, and restrictions on feedstock blending. The regulations also define 'facility' to include co-located carbon capture and hydrogen production equipment. Taxpayers are given clarity on 'productive use' and anti-abuse provisions. The Final Regulations ensure transparency and offer a structured approach for taxpayers to calculate and substantiate emissions rates to claim the tax credit.