The Department of the Treasury has finalized regulations governing the Clean Hydrogen Production Tax Credit under section 45V, aimed at promoting qualified clean hydrogen production. The regulations offer guidance on calculating the emissions rate using the 45VH2-GREET model or Provisional Emissions Rate. Notably, the Final Regulations clarify the use of Energy Attribute Certificates for substantiating emissions rates. Key takeaways include the lock-in option for the 45VH2-GREET model, adjustments in electricity EAC requirements, and prohibitions on feedstock blending. Furthermore, the regulations define 'facility' for co-location benefits under sections 45V and 45Q, allowing interconnected property components for hydrogen production and carbon capture equipment. The well-to-gate scope for emissions calculation is detailed, excluding emissions from certain hydrogen processing stages. The ban on feedstock blending and the necessity to evaluate emissions for each production process are emphasized. Overall, the regulations aim to incentivize accurate emissions rate determination and adherence to anti-abuse provisions for claiming tax credits in the clean hydrogen sector.