The US Treasury's final hydrogen 45V guidance sets the stage for qualifying electrolytic hydrogen projects by establishing rules that emphasize clean power delivery at the time of production. Project developers must understand and comply with the guidance to optimize projects and secure financing. Contracts with clean power facilities are crucial, starting with direct agreements and potentially evolving into more complex Energy Attribute Credits (EAC) strategies. The guidance allows for increasing sophistication as markets mature, promoting a market-driven system where regions with strong clean energy deployment offer competitive opportunities for hydrogen production. The rule covers incrementality, temporality, and deliverability aspects. Incrementality provisions include allowing at-risk nuclear plants and state exemptions, while temporality extends annual matching to 2030 with flexibility for hourly matching thereafter. Deliverability requirements establish clear boundaries and safe harbor provisions for qualifying clean power facilities. Overall, the final rule aims to provide flexibility, incentives, and guidance for the successful implementation of green hydrogen projects in the United States.