The US Treasury's final hydrogen 45V guidance establishes rules for qualifying electrolytic hydrogen projects, focusing on delivering clean power at the time of production to qualify for tax credits. Project developers must understand foundational requirements, contract structures, and prepare for hourly matching by 2030 to meet delivery requirements. Starting with direct agreements with clean power facilities can provide a simple path to project development, while the guidance allows for more sophisticated approaches as markets mature. The rule covers important details on incrementality, such as provisions for at-risk nuclear plants and state exemptions. Temporal provisions extend annual matching to 2030, providing flexibility in calculating credits for each electrolyzer separately. Deliverability rules set clear boundaries and requirements for cross-regional clean electricity, ensuring a predictable system for determining if a facility is 'deliverable.' The guidance promotes a positive sentiment by creating a market-driven system and offering flexibility for project optimization and growth in the hydrogen sector.