On 3 January 2025, the Department of the Treasury and the Internal Revenue Service announced the issuance of final regulations implementing the Section 45V Clean Hydrogen Production Tax Credit. These regulations are a significant step towards promoting clean hydrogen production in the United States. The Final Rules made various adjustments to the Proposed Rules, focusing on providing flexibility to industry players while maintaining the credit's integrity. The regulations aim to ensure that clean hydrogen production meets the lifecycle emissions standards set by the Inflation Reduction Act of 2022. One of the key aspects addressed in the Final Rules is the Energy Attribute Certificate (EAC) framework, which documents and verifies electricity generation for hydrogen production. The regulations introduce requirements for incrementality, deliverability, and temporal matching to ensure the authenticity of clean hydrogen production processes. Notable changes include allowing tax credit pathways for hydrogen produced from both electricity and certain methane sources. Additionally, the Final Rules expand eligibility pathways, such as modifications to the uprate rules, inclusion of restarted electric generation facilities, qualifying nuclear reactors, and CCS technologies. These changes aim to provide more options for industry players seeking to benefit from the Section 45V tax credit. While the Final Rules are a positive step towards incentivizing clean hydrogen production, there remains uncertainty due to the transition in the US government. The Biden Administration's efforts to promote clean hydrogen production through initiatives like the US$1.66 billion loan guarantee for Plug Power may face challenges with the new administration and Congress. Despite this, the regulations offer a framework for investment certainty and environmental impact assessment in the evolving energy sector.