The IRS has issued proposed regulations for determining eligibility and calculating the clean fuel production credit under the One Big Beautiful Bill. The regulations provide guidance on emissions rates, certification requirements, and implementation of key changes to the 45Z credit for clean transportation fuel produced domestically after Dec. 31, 2024, and sold by Dec. 31, 2029. Public comments on the proposed regulations are being accepted through the Federal e-Rulemaking portal, with a public hearing scheduled as described in the “Comments and Public Hearing” section. [IR-2026-20 (Feb. 3, 2026)]
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