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This rule continues to implement the phasedown provisions under the American Innovation and Manufacturing (AIM) Act of 2020. The AIM Act identifies six applications that are to receive “the full quantity of [HFC] allowances necessary, based on projected, current, and historical trends,” under the allowance allocation program through the end of 2025. The six applications are a propellant in metered dose inhalers, defense sprays, structural composite preformed polyurethane foam for marine use and trailer use, the etching of semiconductor material or wafers and the cleaning of chemical vapor deposition chambers within the semiconductor manufacturing sector, mission-critical military end uses, and onboard aerospace fire suppression. The statute requires that EPA review these applications "not less frequently than once every five years" and renew eligibility for allowances for up to five years at a time based on statutory criteria outlined in the AIM Act. In this final rule, EPA intends to establish renewal decisions for each of the six applications, consistent with the statutory process under AIM subsection (e)(4)(B). Additionally, EPA proposed to establish procedures and the timeline for submitting a petition to designate an application as eligible for ASAs, make targeted revisions to the methodology used to allocate allowances to ASA holders for calendar years 2026 and beyond, and make limited revisions to existing requirements.