The American Innovation and Manufacturing (AIM) Act provides the U.S. EPA authority to phase down the production and consumption of HFCs through an allowance allocation and trading program. The AIM Act identifies the six applications that are to receive “the full quantity of allowances necessary, based on projected, current, and historical trends” through the end of 2025. The six applications are: (1) a propellant in metered dose inhalers; (2) defense sprays; (3) structural composite preformed polyurethane foam for marine use and trailer use; (4) the etching of semiconductor material or wafers and the cleaning of chemical vapor deposition chambers within the semiconductor manufacturing sector; (5) mission-critical military end uses; and (6) onboard aerospace fire suppression. EPA can renew this status for up to five years at a time based on statutory criteria outlined in the AIM Act. Through this rulemaking, EPA intends to review and consider whether to renew eligibility for each of these six applications, consistent with this statutory process. Additionally, EPA intends to establish how it will review eligibility if petitioned for inclusion of additional applications and to consider revisions to existing regulatory requirements, such as the methodology for determining the allocation quantity for application-specific allowances and reporting requirements.