Date,Action,Citation,What it covers,Status on 2026-11-02
2020-12-27,AIM Act enacted,"Pub. L. 116-260, Div. S, Sec. 103",Directs EPA to cut HFC production and consumption to 15% of baseline by 2036,in force
2021-10-05,Allowance allocation framework rule,"86 FR 55116, FR Doc 2021-21030","Sets baselines, the step-down schedule and the allowance system in 40 CFR 84 subpart A; effective 2021-11-04","in force, amended"
2021-10-07,Notice of 2022 allowances,"86 FR 55841, FR Doc 2021-21951","First allowances: consumption pool of 273,498,315 MTEVe for 2022",completed
2022-01-01,First step: cap at 90% of baseline,40 CFR 84.7,"Applies to bulk HFC production and import, not to equipment",completed
2023-07-12,Production baseline adjustment,"88 FR 44220, FR Doc 2023-14189","Revises the production baseline to 382,535,439 MTEVe",in force
2023-10-24,Technology Transitions final rule,"88 FR 73098, FR Doc 2023-22529",Sector GWP limits; residential and light commercial AC and heat pumps capped at GWP 700 from 2025-01-01,"in force, amended"
2023-12-26,Interim final rule on residential AC inventory,"88 FR 88825, FR Doc 2023-28500",Pre-2025 split-system components may be installed until 2026-01-01,superseded by 91 FR 31284
2024-01-01,Second step: cap at 60% of baseline,40 CFR 84.7,"Consumption cap falls to 181,522,990 MTEVe for 2024 to 2028",in force
2024-10-11,Emissions reduction and reclamation rule,"89 FR 82682, FR Doc 2024-21967","Leak repair for 15 lb+ appliances from 2026 (residential AC excluded), reclaim standard, cylinder heel rule",in force
2024-12-12,VRF installation rule,"89 FR 100381, FR Doc 2024-29243",Pre-2026 VRF components installable to 2027-01-01; to 2028-01-01 with a permit issued before 2023-10-05,in force
2025-01-01,Residential AC and heat pump manufacture and install limits begin,"40 CFR 84.54(a)(1), (c)(1)",No new manufacture or import of GWP 700+ self-contained units; no new GWP 700+ split installs from post-2024 parts,in force
2025-10-03,Technology Transitions reconsideration proposal,"90 FR 47999, FR Doc 2025-19438",Proposes removing the inventory install deadline; asks for comment on R-454B supply,finalized 2026-05-26
2025-11-14,Comment period extended,"90 FR 51042, FR Doc 2025-19895",Comments accepted to 2025-11-21,completed
2025-11-20,Notice of 2026 allowances,"90 FR 52391, FR Doc 2025-20439","Consumption pool held at 181,522,990 MTEVe",completed
2026-01-01,Inventory install deadline in eCFR text; VRF install limit begins,"40 CFR 84.54(c)(1), (c)(2)",Pre-2025 split-system inventory could no longer be installed under the text then in force,amended 2026-07-27
2026-05-26,Technology Transitions reconsideration final rule,"91 FR 31284, FR Doc 2026-10387","Removes the inventory install deadline; changes intermodal, cold storage, supermarket and lab dates or limits",in force since 2026-07-27
2026-05-26,Proposal to exempt transport refrigeration units from leak repair,"91 FR 30532, FR Doc 2026-10388",Road and intermodal TRUs; comments closed 2026-07-10,proposed
2026-07-28,Notice of data availability on 2022 to 2025 allocation data,"91 FR 47236, FR Doc 2026-15219",EPA says it will propose rules on issuing allowances from 2029,"open, rule to follow"
2026-10-06,Notice of 2027 allowances,"91 FR 63548, FR Doc 2026-20389","Consumption pool held at 181,522,990 MTEVe",completed
2027-01-01,VRF inventory install deadline; data center and supermarket limits,"40 CFR 84.54(c)(2), (c)(12), (c)(13)",Last day to install pre-2026 VRF components without a qualifying permit is 2026-12-31,scheduled
2028-01-01,Sell-through ends for pre-2025 self-contained AC; cylinder heel rule,40 CFR 84.54(b); 84.116,No sale or distribution of GWP 700+ self-contained AC and heat pumps; used disposable cylinders sent for heel removal,scheduled
2029-01-01,Third step: cap at 30% of baseline,40 CFR 84.7; 84.112(e),"Consumption cap falls to 90,761,495 MTEVe; reclaimed refrigerant required to service supermarkets, transport, ice makers",scheduled
2034-01-01,Fourth step: cap at 20% of baseline,40 CFR 84.7,"Consumption cap 60,507,663 MTEVe",scheduled
2036-01-01,Final step: cap at 15% of baseline,40 CFR 84.7,"Consumption cap 45,380,747 MTEVe",scheduled