Data / Federal rules / 2026-06665
Protection of Stratospheric Ozone: Listing of Substitutes Under the Significant New Alternatives Policy Program in Refrigeration and Air Conditioning and Fire Suppression; Supplemental Notice of Proposed Rulemaking
The Environmental Protection Agency published this proposed rule in the Federal Register on April 6, 2026. Comments closed on May 6, 2026.
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What the agency says
Pursuant to the U.S. Environmental Protection Agency's Significant New Alternatives Policy program, this action proposes to list the refrigerant 2,3,3,3-tetrafluoropropene, also known as HFO- 1234yf, as acceptable, subject to use conditions, in the motor vehicle air conditioning end-use for retrofit of heavy-duty pickup trucks and complete heavy-duty vans. This action supplements the Agency's November 10, 2025, proposal with respect to the proposed listings in the motor vehicle air conditioning end-use for retrofit of heavy-duty pickup trucks and heavy-duty vans (both complete and incomplete vans). The EPA is also supplementing that proposal to clarify the intended scope of that proposed rule. The EPA is providing an opportunity for public comment on the additional listing and the clarification. The EPA is not reopening the comment period for any portions of the November 10, 2025, proposal which are not explicitly addressed in this supplemental proposal.
Key facts
- Document number
- 2026-06665
- Type
- Proposed rule
- Action
- Supplemental proposed rule
- Agency
- Environmental Protection Agency
- Published
- April 6, 2026
- Comments due
- May 6, 2026
- Dates
- Comments on this supplemental proposal must be received on or before May 6, 2026 unless a public hearing is held. If a public hearing is held, comments on this supplemental proposal must be received on or before 30 days after the date of the public hearing. Public hearing: Any party requesting a public hearing must notify the contact listed in the FOR FURTHER INFORMATION CONTACT section, which is Emily Maruyama at email address: [email protected] by 5 p.m. Eastern Daylight Time on or before April 13, 2026. If a public hearing is held, it will take place on or around April 21, 2026. Please
- Docket
- EPA-HQ-OAR-2024-0503; FRL-12207-03-OAR
- Regulation ID (RIN)
- 2060-AW45
- Code of Federal Regulations
- 40 CFR 82
- Topics
- Administrative practice and procedure; Air pollution control; Chemicals; Environmental protection
- Pages
- 11
Other documents from the Environmental Protection Agency
Everything from the Environmental Protection Agency · Rules on administrative practice and procedure · Rules on air pollution control · Rules on chemicals · Published in April 2026
Read from the Federal Register API, last updated 2026-10-23. The document on federalregister.gov is the official record; dates and dockets can change through later corrections. Free to reuse with credit to SpecStream under CC BY 4.0.