This final rule removes undue regulatory burdens by adopting the provisions of U.S Department of Transportation (DOT) special permit (SP) 21287 to streamline the transportation of refrigerating machines-- including common household appliances like refrigerators, window- mounted air-conditioning units, and dehumidifiers--that contain small quantities of certain low flammability refrigerant gases.
Source
https://www.federalregister.gov/documents/2026/08/04/2026-15817/hazardous-materials-adoption-of-department-of-transportation-special-permit-21287Canonical document at the regulator. Always cite this URL — not the Vantage detail page — in compliance evidence.