EPA issued a proposed rule Protection of Stratospheric Ozone: Revisions to the Refrigerant Management Program’s Extension to Substitutes. This action proposes to revisit the Agency’s recent approach to regulating appliances containing substitute refrigerants such as hydrofluorocarbons (HFCs) by proposing to rescind the November 18, 2016 extension of the leak repair provisions to appliances using substitute refrigerants. This proposal also requests public comment on rescinding other provisions that were extended to substitute refrigerants.