CA AB663

Eliminates the existing exemption for reclaimed hydrofluorocarbons from California's ban on high global warming potential (GWP) refrigerants, replacing it with a new "certified reclaimed refrigerant" exemption requiring refrigerants to be recovered from previously operational appliances, meet EPA specifications, and contain no more than 15% new hydrofluorocarbon by weight

Maintains existing GWP limits for bulk hydrofluorocarbons: 2,200 GWP maximum starting January 1, 2025; 1,500 GWP maximum starting January 1, 2030; and 750 GWP maximum starting January 1, 2033

Creates temporary exemptions for hydrofluorocarbons used in FDA-approved metered dose inhalers (expires December 27, 2030) and very low temperature refrigeration equipment operating below -58°F (expires January 1, 2028)

Expands criminal liability by narrowing the exemption criteria, making violations subject to existing air pollution penalties with fines deposited in the Air Pollution Control Fund

Takes effect immediately as an urgency statute to encourage reuse of reclaimed hydrofluorocarbons rather than disposal