The U.S. Environmental Protection Agency (EPA) is proposing to amend the National Volatile Organic Compound (VOC) Emission Standards for Aerosol Coatings, which establishes reactivity-based emission standards for the aerosol coatings category (aerosol spray paints) under the Clean Air Act (CAA). In this action, the EPA is proposing to update coating category product-weighted reactivity limits for aerosol coatings categories; add new compounds and reactivity factors (RFs); update existing reactivity values; revise the default RF; amend the thresholds for compounds regulated by this document; and add electronic reporting provisions.