Glossary “Clean Air Act (CAA)” Definition:
A term used for Clean Air Act and its Amendments (CAAA). A Title IV amendment, signed into law in 1990 , that established national policy relative to the reduction and elimination of ozone-depleting substances. The act also includes requirements for oxygenated fuels programs in CO non-attainment areas and reformulated gasoline programs in certain ozone non-attainment areas.