The California DMV began the new Clean Air Vehicle (CAV) decal program on January 1, 2019 for qualifying vehicles that have never received a CAV decal. … CAV Decal Expirations. CAV Decals Issued on Will be Valid Until Decal Color January 1, 2020 – December 31, 2020 January 1, 2024 Orange 3 more rows • Apr 19, 2019