PSIP Regulation Final Regulation Order: Amendments to HDVIP and PSIP Categorías Topics Enforcement Programs Enforcement of Clean Truck Check HD I/M Regulation Tipo Legal Document Contact HD Vehicle Enforcement Correo electrónico HDVehicleEnforcement@arb.ca.gov Teléfono (916) 229-0492 Related Resources California State of Emergency (January 7, 2025): Sale, Offer for Sale, and Importation of U.S. EPA Certified Portable Generators into California Test Method 435 Automated License Plate Reader