Heavy-Duty In-Use Compliance Programs
CARB's In-Use Compliance Programs are a key strategy to aid California in meeting ambient air quality standards. The Heavy Duty In-Use Compliance section is responsible for multiple programs including: Heavy-Duty In-Use Compliance Program (HDIUC), Off-Road In-Use Compliance (ORIUC), and the Manufacturer-Run Heavy-Duty In-Use Testing Program (HDIUT). One of the main goals of these programs is to ensure that heavy-duty vehicles/engines meet required emissions standards throughout their useful lives.
More about this program