What about out-of-state trucks and motorhomes?

Registration outside California does not, by itself, exempt a covered truck operating in the state. Motorhomes have different rules: registration state and qualifying use matter. Do not apply a general 'all RVs are exempt' rule.

Tell us the registration state, fuel type, GVWR, engine details and vehicle use before choosing a service. Confirm vehicle-specific exemption questions or notices with CARB.

Official source: CARB covered-vehicle and exemption overview.