Who Needs CARB Compliance in California?

Many commercial heavy-duty diesel trucks and transport refrigeration units operating in California must meet CARB rules. Requirements depend on engine year, mileage, equipment type, and program enrollment — not only where you are plated.

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Overview

CARB Applies to More Than California-Plated Trucks

California Air Resources Board (CARB) regulations apply to heavy-duty diesel vehicles that operate within the state, regardless of where the truck is registered. Out-of-state carriers making deliveries, pickups, or pass-through trips may still need CARB credentials.

If your fleet enters California rarely — typically once per calendar year — a one-time 5-day permit may be the right short-term option. Regular or repeated California operations require full CARB program compliance.

Commercial heavy-duty diesel trucks over 14,000 lbs GVWR
Transport refrigeration units (reefers) on California routes
Out-of-state carriers with occasional California trips
Owner-operators and freight companies alike

Apply for 5-Day Permit

14,000+ lbs GVWR threshold

2010+ Engine year for entry

1× 5-day pass per year

All Plated states covered

Carrier Types

Common Scenarios That Require CARB Action

Interstate Carriers

Trucks registered in other states that deliver, pick up, or pass through California on occasional routes.

Owner-Operators

Single-truck operators entering California who need a compliant path for rare trips.

Fleet Operators

Companies with multiple units where some vehicles are not yet fully CARB enrolled.

Reefer Operations

Transport refrigeration units may need additional CARB credentials beyond a 5-day pass.

Urgent Trips

Can I Enter California Urgently Without Clean Truck Check?

Yes — if your truck is not fully CARB-compliant, you can use a one-time 5-day permit for urgent or rare trips. This temporary permit allows your truck to operate legally in California while staying compliant with emissions enforcement.

Start your expedited order online with your load date and vehicle details if your permit timeline is urgent. Expedited processing targets same business day when you submit early enough and your case is eligible.

Order Expedited Permit — $115

Find the Right CARB Compliance Path

Whether you need a 5-day pass or full program guidance, start your order online today.

Get My 5-Day Permit Now