Clean Truck Check - Referee Referral Required Documents
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Refer to the supporting document checklists below for your specific Clean Truck Check Referee request:
Action Type | Required Referee Checklist | Please select this action if... |
State-directed Referee Inspection / “Referee Referral” OBD test result
| You received a "Referee Referral" OBD result, CARB Enforcement citation, Notice to Submit to Testing (NST) letter, or other CARB Enforcement action.
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Alternative Fuel System Retrofit Verification |
| The vehicle fuel type has been converted to natural gas, propane, ethanol, methanol, or other non-diesel or non-gasoline fuel, and includes any of these fuels used in combination with each other.
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Credentialed Tester Not Available | No testers are available within a reasonable travel distance of your normal travel routes, or type of service is limited.
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Engine Change Verification | The vehicle has had an engine change or engine swap, which is the installation of an engine that is different from the one which was originally installed in the vehicle.
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Motor Home Conversion Verification | Verification to ensure a vehicle converted into a motorhome aligns with CARB's motorhome definition.
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Parts Unavailability Compliance Time Extension Request and Emission Control Label (ECL) verifications | A compliance time extension is requested because the part(s) needed for the repair(s) to pass the emissions compliance test, by the vehicle’s compliance deadline, is/are unavailable.
Also, select this action if the engine manufacturer is unable to provide a replacement ECL and/or engine information.
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Test Incompatibility / Alternative Test Procedure | A vehicle is unable to complete a typical Clean Truck Check emissions compliance test due to unusual vehicle configurations, design, or other inspection incompatibility.
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Test Result Dispute | The vehicle owner disputes an inspection result and requests an independent evaluation of a vehicle’s compliance status.
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