CARB has approved amendments to the In-Use Off-Road Diesel-Fueled Fleets Regulation. You may need to take additional actions in 2023 to be compliant with new requirements beginning January 1, 2024. Please visit the Off-Road Regulation webpage for more information.

Attention: Please verify that all data you enter into DOORS is saved properly after entering and submitting the information. If you notice any discrepancies or if you have any questions, please send an email to letting us know about the issue. Please include the information that you were trying to enter but did not save properly and we will work to fix the issue. Thank you for your cooperation.

Most CARB staff are currently working remotely. Processing of paper forms received by mail or fax is limited. We highly encourage you to submit any paper forms by scanning or taking a photograph, and then sending it by email to

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Off-Road Diesel (ORD) Regulation

Guides for Initial Reporting:
   Off-Road Diesel Regulation
   Large Spark-Ignition Regulation

Large Spark-Ignition (LSI) Regulation

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Fleet Reporting

LSI Fleet:
The following fleets may be required to report.
Large forklift fleet: 26+ forklifts
Medium forklift fleet: 4 - 25 forklifts
Non-forklift fleet: 4+ non-forklifts

Off-road Diesel Fleet:
All existing off-road diesel fleets should have filed their initial report in 2009. If you are a new fleet, you must register your vehicles within 30 days per Section 2449(d)(4) of the regulation. If you are an existing fleet, you must report any new vehicles added within 30 days as per Section 2449(d)(6). For further guidance, please check
The Off-Road Zone for DOORS user guides.

To request changes to DOORS information, please visit the Forms area of our website.

DOORS Disclaimer

Report Non-Compliant Off-Road Fleet
Report Other Air Pollution Complaints

Still Have Questions? Contact ARB at or 1 (877) 59-DOORS (1-877-593-6677).
Hours of service: 8am-4pm Monday to Friday. Closed from 9:10am-10:00am and 1:00pm-2:00pm on Wednesdays for administrative meetings.