Knowledge Center for the In-Use Off-Road Diesel-Fueled Fleets Regulation
This page last reviewed April 11, 2016
In December 2011, major amendments to the Off-Road Diesel Vehicle Regulation, which include delaying the first compliance date to no earlier than January 1, 2014, became effective. The changes to the regulation are reflected in the fact sheets, advisories, and answers to frequently asked questions below.
- Requirements in Effect Now - Enforcement and
- Advisory 377: Limits on Idling
- Advisory 378: Dealer/Seller Disclosure
- Advisory 391: Written Idling Policy
- Advisory 394: Reporting Vehicles
- Advisory 12-02: Annual Reporting for Large Fleets Due March 1, 2012
- Advisory 12-08: New Labeling Requirements Effective January 1, 2013
- Advisory 12-25: On-Road Vehicles with Two Engines Were Required to Report by March 1, 2012 (This is an updated version of the old advisory 12-02 B)
- Advisory 14-1: Enforcement of the In-Use Off-Road Diesel Vehicle Regulation (Revision of Mailout# MSC 13-25)
Free Training Seminars
Frequently Asked Questions (FAQs)
- Applicability Flow Chart: Determine if your vehicle is covered under the Off-Road Diesel Vehicle Regulation.
- General Applicability: Determine if your vehicles are exempt due to the personal use, snow removal, job corps, or other exemptions.
- Agricultural Equipment: Equipment used in agricultural operations may have special exemptions in the regulation.
- Electric Ground Support Equipment (GSE) at Airports: Electric GSE at airports may be reported for partial credit towards the emissions requirements.
- Portable Equipment: Self-propelled off-road diesel vehicles that may require registration as portable equipment.
- Rail and Track Equipment: How to determine if your rail or track vehicle is covered by the regulation.
- Two-Engine Vehicles: How to determine which regulation applies to both engines of two-engine vehicles, including those with an on-road engine.
- Workover Rigs: How to determine if your rig is considered a workover rig in the off-road regulation.
- Yard Trucks: How to determine which regulation applies to your yard truck.
- Emission Factors: Explanation of emission factors, fleet averages, and sample calculations.
- Fleet Portions: Explanation of fleet portions and how they report and comply.
- Fleet Size - Private Fleets: How to determine fleet size for privately owned fleets.
- Fleet Size - Public Fleets: How to determine fleet size for federal, state and local agencies.
- Horsepower: Explanation of maximum horsepower and how it can be determined.
- Model Year: Explanation of engine model year and how it can be determined.
- Specialty Vehicles: Explanation of specialty vehicles and their requirements.
- Requirements and Compliance Questions
- Adding Vehicles: Requirements and restrictions on adding vehicles to a fleet.
- Awaiting Sale Vehicles: Explanation of how awaiting sale vehicles are treated.
- Best Available Control Technology (BACT): An explanation of one method of satisfying the regulation’s compliance requirements.
- Best Available Control Technology (BACT) Exemptions: A way of satisfying the regulation's compliance requirements.
- Captive Attainment Area Fleets: Explanation of compliance and reporting for fleets in the areas of the state with the cleanest air.
- Compliance Overview: Overview of off-road regulation requirements, including those in effect now and future requirements.
- Compliance Snapshot: A compliance tool in DOORS that shows a fleet's compliance status.
- Disclosure: What information must be disclosed to the buyer when selling a vehicle.
- Early Credit: Types of credit available to fleets before their first compliance year.
- Emergency Use: Emergency use vehicles may be exempt from some aspects of the off-road regulation.
- Fleet Average: An explanation of one method of complying with the regulation’s emission performance standards.
- Idling Policy Guidance: Information on what fleets should include in their written idling policies.
- Labeling Vehicles: Requirements for EIN labeling on vehicles, including label specifications.
- Low-Use Vehicles: Explanation of the low-use provisions, and how fleets may utilize these provisions to reduce compliance requirements.
- Manufacturer Delays: What to do if equipment needed for compliance is delayed.
- New Fleets: Requirements for fleets newly formed in-state or a fleet that enters California.
- Off-Road Engine Tier Life: Explanation of the length of time that an off-road engine tier may remain in a fleet.
- Optional Compliance Schedule for Fleets with 500 Horsepower or Less: Explanation of optional, simpler compliance option for the smallest fleets.
- Order of Best Available Control Technology (BACT): An explanation of the order in which turnover must be taken in order to accrue BACT credit.
- Potential Fines: Description of potential fines for noncompliance and where fine money goes.
- Record Keeping: Explanation of the record keeping requirements.
- Rental/Leased Vehicles: How to incorporate rental/leased vehicles into the Off-Road Regulation.
- Reporting Requirements: Explanation of the reporting requirements for all fleets.
- Rounding Provision: Explanation of the how the rounding provision works and when it applies.
- ROAR and Annual Reporting: Explanation of the Responsible Official Affirmations of Reporting (ROAR) form and annual reporting requirements for all fleets.
- Transfer of Ownership: Requirements for transferring ownership of a fleet or fleet portion.
- Vehicles Used for Parts: Vehicles used for parts may be exempt from some regulatory requirements.
- Water-Well Drilling Rig Vehicles (Guidance): Exclusive emergency operation requirements for two-engine water-well drilling rigs operating in California
- Water-Well Drilling Rig Frequently Asked Questions: Description of the requirements for both in-state and out-of-state two-engine water-well drilling rigs, including the exemptions for those operating exclusively for emergency purposes, such as a drought State of Emergency.
- Diesel Emission Control Systems (DECS)/Retrofit Devices
- Conditionally Verified DECS: Use of conditionally verified Diesel Emission Control Strategies for compliance with the off-road regulation.
- Credit for VDECS: Explanation of the credit available in the regulation for installing verified retrofits.
- Excess PM VDECS Credit Provisions: How to install extra or early VDECS under either the off-road or truck and bus regulation to generate excess credits for the other regulation.
- Using Unverified Exhaust Retrofits: What to do if you are using an unverified exhaust retrofit.
- VDECS: Explanation of what a VDECS is and how they work.
- VDECS Removal: What happens if a VDECS fails and/or is removed.
- On-road Engines and Off-road Vehicles
- Incentive Programs
- Incentive Funding: Explanation of how compliance credits are awarded for vehicles/engines/retrofits funded through incentive programs (Moyer, Showcase, SEP and other funds).
DOORS User Guides
The User Guides for DOORS are currently being updated. Once updates on a specific user guide is completed, they will be posted here. Please check back regularly for the user guide you're searching for.
- Initial Reporting
- Initial Reporting
- How to Update DOORS Log-In and Contact Information
- How to Report with Missing Information
- How to Report Fleet Portions or Multiple Fleets
- How to Report Vehicles with Two Engines
- How to Report Vehicles with Non-Standard or Non-Diesel Engines
- Reporting with Repeating Serial Numbers
- Viewing EINs and Printing or Exporting Vehicle and Engine Data
|The forms below are to be used to either request updates to information in a fleet's DOORS account that is not available for the fleet owner to update directly, or to submit information to ARB to complete annual reporting requirements.|
- Annual Reporting Forms
- Responsible Official Affirmation of Reporting (ROAR): Required for large fleets beginning March 1, 2012.
- Hour Meter Reading Log for Designated Low-Use Vehicles Operated Inside and Outside of California: Required for large fleets beginning March 1, 2012 for vehicles designated as low-use that operate both inside and outside of California.
- Hour Meter Reading Log for Vehicles Designated as Agricultural: Required for large fleets beginning March 1, 2012 for vehicles designated as agricultural (used for agricultural purposes 51-99% of the time).
- Specialty Vehicle: Use this form to apply for a specialty vehicle designation.
- Request for a Change in DOORS Information
- Modifying Parent Fleet Assignments: Use this form to add a parent fleet, choose a different parent fleet due to a change in common ownership or control, or split your fleet into fleet portions.
- Changing Contact Information: Use this form to request changes to your fleet's contact information, including a request for a new username/password.
- Transfer of Ownership for a Fleet or Fleet Portion: Use this form to transfer ownership of a fleet or fleet portion in DOORS (i.e., after purchase/acquisition of a fleet or fleet portion).
- Adding a Vehicle with an Existing EIN: Use this form to request to add a vehicle with an existing EIN to your fleet when the previous owner has not sold the vehicle in DOORS.
- Vehicle/Engine Information of Previously Reported Vehicles: Use this form to request changes to vehicle or engine information originally reported by a previous owner (i.e., the vehicle was purchased with an existing EIN, but some of the vehicle or engine information is incorrect).
(All documents are provided in Adobe Acrobat (PDF) unless otherwise indicated.)