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OFF-ROAD DIESEL REGULATION
Regulation Text


BACKGROUND

On July 26, 2007, the California Air Resources Board (CARB) adopted the Regulation for In-Use Off-Road Diesel-Fueled Fleets (Off-Road Diesel Regulation) to reduce diesel particulate matter (PM) and oxides of nitrogen (NOx) emissions from in-use (existing) off-road heavy-duty diesel vehicles in California. These vehicles are used in construction, mining, industrial operations and other industries.

The Regulation applies to:

  • Vehicles with off-road engines of 25 hp or greater.
  • Workover rigs.
  • 2-engine cranes.
  • 2-engine water well drilling rigs
  • 2-engine vehicles with auxiliary engines of greater than or equal to 50bhp that
    • Are not subject to the Public Agencies & Utilities (PAU) fleet rule
    • Are not sweepers subject to Truck & Bus rule
    • Do not contain a Tier 0 auxiliary engine
The Regulation does not apply to:
  • Locomotives
  • Commercial marine vessels and marine engines
  • Recreational off-highway vehicles
  • Combat and tactical support equipment
  • Stationary equipment
  • Personal use motor homes or recreational vehicles
  • Portable engines, except auxiliary engines on 2-engine vehicles
  • Equipment used exclusively for agricultural operations
  • Implements of husbandry
  • Certain 2-engine vehicles
  • 2-engine street sweepers subject to Truck & Bus rule
  • Equipment subject to the mobile Cargo Handling
  • Equipment (CHE) rule
  • Equipment owned and operated for personal, non-commercial, and non-governmental use
  • Vehicles awaiting sale (i.e., dealers)

OVERVIEW FACT SHEET (English or Español)
REGULATION TEXT



REQUIREMENTS

The Off-Road Diesel Regulation:

  • Imposes limits on idling, requires a written idling policy, and requires a disclosure when selling vehicles;
  • Requires all vehicles to be reported to CARB in the online reporting system DOORS and labeled;
  • Restricts the adding of older vehicles into fleets starting on January 1, 2014; and
  • Requires fleets to reduce their emissions by retiring, replacing, or repowering older engines, or installing Verified Diesel Emission Control Strategies, VDECS (i.e., exhaust retrofits).

The Off-Road Diesel Regulation’s restricts adding vehicles with older tier engines:
  • BAN ON ADDING TIER 0 ENGINES – Effective January 1, 2014, a fleet may not add a vehicle with a Tier 0 engine to its fleet.
  • BAN ON ADDING TIER 1 ENGINES – Also effective January 1, 2014, for large and medium fleets, and January 1, 2016 for small fleets, a fleet may not add any vehicle with a Tier 1 engine. The engine tier must be Tier 2 or higher.
  • BAN ON ADDING TIER 2 ENGINES – Beginning January 1, 2018, for large and medium fleets, and January 1, 2023, for small fleets, a fleet may not add a vehicle with a Tier 2 engine to its fleet. The engine tier must be Tier 3 or higher.



REPORTING

Off-road diesel vehicle owners are required to report their applicable diesel vehicles into DOORS, an online reporting system.

Beginning in 2009, all applicable off-road diesel vehicles were required to be reported to CARB. When a diesel vehicle is reported in DOORS, the engine is assigned a unique EIN. The vehicle must be labeled within 30 days of receiving this EIN. You can learn more about labeling and reporting in DOORS on the DOORS RESOURCES page. This page contains userguides and training videos to help you report in DOORS.

DOORS REPORTING SYSTEM ►
DOORS RESOURCES ►



FREQUENTLY ASKED QUESTIONS

Click a topic from the left sidebar to view available resource documents. These documents answer commonly asked questions regarding the Off-Road Diesel Regulation:

Overview

Compliance Overview: Overview of off-road regulation requirements, including those in effect now and future requirements.

Regulation Overview (English or Español): Explanation of the applicability of the rule and a summary of requirements.

Applicabilty

Agricultural Equipment (English or Español): 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.

General Applicability: Determine if your vehicles are exempt due to the personal use, snow removal, job corps, or other exemptions.

Portable Equipment (English or Español): 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: Determine if your vehicle is a two-engine vehicle

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.

Definitions

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.

Compliance

Adding Vehicles (English or Español): Requirements and restrictions on adding vehicles to a fleet.

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: Determine if your vehicle falls within certain California counties that may affect the fleet size designation.

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.

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 (English or Español): 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.

Record Keeping: Explanation of the record keeping requirements.

Rounding Provision: Explanation of the how the rounding provision works and when it applies.

Reporting

Awaiting Sale Vehicles: Explanation of how awaiting sale vehicles are treated.

Disclosure: What information must be disclosed to the buyer when selling a vehicle.

Labeling Vehicles (English or Español):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.

Rental/Leased Vehicles: How to incorporate rental/leased vehicles into the Off-Road Regulation.

Reporting Requirements: Explanation of the reporting requirements for all fleets.

ROAR and Annual Reporting (English or Español): 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.

Two-Engines Vehicles

Two-Engine Vehicles: Determine if your vehicle is a two-engine vehicle

Repowers Using On-road Engines: On-road engines may be used in off-road vehicles to lower emissions.

Enforcement Advisory 381: Enforcement of requirements to use on-road certified engines in on-road registered vehicles.

Retrofits

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.

Funding and Other Topics

Incentive Funding: Explanation of how compliance credits are awarded for vehicles/engines/retrofits funded through incentive programs (Moyer, Showcase, SEP and other funds).

Manufacturer Delays: What to do if equipment needed for compliance is delayed.

Potential Fines: Description of potential fines for noncompliance and where fine money goes.

Vehicles Used for Parts: Vehicles used for parts may be exempt from some regulatory requirements.

Water-Well Drilling: Description of requirements for both in-state and out-of-state two-engine water-well drilling rigs, including the exemptions for those operating exclusively within the Counties of Fresno, Tulare, for emergency purposes, such as a drought State of Emergency.



FORMS

Responsible Official Affirmation of Reporting (ROAR)
Required for large fleets beginning in 2012, for medium fleets beginning in 2016, and for small fleets beginning in 2018.  Must be completed and submitted to CARB by March 1st each year annual reporting is required.

Designated Official
The Responsible Official will use this form to designate a person to be responsible for signing the ROAR and/or other forms required under the Off-Road Regulation.

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).



UPCOMING DEADLINES

JANUARY 1, 2021 - All fleets must meet emission performance and reporting requirements.

MARCH 1, 2021 - Deadline to complete annual reporting requirements, including the Responsible Official Affirmation of Reporting form.

JANUARY 1, 2023 - Small fleets may no longer add a vehicle with a Tier 2 engine to its fleet. The engine tier must be Tier 3 or higher. Medium and large fleets may not add tier 2 engines as of January 1, 2018.