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.

Fact Sheets

Requirements in Effect Now - Enforcement and Regulatory Advisories

Free Training Seminars

Course 504: In-Use Off-Road Diesel Vehicle Regulation Training

Frequently Asked Questions (FAQs)

Requirements and Compliance Questions
Diesel Emission Control Systems (DECS)/Retrofit Devices
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 Forms forms
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
Request for a Change in DOORS Information

(All documents are provided in Adobe Acrobat (PDF) unless otherwise indicated.)