Attention Contractors!

California Air Resources Board Issues Revised Enforcement Advisory for Off-Road Fleets and March 1 Deadline for Large Fleets to File Annual Responsible Official Affirmation of Reporting (ROAR)

California Air Resources Board (ARB) listserv message dated February 11, 2014:

A revised advisory, informing all off-road fleets as to how ARB staff will proceed with enforcement of the In-Use Off-Road Diesel Vehicle Regulation, is now available. The previous advisory, 13-25, inadvertently stated that beginning January 1, 2014, and until January 1, 2016, small fleets could only add to their fleet a vehicle with a Tier 1 engine if the vehicle had been previously reported and labeled with an Equipment Identification Number (EIN).  However, small fleets may continue to add vehicles with Tier 1 engines until January 1, 2016, regardless of reporting or EIN status.

The revised advisory Mail-Out #MSC 14-1 can be accessed from the In-Use Off-Road Diesel Vehicle website at

For additional information about complying with the In-Use Off-Road Diesel Vehicle Regulation, including fact sheets, advisories, answers to frequently asked questions, and DOORS user guides, please visit our Knowledge Center at, or call our DOORS helpline at 1-877-59DOORS (1-877-593-6677).


The regulation for In-Use Off-Road Diesel Vehicles first became effective under California law on June 15, 2008.  This regulation is intended to reduce harmful emissions from diesel powered construction, mining, and other industrial vehicles operating in California that have propulsion engines that are 25 hp or greater.  Fleets were required to initially report their off-road diesel vehicles to ARB in 2009 via DOORS.  In addition, fleet owners are currently subject to restrictions on unnecessary idling, and large fleets will be subject to accelerated replacement/repower requirements beginning July 1, 2014.

If you have any questions regarding the regulatory requirements, please contact the DOORS hotline at (877) 59-DOORS (877-593-6677) or by email at  For further information about the Off-Road Diesel Vehicle Regulation, please visit the off-road regulation website at  For further information on ARB’s diesel vehicle and equipment regulations, please visit the TruckStop website at

Reminder: Large Fleets - Next Annual Responsible Official Affirmation of Reporting (ROAR) Deadline - March 1, 2014

Annual Reporting Deadlines

Beginning in 2012 for large fleets, 2016 for medium fleets, and 2018 for small fleets, fleets must annually update and affirm their reporting information is correct. This annual update is required by March 1 of each year and must include a signed statement, called a Responsible Official Affirmation of Reporting (ROAR), affirming that the fleet information reported is accurate and that the fleet is in compliance. The next requirement for a ROAR is March 1, 2014 for large fleets (those with affected vehicles totaling over 5,000 horsepower).

In addition to the ROAR, as part of their annual reporting, large fleets with low-use vehicles (those operating in California no more than 200 hours per year) must also report engine hour meter readings for those engines. Similarly, large fleets with vehicles used a majority of the time (but not solely) for agricultural operations must also report hours of use for those vehicles each year as part of their annual reporting.

Large fleets must submit a ROAR, low-use engine hours, and agricultural use hours each year from 2012 to 2023. Medium fleets must do so each year 2016 to 2023, and small fleets must do so each year from 2018 to 2028.

Click here to see ARB Regulatory Advisory for additional information about Annual Reporting and here for the Diesel Off-road On-line Reporting System (DOORS) and User Guides.

This information is provided by the Construction Industry Air Quality Coalition.

CIAQC is a non-profit 501(c)(6) founded in 1989 by four southern California trade associations--Associated General Contractors of California, Building Industry Association of Southern California, Engineering Contractors Association and the Southern California Contractors Association.

These signatory contractor organizations, through the Southern California Industry Funds, created CIAQC to help their members understand and navigate the ever-increasing web of government environmental regulation under which they operate their businesses and build our communities, our infrastructure and the environmental systems that will enhance California’s future.

Today several organizations and individual construction firms throughout the state are active in CIAQC. Member associations now also include the Associated General Contractors America – San Diego Chapter, Inc., California Construction Trucking Association, United Contractors, and the California Rental Association.

CIAQC assists the construction industry and regulatory agencies in the development of environmental regulatory strategies that will balance the goals of a healthy environment and a healthy local economy with the least adverse impact on the construction industry.

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