STATE OF CALIFORNIA
CALIFORNIA ENVIRONMENTAL PROTECTION AGENCY
CALIFORNIA AIR RESOURCES BOARD
REGULATION FOR IN-USE OFF-ROAD DIESEL-FUELED FLEETS
RESPONSIBLE OFFICIAL AFFIRMATION OF REPORTING (ROAR) FOR ANNUAL REPORTING
MSCD/HDORSB-143 (REV. 05/2020) PAGE 2 OF 3
INSTRUCTIONS AND DEFINITIONS
Submit the completed form to DOORS@arb.ca.gov, fax to (916) 322-3923, or mail to: California Air
Resources Board, Attention: Off-Road Diesel Reporting, MSCD, Mail Stop 5B, PO Box 2815,
Sacramento, CA 95812.
With the submittal of this form, you are affirming that the information you have reported to the California
Air Resources Board (CARB) is complete, accurate, and true, and that your fleet is in compliance with all
aspects of the regulation, codified at California Code of Regulations, title 13, section 2449. This includes
reporting low-use, agriculture, and outside hour meter readings for the previous year, if applicable.
For questions regarding this form, contact the DOORS Hotline at: (877) 59DOORS (877-593-6677).
Responsible Official: One of the following: (A) For a corporation: A president, secretary, treasurer,
or vice president of the corporation in charge of a principal business function, or any other person
who performs similar policy or decision-making functions for the corporation. (B) For a partnership or
sole proprietorship: a general partner or the proprietor, respectively. (C) For a municipality, state,
federal, or other public agency: either a principal executive officer or ranking elected official. For the
purposes of this part, a principal executive officer of a federal agency includes the chief executive
officer having responsibility for the overall operations of a principal geographic unit of the agency
(e.g., a Regional Administrator of the U.S. EPA). [Cal. Code regs., Title 13 § 2449, subd. (c) (44)].
Designated Official: This is someone that the Responsible Official has designated as the person
responsible for signing official forms by submitting the Designated Official form MSCD/HDORSB-178
to CARB. Once on file, the form does not need to be re-submitted except to designate a new person
other than the Responsible Official as the person allowed to sign official forms for the fleet.
Annual Reporting Year: A signed MSCD/HDORSB-143 is due from each fleet by March 1st of each
year as a part of a fleet’s annual reporting requirements. This affirmation is for each vehicle in the fleet as
it was on December 31st of the previous year. For example, you would submit the
MSCD/HDORSB-143
for “Annual Reporting Year” by March 1, 2019 which affirms that all the information about your fleet as it
was on December 31, 2018, was reported correctly and is true and accurate. [Cal. Code Regs., Title 13,
§ 2449, subd. (g)(2)(A).]
Captive Attainment: Captive Attainment area fleet is a fleet or fleet portion in which all of the vehicles in
the fleet or fleet portion operate exclusively within the following counties: Alpine, Colusa, Del Norte,
Glenn, Humboldt, Lake, Lassen, Mendocino, Modoc, Monterey, Plumas, San Benito, San Luis Obispo,
Santa Barbara, Santa Cruz, Shasta, Sierra, Siskiyou, Tehama, Trinity, Yuba, and the portion of Sonoma
County that lies within the boundaries of the North Coast Air Basin. State and federal fleets are
considered large fleets, regardless of their total horsepower, and therefore cannot be Captive Attainment
area fleets. A fleet will have stated in its initial reporting to CARB that it is Captive Attainment, and that
must be reflected in DOORS. [Cal. Code Regs., Title 13, § 2449, subd. (c)(6).]
DOORS Fleet ID Number: This number is assigned by CARB when you initially created your fleet in
DOORS. If you do not have this number, contact the DOORS Hotline. If the Responsible Official is the
same person for multiple fleets, they may submit one Responsible Official Affirmation of Reporting
(ROAR) form MSCD/HDORSB-143 with the DOORS IDs of all those fleets listed on the form.
Company/Agency Name: The legal name of the entity, business, organization, agency, or individual that
owns and has possession of each vehicle in the fleet, not a third party (i.e., consultants, distributors, sales
representatives, etc.).
