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Regulatory Guidance

Welcome to the FMCSA Guidance Portal. This web portal is a searchable, indexed database that contains and links to all guidance documents in effect from the Federal Motor Carrier Safety Administration. The guidance documents lack the force and effect of law, unless expressly authorized by statute or incorporated into a contract.

To comment on any guidance document, or to request issuance, reconsideration, modification, or rescission of any guidance document, please identify the guidance document in your request and send it to: FMCSAguidance@dot.gov. NOTE: The FMCSAguidance mailbox is not intended to serve as a mailbox for general inquiries. For inquiries that go beyond the limited purpose of the FMCSAguidance mailbox, please call FMCSA's Information Line (800-832-5660) or visit FMCSA's "Contact Us" page to send your inquiry to the appropriate mailbox.

Subject Agency Identifier Topic Issued Date
If the vehicle registration for a commercial motor vehicle (CMV) reflects a model year of 2000 or newer, but the vehicle was manufactured without an electronic control module (ECM), is the carrier required to comply with the Electronic Logging Device... FMCSA-HOS-ELD-395-FAQ012(2017-03-12)-CORR1 ELD Guidance
May a driver who uses an automatic on-board recording device amend his/her record of duty status during a trip? FMCSA-ELD-HOS-395.15-Q02 Amending AOBRD records
Driver Qualifications; Regulatory Guidance Concerning the Use of Computerized Employer Notification Systems for the Annual Inquiry and Review of Driving Records, 80 Fed. Reg. 13069 FMCSA-FR-80FR13069.2015.03.12 enforcement
Does the use of a third-party computerized system that provides motor carriers with a complete department of motor vehicle report for every State in which the driver held a commercial motor vehicle operator’s license or permit when a driver is enrolled in FMCSA-DQ-391.25-Q004 Driving record annual inquiring
What information is required to be displayed on the AOBRD? FMCSA-ELD-HOS-395.15-Q05 Information required to be displayed on an AOBRD
Must an AOBRD be capable of providing a hardcopy printout? FMCSA-ELD-HOS-395.15-Q06 AOBRD printout requirements
Hours of Service of Drivers of Commercial Motor Vehicles; Regulatory Guidance for Oilfield Exception. FMCSA-FR-78FR48817-2013.08.12 Oilfield operations exceptions from Hours of Service requirements
Application of Exceptions FMCSA-FR-77FR33098.2012.06.05 Application of Exceptions
Purpose, Use and Effect of the Field Operations Training Manual; Notice of Interpretation of Internal Agency Document, 74 Fed. Reg. 24897 FMCSA-FR-74FR24897.2009.05.26 general
Is the operation of fire trucks and rescue vehicles in interstate commerce by a private firefighting company subject to the FMCSRs when the company provides its services under contract to Federal or State agencies? FMCSA-RG-390.3T-FAQ026 Applicability of FMCSRs to private firefighting companies