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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
For the purposes of § 393.89, would a spline and yoke that is secured by a nut be considered a sliding connection? FMCSA-VEH-393.89-Q01 What is a sliding connection under § 393.89?
At what GVWR, as assigned by a manufacturer, does the requirement to comply with the financial responsibility regulations begin? FMCSA-INS-387.3-Q001 GVWR at which Financial Responsibility Requirements apply
Can military time be used on the grid portion of the driver’s record of duty status? FMCSA-HOS-395.8-Q17 Hours of Service Records of Duty Status
To what extent would the windshield and/or mirrors of a vehicle have to be damaged in order for it to be considered ‘‘disabling damage’’ as used in the definition of an accident in § 390.5T? FMCSA-RG-390.5T-Q013 Extent of definition of “disabling damage”
Is there a prescribed or specified form that must be used when a driver applies for employment, or can a carrier develop its own application? FMCSA-DQ-391.21-Q002 Driver employment application
What does “servicing” of the field operations of the natural gas and oil industry cover? FMCSA-HOS-395.1-Q06 Hours of Service
Do the Federal Motor Carrier Safety Administration’s (FMCSA) alcohol and controlled substances testing regulations apply to employers and drivers in U.S. territories or possessions such as Puerto Rico and Guam? FMCSA-D&A-382.103-Q06 Applicability of drug and alcohol testing requirements to employers and drivers domiciled in the U.S. territories or possessions such as Puerto Rico and Guam
Guidance on whether an employee who holds a CDL and may drive occasionally must be in a random testing pool FMCSA-D&A-382.305-Q02 Guidance on whether an employee who holds a CDL and may drive occasionally must be in a random testing pool
Are automatic on-board recorders (AOBRDs) required to be designed and maintained to prevent team drivers in a non-driving duty status from making updates to their electronic record of duty status while the vehicle is in motion? FMCSA-ELD-HOS-395.15-Q04 When a non-driver may update their eROD
May a driver record sleeper berth time as off-duty time on line one of the record of duty status? FMCSA-HOS-395.1-Q26 Hours of Service Exceptions