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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
Are part 382 alcohol and drug testing requirements applicable to firefighters in a State which gives them the option of obtaining a CDL or a non-commercial class A or B license restricted to operating fire equipment only? FMCSA-D&A-382.103-Q03 Applicability of part 382 to firefighters
Does the FMCSA issue formal medical decisions as to the physical qualifications of drivers on an individual basis? FMCSA-MED-391.47-Q1 Resolution of Medical Conflicts
Recordkeeping requirements for electronic HOS files FMCSA-ELD-HOS-395.15-Q01 Recordkeeping requirements for electronic HOS files
What post-accident alcohol and drug testing requirements are there for foreign drivers involved in accidents occurring outside the United States? FMCSA-D&A-382.303-Q05 Post-accident drug testing requirements for foreign drivers