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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
Part 390 § 390.23 Relief from regulations How do I need to identify my vehicle when providing direct assistance? What paperwork must I carry? FMCSA-RG-390.23-FAQ012 Emergency Declarations
Part 390 § 390.23 Relief from regulations What services and supplies are covered by an emergency declaration? FMCSA-RG-390.23-FAQ007 Emergency Declarations
§ 390.23 Relief from regulations Do I need to stop at weigh stations when operating under a declared emergency exemption? FMCSA-RG-390.23-FAQ013 Emergency Declarations
What are the differences in the technical specifications in the 1988 automatic onboard recording device (AOBRD) Rule (49 CFR 395.15) and the Electronic Logging Device (ELD) rule? FMCSA-ELD-395-AOBRD-and-ELD-FAQ-RESCINDED ELD Guidance
Cross Border Transportation FAQs FMCSA-ELD-Cross-Border-Transportation-FAQs(2018-04-09)-CORR1-RESCINDED ELD Guidance
Is Your Device Compliant? FMCSA-HOS-ELD-TECH-395-FAQ98 ELD Guidance
What is the restriction identified on a Commercial Driver’s License (CDL) for a U.S. driver when they are not permitted to operate in the Canada for medical reasons? FMCSA-BOR-CDL-383-FAQ004 Cross-border CDL requirements
How will the U.S. ELD rule apply to a Canada/Mexico domiciled company operating a commercial rental truck in the United States? FMCSA-BOR-HOS-ELD-395-FAQ005 Cross Border Transportation ELDs
Must a Canada or Mexico domiciled motor carrier use an ELD that (1) meets the U.S technical specifications and (2) is self-certified and registered with FMCSA to present hours of service when operating in the U.S.? FMCSA-BOR-HOS-ELD-395-FAQ003-RESCINDED Cross Border Transportation ELDs
What must a Canada/Mexico domiciled motor carrier’s driver do if an ELD malfunction prevents presenting HOS to a safety official at roadside by electronic data transfer, display screen or printout? FMCSA-BOR-HOS-ELD-395-FAQ004 Cross Border Transportation ELDs