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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 I have a truck that is not normally used commercially and a local charitable group wants me to take donated clothing and supplies to the impacted area. What do I need to know? FMCSA-RG-390.23-FAQ010 Emergency Declarations
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
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 FMCSA-ELD-395-AOBRD-and-ELD-FAQ-RESCINDED ELD Guidance
Cross Border Transportation FAQs FMCSA-ELD-Cross-Border-Transportation-FAQs(2018-04-09)-CORR1-RESCINDED ELD Guidance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
Do I also need to file for authority to operate within the municipalities and commercial zones along the border in the U.S. if I have long-operating operating authority? FMCSA-BOR-MX LONG-HAUL-FAQ001 Mexico-domiciled motor carrier cross-border long haul operations
What happens if cellular network limitations prevent an ELD from transferring data during a U.S. roadside inspection for a Canada/Mexico domiciled motor carrier’s driver? FMCSA-BOR-HOS-ELD-395-FAQ001 Cross Border Transportation ELDs
I don't have authority from the Mexican Government's Secretaría de Comunicaciones y Transportes (SCT) yet. Can I still make application for OP-1(MX) or OP-2 authority? FMCSA-BOR-REG-FAQ008 Registration requirement for Mexico-domiciled motor carriers
My trucks have both Mexico and U.S. license plates. Can I put my MX Number and my MC Number on the same truck? FMCSA-BOR-MX-FAQ005 Vehicle marking requirement for Mexico-domiciled motor carriers
Can a Mexico-domiciled carrier lease its equipment to another Mexico-domiciled company for operations in the United States? FMCSA-BOR-LEASING-376-FAQ002 Leasing requirement for Mexico-domiciled motor carriers