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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
Must an AOBRD be capable of providing a hardcopy printout? FMCSA-ELD-HOS-395.15-Q06 AOBRD printout requirements
Do the Hazardous Materials Safety Permit requirements apply to U.S. territories such as Puerto Rico? FMCSA-HM-HMSP-385-FAQ008 Hazardous Materials Safety Permits
When are Level VI inspections required to be performed for international shipments of highway-route-controlled quantities of radioactive materials? FMCSA-HM-HMSP-385-FAQ012 Hazardous Materials Safety Permits
Why Is FMCSA requiring a Hazardous Materials Safety Permit? FMCSA-HM-HMSP-385-FAQ001 Hazardous Materials Safety Permits
How do I apply for a Hazardous Materials Safety Permit? FMCSA-HM-HMSP-385-FAQ002 Hazardous Materials Safety Permits
Where can I obtain the MCS-150B form? FMCSA-HM-HMSP-385-FAQ003 Hazardous Materials Safety Permits
What are carriers required to do to obtain and keep a Hazardous Materials Safety Permit? FMCSA-HM-HMSP-385-FAQ006 Hazardous Materials Safety Permits
Are government entities covered under the Hazardous Materials Safety Permit Regulations? FMCSA-HM-HMSP-385-FAQ007 Hazardous Materials Safety Permits
Do the permitting requirements apply to materials that have subsidiary hazards that come under the materials list, even if their primary hazard does not? Example: A Flammable Liquid, Class 3, is a subsidiary poison inhalation hazard. FMCSA-HM-HMSP-385-FAQ010 Hazardous Materials Safety Permits
What are the logistics for a permitted load that is transported by more than one mode? For example, a permitted load is transferred to an ocean vessel. FMCSA-HM-HMSP-385-FAQ009 Hazardous Materials Safety Permits