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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
Suspension of Motor Carrier Operating Authority Registration for Invalid Process Agent (BOC-3) Filings (MC-RS-2019-0002) FMCSA-REG-366-SUSPENSION OF OPERATING AUTHORITY REGISTRATION FOR INVALID BOC-3 FILINGS Suspension of Operating Authority Registration for Invalid Process Agent Filings
Crash Preventability Determination Program, 84 FR 38087 FMCSA-FR-84FR38087.2019.08.05 crash preventability
Advisory: Declaring the Transportation of Anhydrous Ammonia and Class 3, Flammable Liquids When Filing FMCSA Registration. FMCSA-HM-ADVISORY.2019.06.05 Hazardous Materials
ELD Carrier-Driver Training FMCSA-HOS-ELD-TRAINING-395-FAQ3 ELD Guidance
ELD Provider Training FMCSA-HOS-ELD-TRAINING-395-FAQ4 ELD Guidance
Can Canadian and Mexican medical review officers (MROs) report verified positive test results and refusals to test to the Clearinghouse? FMCSA-D&A-CLEAR-40.121-FAQ001 Guidance on Canadian and Mexican MRO Reporting to the Clearinghouse
Will any information from the Clearinghouse appear in the National Highway Traffic Safety Administration’s National Driver Register? FMCSA-D&A-CLEAR-382-FAQ026 Guidance regarding the National Highway Traffic Safety Administration’s National Driver Register
How long will CDL driver violation records be available for release to employers from the Clearinghouse? FMCSA-D&A-CLEAR-382.719-FAQ001 Guidance on how long CDL driver violation records will be available for release to employers from the Clearinghouse
May employers report the results of drug or alcohol tests not required by the Department of Transportation (DOT) to the Clearinghouse? FMCSA-D&A-CLEAR-382-FAQ027 Guidance clarifying that non-DOT rest results may not be reported to the Clearinghouse
Does the final rule change any of the existing drug and alcohol program requirements in Part 40? FMCSA-D&A-CLEAR-382-FAQ028 Guidance clarifying that there is no change to the existing Part 40 drug and alcohol program requirements