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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
How do authorized users sign up to access the Clearinghouse? FMCSA-D&A-CLEAR-382.711-FAQ003 Guidance on Authorized User Registration
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
What violation and return-to-duty (RTD) information must employers report to the Clearinghouse? FMCSA-D&A-CLEAR-382-FAQ016 Guidance on Employer Violation and RTD Reporting
How do owner-operators meet their Clearinghouse obligations? FMCSA-D&A-CLEAR-382.705-FAQ010 Guidance on how owner-operators meet their Clearinghouse obligations
What information is a medical review officer (MRO) required to provide when reporting a determination or verification? FMCSA-D&A-CLEAR-382.705-FAQ008 Guidance on MROs Reporting Information to the Clearinghouse
What is the Drug and Alcohol Clearinghouse (Clearinghouse) and what information does it contain? FMCSA-D&A-CLEAR-382-FAQ008 Guidance on what is the Drug and Alcohol Clearinghouse