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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
If a medical review officer (MRO) changes a verified positive drug test result per 49 CFR Part 40, when must the MRO submit the change to the Clearinghouse? FMCSA-D&A-CLEAR-382.705-FAQ007 Guidance on when an MRO must report a changed result to the Clearinghouse
When are drivers subject to the DOT Drug and Alcohol testing requirements? FMCSA-D&A-382.103-FAQ003 Guidance on when a driver is subject to the FMCSA drug and alcohol testing requirements.
ELD Training Checklist for Motor Carriers: Understanding Your Device FMCSA-HOS-ELD-TRAINING-395-FAQ1 ELD Guidance
Brochure provides overview of the hours-of-service rules for drivers of passenger-carrying commercial motor vehicles. FMCSA-HOS-PASS-395-PASSENGER CARRIER HOURS OF SERVICE BROCHURE Passenger Carrier Hours of Service
May the CDL knowledge test be administered by a third party? FMCSA-CDL-383.75-Q01-RESCINDED Commercial Driver License Standards; Third Party Testing
Commercial Driver's License Standards, Requirements and Penalties; Notification of Updated Regulatory Guidance; Request for Comments, 84 Fed. Reg. 8464 FMCSA-FR-84FR8464-2019-03-08 Guidance for Commercial Drivers Licenses
Are drivers of non-military amphibious landing craft that are usually used in water but occasionally used on a public highway, such as those used for sightseeing tours, subject to the CDL requirements? FMCSA-CDL-383.3-Q11 Commercial Driver License Standards; Non-military Amphibious Landing Craft
Is a person from Puerto Rico required to surrender his or her driver’s license in order to obtain a non-domiciled CDL? FMCSA-CDL-383.21-Q1 Commercial Driver License Standards; Puerto Rico CDL
Does a receipt to drive issued pursuant to the administrative license revocation (ALR) procedure authorize the continued operation of a CMV when the license surrendered is a CDL? FMCSA-CDL-383.51-Alc-Q02 Commercial Driver License Standards; ALR Procedure
Are employees of a governmental agency who drive emergency response vehicles that transport HM in quantities requiring placarding subject to the CDL regulations? FMCSA-CDL-383.93-Q01 Commercial Driver License Standards; Emergency Vehicle HM Requirements