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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
49 CFR 390.3T General applicability Question 19 --Government Entities FMCSA-RG-390.3T-Q019 Parties not included in the governmental exemption
Part 390 § 390.23 Relief from regulations Question 3 FMCSA-RG-390.23-Q003 Required off-duty time after providing emergency relief
Part 390 § 390.3T General applicability Question 21 FMCSA-RG-390.3T-Q021 Extent of exception for transportation of personal property
Who is responsible for ensuring that medical certifications meet the requirements? FMCSA-MED-391.41-Q1 Driver Physical Qualification Standards
Do the physical qualification requirements of the FMCSRs infringe upon a person’s religious beliefs if such beliefs prohibit being examined by a licensed doctor of medicine or osteopathy? FMCSA-MED-391.41-Q2 Driver Physical Qualification Standards
May the medical examiner restrict a driver’s duties? FMCSA-MED-391.41-Q4 Driver Physical Qualification Standards
If an interstate driver tests positive for alcohol or controlled substances under part 382, must the driver be medically re-examined and obtain a new medical examiner’s certificate to drive again? FMCSA-MED-391.41-Q5 Driver Physical Qualification Standards
Is the use of coumadin, an anticoagulant, an automatic disqualification for drivers operating CMVs in interstate commerce? FMCSA-MED-391.41-Q6 Driver Physical Qualification Standards
May a motor carrier, for the purposes of §391.41, or a State driver licensing agency, for the purposes of §383.71, accept the results of a medical examination performed by a foreign medical examiner? FMCSA-MED-391.43-Q1 Medical Certification of Foreign Drivers
May a urine sample collected for purposes of performing a controlled substances and alcohol test be used to test for diabetes as part of a driver’s FMCSA-required physical examination? FMCSA-MED-391.43-Q2 Driver Physical Qualification Examination