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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
May the Form MCS-90B required by part 387 for proof of minimum financial responsibility be modified? FMCSA-INS-387.39-Q002 Modification of Form MCS-90B
May a motor carrier be exempt from driver qualification requirements by hiring a driver leasing company or temporary help service? FMCSA-DQ-391.11-Q004 General qualifications of drivers
§391.11 General qualifications of drivers. FMCSA-DQ-391.11-Q006 General driver qualifications
What types of documents must a motor carrier retain to support its accident register and be in compliance with §390.15(b)? FMCSA-RG-390.15-Q003 Documents required for accident register
Does the FMCSA define for-hire transportation of passengers the same as the former ICC did? FMCSA-RG-390.5T-Q010 For-hire transportation of passengers
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
Will foreign drug testing laboratories need to be certified by the National Institute on Drug Abuse (NIDA)? Will they need to be certified by the Department of Health and Human Services (DHHS)? FMCSA-D&A-382.105-Q03 Applicability of Section § 382.105
In § 399.207(b)(4), Illustration III, what does the unshaded area within the disc suggest? FMCSA-RG-399.207-FAQ03 Access requirements for truck and truck-tractor cabs
Why does the Federal Motor Carrier Safety Administration (FMCSA) allow post-accident tests done by Federal, State or local law enforcement agencies to substitute for a §382.303 test even though the FMCSA does not allow a Federal, State or local law enforc FMCSA-D&A-382.303-Q01 Post accident testing conducted by Federal, State or local law enforcement agencies
May a truck driver use the adverse driving conditions exception if he/she has accumulated driving time and on-duty (not driving) time, that would put the driver over 14 hours or over 70 hours in 8 consecutive days? FMCSA-HOS-395.1-Q03 Hours of Service Exceptions