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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
Question 1: Is §392.10(a)(4) applicable to drivers operating cargo tank vehicles that were used to transport hazardous materials for which placarding or marking was required, but are no longer required because the cargo tank has been emptied, or the quant FMCSA-DRV-392.10-Q001 Railroad crossings
If a driver is required repeatedly to respond to satellite or similar communications received during a 10-hour off-duty period (8-hour off-duty period for passenger transportation), does this activity affect a driver’s duty status? FMCSA-HOS-395.2-Q31 Hours of Service Definitions
(FMCSA-D&A-CLEAR-382.711-FAQ004) FMCSA-D&A-CLEAR-382.711-FAQ004 Guidance on Staffing Agency registration in the Clearinghouse
Which drivers are to be included in a alcohol and controlled substances testing program under the Federal Motor Carrier Safety Administration’s (FMCSA) rule? FMCSA-D&A-382.103-Q07 Applicability of drug and alcohol testing requirements to drivers operating CMVs in commerce
Should a medical review officer (MRO) report a negative-dilute test result in the Clearinghouse? FMCSA-D&A-CLEAR-382.705-FAQ015 Guidance Clarifying that a negative-dilute RTD result should be reported as “negative”
Can a substance abuse professional (SAP) modify or delete return-to-duty (RTD) information he/she has reported? FMCSA-D&A-CLEAR-382-FAQ031 Guidance on SAP Information Modification
If I registered as an employer without a Portal account, can I now link my Portal account with my Clearinghouse account? FMCSA-D&A-CLEAR-382-FAQ023 Guidance on Linking Portal Account to Clearinghouse Account
How are bulk queries processed? FMCSA-D&A-CLEAR-382-FAQ006 Guidance on Bulk Query Processing
Can an employer, consortium/third-party administrator (C/TPA), or medical review officer (MRO) modify or delete violation information they have reported? FMCSA-D&A-CLEAR-382.705-FAQ006 Clearinghouse FAQ
How can I track the progress of my bulk queries? FMCSA-D&A-CLEAR-382-FAQ007 Guidance on Bulk Query Tracking