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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: 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
What is a motor carrier or driver required to do if they use two electronic logging devices (ELDs) that are not interoperable during a 7-day period? FMCSA-ELD-395-Q078(2022-03-10) ELD Guidance
ELD Registration and Certification FAQs FMCSA-ELD-Registration-and-Certification-FAQs(2022-03-10) ELD Guidance
What electronic logging device (ELD)-recorded data may not be edited? FMCSA-ELD-395-Q027(2022-03-10) ELD Guidance
Under section of 49 CFR part 395, subpart B, Appendix A, the engine synchronization compliance monitoring requires the electronic logging device (ELD) to record an engine synchronization diagnostics event when it cannot acquire values for the ELD FMCSA-ELD-395-Q048(2022-03-10) ELD Guidance
ELD Functions FAQs FMCSA-ELD-Functions-FAQs(2022-03-10) ELD Guidance
Are Canada- and Mexico-domiciled motor carriers permitted to use automatic on-board recording devices (AOBRDS)? FMCSA-ELD-395-Q028(2022-03-10) ELD Guidance
If a driver forgets to indicate the start of Personal Conveyance (PC) or Yard Moves (YM), can they later edit that automatically generated driving event to PC (Off Duty) or YM (On Duty Not Driving)? FMCSA-ELD-395-Q081(2022-03-10) ELD Guidance
Are motor carriers that meet the agricultural exemption defined in 49 CFR 395.1(k) or the covered farm vehicle § 395.1(s) subject to the Electronic Logging Device (ELD) rule? FMCSA-ELD-395-Q031(2022-03-10) ELD Guidance
If the unidentified driving time is accepted by the driver, will the electronic logging device (ELD) still show the driving time as unidentified? FMCSA-ELD-395-Q051(2022-03-10) ELD Guidance
May motor carriers use third parties to ask driver’s licensing authorities for copies of the driving record of driver-applicants? FMCSA-DQ-391.23-Q002(2022-03-09) Driver investigations and inquiries