Federal Motor Carrier Safety Administration regulations can be found in the Code of Federal Regulations, part 49, sections 300-399.

You can access the official version of current FMCSA regulations on our regulations web page. Look under "Related Links" for other regulations that may affect motor carrier operations, such as drug and alcohol regulations (section 40) and hazardous materials program procedures (section 107).

An up-to-date, unofficial version of the regulations can be found on the eCFR site.

To access previous versions of the Code of Federal Regulations (including 49 CFR 300-399) by year, back to 1996, go to the US Government Printing Office (GPO) FDsys site and select the year, then the part/section you want. If you need older versions, please contact your local library, which may have access to earlier versions of the CFR in print or online.

Proposed and final rules amending regulations (and other regulatory documents) are published daily in the Federal Register, also on the GPO website.

Recent regulatory documents published by FMCSA can be found on our "Rulemaking Documents" page.

Regulatory documents (including proposed and final rules and notices) for the FMCSA and other government agencies can be found on the Regulations.gov website. You can submit comments on proposed and final rules at this site.