Regulations issued by FMCSA are published in the Federal Register and compiled in the U.S. Code of Federal Regulations (CFR). Copies of appropriate volumes of the CFR in book format may be purchased from the Superintendent of Documents, U.S. Government Printing Office, or examined at many libraries. The CFR may also be viewed online. 

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• 49 CFR Parts 300-399 - FMCSA Regulations
• 49 CFR Part 40 – Procedures for Transportation Workplace Drug and Alcohol Testing Programs
• 49 CFR Parts 100-180 - Hazardous Materials Regulations
• 49 CFR Part 571 - Federal Motor Vehicle Safety Standards