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  • § 399.201
    Purpose and scope.
  • § 399.203
  • § 399.205
  • § 399.207
    Truck and truck-tractor access requirements.
  • § 399.209
    Test procedures.
  • § 399.211
  • Appendix B to Subchapter B of Chapter III—Special Agents
    Special Agents
  • Appendix F to Subchapter B of Chapter III—Commercial Zones
    Commercial Zones
  • Appendix G to Subchapter B of Chapter III—Minimum Periodic Inspection Standards
    Minimum Periodic Inspection Standards

Part 399

§ 399.201: Purpose and scope.

This subpart prescribes step, handhold, and deck requirements on commercial motor vehicles. These requirements are intended to enhance the safety of motor carrier employees.


Although we make every effort to assure that the information we provide is complete and accurate, it is not intended to take the place of published agency regulations. Regulations issued by the U.S. Department of Transportation and its Operating Administrations 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 at

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