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4.1.1 Applicability (390.3T)

See all general applicability guidelines in 49 CFR 390.3T, and exceptions or exemptions related to specific Parts of the Code of Federal Regulations (CFR) at the beginning of each chapter of this planner.

Understanding how the U.S. DOT defines commercial motor vehicles and other terminology is essential to understanding which regulations apply to your business. Please view definition in the glossary; pay specific attention to the definition of a CMV.

  • Motor carriers must be knowledgeable and comply with all FMCSRs and HMRs relevant to their operation.
  • Employers must teach employees about relevant FMCSRs, and employees must comply.
  • Motor vehicle equipment and accessories must be maintained in compliance with the performance and design criteria of relevant FMCSRs.

Applicability: Hazmat Carriers in Intrastate Commerce (390.3T(g))

FMCSRs that apply to hazmat carriers engaged in intrastate commerce can be found at 49 CFR 390.3T(g), and in the hazmat chapter of this planner.

Applicability: Intermodal Equipment Providers (390.3T(h)

FMCSRs that apply to intermodal equipment providers can be found at 49 CFR 390.3T(h).

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