---
kind: "section"
citation: "49 C.F.R. § 381.110"
title: "49"
number: "381.110"
heading: "What definitions are applicable to this part?"
url: "https://uscodex.org/cfr/49/381.110"
---

# §381.110. What definitions are applicable to this part?


Commercial motor vehicle means any motor vehicle that meets the definition of “commercial motor vehicle” found at [49 CFR 382.107](/cfr/49/382.107.md) concerning controlled substances and alcohol use and testing, [49 CFR 383.5](/cfr/49/383.5.md) concerning commercial driver's license standards, or [49 CFR 390.5](/cfr/49/390.5.md) concerning parts [390](/cfr/49/part390.md) through [399](/cfr/49/part399.md) of the FMCSRs.

Federal Motor Carrier Safety Administrator (the Administrator) means the chief executive of the Federal Motor Carrier Safety Administration, an agency within the Department of Transportation.

FMCSRs means Federal Motor Carrier Safety Regulations (49 CFR parts [380](/cfr/49/part380.md), [382](/cfr/49/part382.md), 383, and 384; 49 CFR [390.19](/cfr/49/390.19.md) and [390.21](/cfr/49/390.21.md); and 49 CFR parts [391](/cfr/49/part391.md) through [393](/cfr/49/part393.md), 395, 396, and 399).

You means an individual or motor carrier or other entity that is, or will be, responsible for the operation of a CMV(s). The term includes a motor carrier's agents, officers and representatives as well as employees responsible for hiring, supervising, training, assigning, or dispatching of drivers and employees concerned with the installation, inspection, and maintenance of motor vehicle equipment and/or accessories. You also includes any interested party who would like to suggest or recommend that the FMCSA initiate a pilot program.


## Notes

### Amendments

[63 FR 67608, Dec. 8, 1998, as amended at 80 FR 59072, Oct. 1, 2015; 86 FR 35639, July 7, 2021]

### Authority

Authority: 49 U.S.C. 31136(e), 31315; and 49 CFR 1.87.

### Source

Source: 63 FR 67608, Dec. 8, 1998, unless otherwise noted.

### Amendments

[63 FR 67608, Dec. 8, 1998, as amended at 80 FR 59072, Oct. 1, 2015; 86 FR 35639, July 7, 2021]