49 USC 31101 - Definitions

In this subchapter
(1) commercial motor vehicle means (except in section 31106) a self-propelled or towed vehicle used on the highways in commerce principally to transport passengers or cargo, if the vehicle
(A) has a gross vehicle weight rating or gross vehicle weight of at least 10,001 pounds, whichever is greater;
(B) is designed to transport more than 10 passengers including the driver; or
(C) is used in transporting material found by the Secretary of Transportation to be hazardous under section 5103 of this title and transported in a quantity requiring placarding under regulations prescribed by the Secretary under section 5103.

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(2) employee means a driver of a commercial motor vehicle (including an independent contractor when personally operating a commercial motor vehicle), a mechanic, a freight handler, or an individual not an employer, who
(A) directly affects commercial motor vehicle safety in the course of employment by a commercial motor carrier; and
(B) is not an employee of the United States Government, a State, or a political subdivision of a State acting in the course of employment.
(3) employer
(A) means a person engaged in a business affecting commerce that owns or leases a commercial motor vehicle in connection with that business, or assigns an employee to operate the vehicle in commerce; but
(B) does not include the Government, a State, or a political subdivision of a State.
(4) State means a State of the United States, the District of Columbia, Puerto Rico, the Virgin Islands, American Samoa, Guam, and the Northern Mariana Islands.