In this chapter, the following definitions apply:
(1) Federal government.— The term “Federal Government” includes the government of the District of Columbia.
(2) Motor vehicle.— The term “motor vehicle” means a vehicle, self-propelled or drawn by mechanical power, designed for use on the highways principally for the transportation of passengers, except a vehicle designed or used for military field training, combat, or tactical purposes.
(Pub. L. 107–217, Aug. 21, 2002, 116 Stat. 1279.)