Tractor means a vehicle meeting the definition of tractor in 40 CFR 1037.801, but not classified as a vocational tractor under 40 CFR 1037.630, or relating to such a vehicle.
40 CFR § 1036.801
The following definitions apply to this part. The definitions apply to all subparts unless we note otherwise. All undefined terms have the meaning the Act gives to them. The definitions follow: