Custom chassis vehicle
Custom chassis vehicle means a vocational vehicle that is a motor home, school bus, refuse hauler, concrete mixer, emergency vehicle, mixed-use vehicle or other buses that are not school buses or motor coaches. These vehicle types are defined in 49 CFR 523.3. A mixed-use vehicle is one that meets at least one of the criteria specified in 40 CFR 1037.631(1) or at least one of the criteria in 40 CFR 1037.631(a)(2), but not both.