49 CFR 523.8 - Heavy-duty vocational vehicle.
Heavy-duty vocational vehicles are vehicles with a gross vehicle weight rating (GVWR) above 8,500 pounds excluding:
(a) Heavy-duty pickup trucks and vans defined in § 523.7;
(b) Medium duty passenger vehicles; and
(c) Truck tractors, except vocational tractors, with a GVWR above 26,000 pounds;