Apportioned vehicles possess two axles and a registered gross vehicle weight in excess of 26,000 pounds. A power unit with three or more axles, irrespective of weight, is also an apportioned vehicle. Buses used to transport chartered parties may be proportionally registered, though apportioned registration is not required.
A cab card must accompany each apportioned license plate. This card indicates exactly in which states the vehicle is authorized to travel without a trip permit. The non-transferable apportioned cab card must be kept in the vehicle at all times and must be surrendered with the plates should the vehicle be deleted from a fleet.
Base jurisdiction is established by the place of business and location of fleet records. Interstate carries file applications within their base jurisdiction.
Each jurisdiction follows a specific registration schedule. Fees are generally based on maximum weight, unladen weight, percent of mileage traveled per jurisdiction, vehicle identification information, value and age.