• A “qualified” or “apportionable” vehicle under the International Registration Plan (IRP) is any vehicle used or intended for use in two or more member jurisdictions and meeting certain other criteria.
• Trucks and truck tractors, and a combination of vehicles having a gross vehicle weight of 26,000 pounds or less may be proportionally registered at the option of the registrant.
• Some states may require vehicles at 26,000 pounds or less to have trip permits before operating interstate or intrastate within a state.

A “qualified” or “apportionable” vehicle under the International Registration Plan (IRP) is any vehicle (except recreational vehicles, vehicles displaying restricted plates, city pick-up delivery vehicles, and government-owned vehicles) used or intended for use in two or more member jurisdictions that allocate or proportionally register vehicles and is used for the transportation of persons for hire, or designed, used, or maintained primarily for the transportation of property and:

1. Is a power unit having two axles and a gross vehicle weight or registered gross vehicle weight in excess of 26,000 pounds or 11,793.401 kilograms; or
2. Is a power unit having three or more axles, regardless of weight; or
3. Is used in combination, when the weight of such combination exceeds 26,000 pounds or 11,793.401 kilograms gross vehicle weight.

Trucks and truck tractors, and a combination of vehicles having a gross vehicle weight of 26,000 pounds or 11,793.401 kilograms or less may be proportionally registered at the option of the registrant.

Carriers operating vehicles 26,000 pounds or 11,793.401 kilograms or less may apportion under the IRP if they wish, but do not have to do so. Some states allow such vehicles to travel interstate or intrastate, but some do not. Some states may require vehicles at 26,000 pounds or less to have trip permits before operating interstate or intrastate within a state.

Carriers should verify the requirements of the jurisdiction before entering the jurisdiction.