Registration under the International Registration Plan is not mandatory. It is a program for licensing commercial trucks and buses traveling in Louisiana and at least one other jurisdiction, if:
1.The commercial vehicle is used for the transportation of persons for hire or designed, used or maintained primarily for the transportation of property
AND the vehicle is a power unit having:
2. two axles and a gross vehicle weight in excess of 26,000 pounds, or
3. three or more axles, regardless of weight, or
4. a gross vehicle weight greater than 26,000 pounds in combination with a trailer
If a truck meets criteria number one and one of the criteria numbered two through four, and travels interstate in a commercial capacity, either a trip permit or an apportioned plate should be obtained.
If a vehicle has two axles and weighs less than 26,000 pounds, but engages in interstate travel, an apportioned plate may be advisable. A good rule of thumb in this situation is: "If you make more than one stop in a state while conducting business, then you should have a trip permit or be apportioned.