International vehicle registration code registration plate. When the distinguishing sign is incorporated in the registration plate, it must also appear on the front registration plate of the vehicle. The requirement to display a separate distinguishing sign is not necessary within the European Economic Area, for vehicles with license plates in the common EU format which satisfy the requirements of the Vienna Convention, and so are also valid in non-EU countries signatory to the convention. Separate signs are also not needed for Canada, Mexico and the United States, where the province, state or district of registration is usually embossed or surface-printed on the vehicle registration
International Registration Plan International Registration Plan The International Registration Plan (IRP) is a registration reciprocity agreement between the contiguous United States and Canadian provinces, which provides apportioned payments of registration fees, based on the total distance operated in participating jurisdictions, to them. IRP's fundamental principle is to promote and encourage the fullest possible use of the highway system. The benefit of this plan is that a carrier may be registered in only his/her home state, yet legally engage in interstate commerce. Each carrier vehicle only needs one specially marked "Apportioned", "APP", or "PRP" license plate, and a cab card which lists each jurisdiction