| Group 0 | Mopeds. |
| Group 1 | Motorcycles (which includes mopeds and motor scooters) with a cylinder capacity not exceeding 125 cubic centimetres. |
| Group 1A | Motorcycles with a cylinder capacity exceeding 125 cubic centimetres and includes vehicles in Group 1. |
| Group 2 | Group 0, motor cars, taxis and trucks not exceeding 8,500 lbs; omnibuses not exceeding a seating capacity of fifteen persons in addition to the driver, towing a trailer not exceeding 2,000 lbs except Groups 1 and 1A. |
| Group 3 | Vehicles in Groups 0 and 2, trucks not exceeding 33,000 lbs and omnibuses not exceeding a seating capacity of forty persons in addition to the driver; towing a trailer not exceeding 10,000 lbs except Groups 1 and 1A. |
| Group 4 | All vehicles except Group 1 and 1A. |
