Complex sentence: Only official car dealer/car repair companys could use the "U" plates, usulay they use this plate only for a few days on one vehicle this plate can be used on Trucks and cars no mather what enginepower or polution rat the vehicle has.
Split into simpler sentences: Only official car dealer/car repair companys could use the "U" plates. This "U" plate can be used on trucks and cars no mather what enginepower or polution rat the vehicle has.