What is not permitted for Class 1 licence holders to operate without an appropriate endorsement?

Answer: C — School buses

Class 1 license holders are permitted to operate motorcycles, vehicles with air brakes, and semi-trailers, as long as they have the appropriate endorsement for these types of vehicles. However, they are not permitted to operate school buses without the appropriate endorsement. This is because school buses require specialized training and knowledge to safely operate due to the transportation of passengers, especially children. Therefore, if a Class 1 license holder does not have the appropriate endorsement for school buses, they are not allowed to operate them.