Each province has separate endorsements that can be added to their license for things such as school buses or air brakes. As an example, in Ontario, one must have a Z-endorsement to drive a truck with air brakes while in New Brunswick it is an F-endorsement. To drive a school bus in Saskatchewan requires you to have an S-endorsement.
For drivers looking to drive vehicles such as school buses, transporting people with special disabilities, and larger capacity buses an unrestricted designation is required.
In Ontario, the license requires a class B, C, E or F. A Class B License allows drivers to operate a school bus with more than 24 passengers. A Class E license allows a driver to use a school bus to transport up to 24 passengers.
With a Class C license, a driver can drive a non-school bus with seating for more than 24 passengers. It also allows the driver to operate a vehicle covered by D, F, and G licenses.
A Class F license allows the driver to operate a regular, non-school bus with seating for up to 24 people, including an ambulance.