We went looking for information about the licensing of Class 2 and Class 4 Drivers and found this interesting information on the Department of Public Safety website.
Department of Public Safety : New Brunswick Drivers Handbook
http://www.gnb.ca/0276/vehicle/english/handbk_e.asp
Licensing of Vehicles
http://www.gnb.ca/0276/vehicle/english/part1_e.pdf
It gives a thumbnail description of the qualifications required for Class 2 versus Class 4 drivers and even shows a picture of a bus for Class 2 drivers and a taxi for a Class 4 driver.
Ask yourself this: Would you want a coach, teacher, parent or other volunteer with a Class 4 license driving your children to an out of town sports event in one of these big buses at Bathurst High School or anywhere else in the province?