T-12, r. 17 - Regulation respecting road vehicles used for the transportation of school children

Full text
23.1. School buses weighing more than 4,536 kg shall be equipped, on each side, with at least one emergency window exit that opens outwards when sufficient pressure is applied. Where a bus is equipped with only one window on each side, those windows shall be located so as to provide egress from the centre of the side walls of the passenger compartment.
O.C. 32-2001, s. 3.