S-3.3, r. 2 - Regulation respecting rail safety

Full text
52. The supervisor must remove from service, until it is repaired, a car that shows one of the following defects:
(1)  the centre sill is broken or, in the case of a tank car, the stub sill has a crack in the parent metal;
(2)  a cross bearer or a body bolster is broken;
(3)  the centre plate is broken;
(4)  at least 2 door stops are missing or broken;
(5)  safety hangers on sliding or plug doors are missing or damaged; or
(6)  sliding or plug doors are off the rails.
Also, a flat car with lading restraining devices worn or damaged to the extent that these devices will not restrain the load must be removed from service. Likewise, a car that has an object on its floor that is not properly secured and could fall off must be removed from service.
O.C. 1401-2000, s. 52.