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

Full text
33. A switch must be secured with a lock or a hook after operating its switch points. The lock or the hook must be installed so that the switch may not be operated while the lock or the hook is still in place.
If the switch is equipped with a target, the target must be green when it is set for the normal route and yellow when set for the other route.
O.C. 1401-2000, s. 33.