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

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38. A locomotive crew member or the user of the portable locomotive control device must keep the derails in the derailing position at places where equipment that has been left standing on the track could move and cause an accident.
Each derail must be visible and set to derail equipment on the safest side.
Derail fastening devices must keep derails operative at all times. Derails must be locked when they are located at a public place without surveillance.
O.C. 1401-2000, s. 38.