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

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32. Interlocking signal indications govern the use of the routes and authorize the movement of equipment within a limit, the interlocking limit, which is delimited by opposed interlocking signals located at the ends of the limit.
A locomotive engineer may not enter interlocking limits without having in his possession the safety rules governing the movement within those limits; he must abide by those rules.
O.C. 1401-2000, s. 32.