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

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14. At the beginning of their shift, the members of the locomotive crew, when equipped with radios, must carry out an intra-crew test of such radios.
When not in use, radios must be set to the standby channel and at a volume that ensures continuous monitoring.
The requirements provided for in this section do not apply when only one portable locomotive control device is used.
O.C. 1401-2000, s. 14.