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… TOP , GBO and other instructions as may be required. 302. Clearance Required (a) Except within cautionary limits, a train or transfer must be authorized by a clearance to foul or enter a track where OCS rules are applicable. (b) A clearance will be sent direct to the crew of the train or …
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… 351. Application On portions of the railway so specified by special instructions, the use of the main track will be governed by the Special Control System. 352. Supervision Movements and track … who will issue instructions as may be required. 353. SCS Special Instructions Special instructions necessary to govern …
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