RULES GOVERNING THE MOVEMENT OF TRAINS IN THE SAME DIRECTION BY SIGNAL INDICATION
251. On portions of the railway, and on designated tracks so specified in the time table, or by special instructions, trains will run with reference to other trains in the same direction by block signals whose indications will supersede superiority of trains, except that the movement of work extras will be governed by train orders.
252. The movement of trains will be supervised by the train dispatcher, who will issue orders as may be required.
253. The train dispatcher must be advised in advance of any known condition that will delay the train or prevent it from making usual speed.
254. A train must not enter on nor foul a main track, nor re-enter a main track after having cleared it except by signal indication or until permission has been received from the operator or train dispatcher.
255. When a signal or permission has been given to a train, it may proceed until receiving a signal or message to take the siding. Such instruction by message will, when practicable, be given at a preceding station.
256. Unless otherwise provided, trains displaying signals will continue to display them through the territory.
257. Special instructions as may be necessary to govern this method of operation may be issued. Except as affected by such instruction and Rules 251-256 inclusive, all Operating, ABS, and Interlocking Rules remain in force.