SUPERIORITY OF TRAINS
71. A train is superior to another train by right, class, or direction.
Right is conferred by train order; class and direction by time table.
Right is superior to class or direction.
71A. (Single Track) Direction is superior as between trains of the same class.
72 Trains of the first class are superior to those of the second, trains of the second class are superior to those of the third, and so on.
72A. (Single Track) Trains in the direction specified by time table are superior to trains of the same class in the opposite direction.
73. Extra trains are inferior to regular trains.
NOTE: Work extras have no specified direction.