REVISIONS OF MARCH 1, 1964

4163-A. When an engine of a class that must not be operated between specified points unless adjacent tracks are clear (as indicated on the time-table), is to move over such portions of the railroad, the master mechanic must advise the train dispatcher the class of engine and the restriction involved. If the restriction applies also on a region over which inter-regional crews operate, the train dispatcher of the originating region, after having been so notified, will arrange to notify the train dispatcher of the connecting regions.