(1) Each railroad policeman shall, while on duty, wear a metal badge or shield, with the words "Railroad Police" and the name or initials of the railroad engraved thereon. When acting as a detective in the service of the railroad, he may wear the badge or shield concealed.
(2) Every railroad company shall require a uniform hat or cap and distinguishing badges to be worn by all its employees, other than engineers and firemen, whose duties relate immediately to the transportation of passengers.