Indiana Code Title 8. Utilities and Transportation § 8-4-1-24

Sec. 24. Every conductor, baggagemaster, engineer, brakeman, or other servant of any such railroad corporation, employed on a passenger train or at stations for passengers, shall wear upon his hat or cap a badge, which shall indicate his office and the initialed letters of the style of the corporation by which he is employed.  No collector or conductor, without such badge, shall demand or be entitled to receive from any passenger any fare, toll or ticket, or exercise any of the powers of his office;  and no other of said officers or servants, without such badge, shall have any authority to meddle or interfere with any passenger or property.