Although the Regional Transportation Authority (RTA) achieved unification of Chicago's commuter railroads during the 1970's, the individual railroads continued to actually operate the commuter services, and issue the tickets. And as the 1970's progressed, the railroads began including the RTA logo on their tickets. And the railroads' many different "station to station" fares were replaced by uniform "zone" fares, with zone letters identified on the tickets. Zone A begins downtown and extends 5 miles out, with each subsequent lettered zone 5 miles long.

In 1966, the Illinois Central adopted a system of gates at the stations, activated by tickets with magnetic backings. Shown are tickets issued at stations, along with cash fare receipts issued by conductors for fares paid on the train. Illinois Central and Gulf Mobile & Ohio merged in 1972, forming the Illinois Central Gulf Railroad. Prior to the merger, IC briefly attempted to market the commuter service as "IC Transit". Tickets issued by agents at stations had the date rubber stamped on them. During the 1970's, vending machines replaced the agents at all stations outside downtown Chicago. Two vending machine tickets are shown, with data printed at the bottom, including zones of validity. When fares were collected by conductors, cash fare receipts were issued, along with the "FOR EXIT USE ONLY" magnetic ticket form.