The station shared time on the frequency with WCBD until the November 11, 1928 implementation of the Federal Radio Commission's General Order 40, at which point WLS began sharing time as a "clear channel" station with WENR.Hearings Before the United States Senate Committee on Interstate Commerce. Commission on Communications. United States Government Print Office. May 8, 1929. p. 126-129. Retrieved August 24, 2018.
the station shared time on the frequency with wcbd until the november 11 1928 implementation of the federal radio commission's general order 40 at which point wls began sharing time as a "clear channel" station with wenrhearings before the united states senate committee on interstate commerce commission on communications united states government print office may 8 1929 p 126-129 retrieved august 24 2018