 The conference's demise was set in motion by the Illinois High School Association voting to establish a district football format in 2021, meaning Mount Carmel would not be able to schedule all of the other conference members in that sport.The conference responded by voting to remove the school in 2020, while the school voted to leave before the 2019-20 school year.This set off a chain reaction, as Jasper and Vincennes Lincoln were accepted to return to the SIAC for 2020, and a week later, the PAC voted to accept the remaining four schools, including two former members, Boonville and Mount Vernon, effectively ending the conference.