CHICAGO (AP) — An Illinois appeals court has blocked efforts of a Chicago police union to keep disciplinary files dating back decades from public view.

The Fraternal Order of Police sued to block the records release after a March 2014 appellate court ruling that documents dating from 1967 should be made public.

An Illinois Appellate Court panel confirmed Friday the records must be released under Freedom of Information Act laws. The court also ruled a clause in the union’s contract with Chicago requiring the destruction of disciplinary records after four years was “legally unenforceable.”

Several news outlets made FOIA requests seeking the names of officers who had received at least one complaint, the final finding of any investigation and any disciplinary action.

FOP President Dean Angelo Sr. declined comment, saying he hadn’t read the ruling.