Section  1620.460  Service

After filing the petition and complaint, the petitioner shall serve a file-stamped copy of both documents on all respondents and on each respondent's ultimate jurisdictional authority in the same manner as process is served under Part 2 (Process) of the Civil Practice Law of  the Code of Civil Procedure [735 ILCS 5/Art. II, Part 2].  [5 ILCS 430/20-50(d)] Petitioner shall file the proof of service with the Commission.