Section 5 ILCS 100/10-30 - Disqualification of administrative law judge(a) The agency head, one or more members of the agency head, or any other person meeting the qualifications set forth by rule under Section 10-20 may be the administrative law judge.(b) The agency shall provide by rule for disqualification of an administrative law judge for bias or conflict of interest. An adverse ruling, in and of itself, shall not constitute bias or conflict of interest.