20 ILCS 3955/15
A regional authority which receives a complaint alleging that the rights of an eligible person have been violated in the region in which the authority sits, shall conduct an investigation unless it determines that the complaint is frivolous or beyond the scope of its authority or competence, or unless the Director finds that a conflict of interest exists and directs another regional authority to conduct the investigation. The authority shall inform the complainant whether it will conduct an investigation, and if not, the reason therefor. The authority may advise a complainant as to other remedies which may be available. Reassignments of investigations for conflicts of interest and refusals to investigate shall be reviewed and approved by the Director and the Director may seek direction from the Commission.
20 ILCS 3955/15