20 ILCS 3955/17

(Text of Section before amendment by P.A. 104-465)

In the course of an investigation, a regional authority may enter and inspect the premises of a service provider or State agency and question privately any person therein within reasonable limits and in a reasonable manner. Whenever possible, prior notice shall be given the parties regarding the nature, location, and persons involved in a particular investigation.

(Text of Section after amendment by P.A. 104-465)

In the course of an investigation, a regional board may enter and inspect the premises of a service provider or State agency and question privately any person therein within reasonable limits and in a reasonable manner. Whenever possible, prior notice shall be given the parties regarding the nature, location, and persons involved in a particular investigation.