Illinois Regulations § 26 IAC 125.185 Official Notice

Notice may be taken of matters of which the Circuit Courts of this State may take judicial notice. In addition, notice may be taken of generally recognized technical or scientific facts within the agency's specialized knowledge. Parties shall be notified either before or during the hearing, or by reference in preliminary reports or otherwise, of the material noticed, including any staff memoranda or data, and they shall be afforded an opportunity to contest the material so noticed. The agency's experience, technical competence and specialized knowledge may be utilized in the evaluation of the evidence.