Ill. Admin. Code tit. 2, § 1925.470
A binding opinion issued by the Attorney General shall be considered a final decision of an administrative agency, for purposes of administrative review under the Administrative Review Law [735 ILCS 5/Art. III]. An action for administrative review of a binding opinion of the Attorney General shall be commenced in Cook or Sangamon County. An advisory opinion issued to the Agency shall not be considered a final decision of the Attorney General for purposes of FOIA. (Section 11.5 of FOIA)
(Source: Amended at 49 Ill. Reg. 15977, effective December 2, 2025)