5 ILCS 140/11.5

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 a public body shall not be considered a final decision of the Attorney General for purposes of this Section.