The Illinois Administrative Procedure Act is hereby expressly adopted and shall apply to all administrative rules and procedures of the Department of Revenue under this Act, except that: (1) paragraph (b) of Section 4 of the Illinois Administrative Procedure Act does not apply to final orders, decisions and opinions of the Department of Revenue; (2) subparagraph (a)(2) of Section 4 of the Illinois Administrative Procedure Act does not apply to forms established by the Department of Revenue for use under this Act; and (3) the provisions of Section 13 of the Illinois Administrative Procedure Act regarding proposals for decision are excluded and not applicable to the Department of Revenue under this Act.
415 ILCS 5/55.14