The Department may establish such subdivisions of the Department as shall be desirable and assign to the various subdivisions the responsibilities and duties placed upon the Department by the Laws of the State of Illinois.
The Department shall adopt, as necessary, rules for the execution of its powers. The provisions of the Illinois Administrative Procedure Act are hereby expressly adopted and shall apply to all administrative rules and procedures of the Department under this Act, except that Section 5-35 of the Illinois Administrative Procedure Act relating to procedures for rulemaking does not apply to the adoption of any rule required by federal law in connection with which the Department is precluded by law from exercising any discretion.
325 ILCS 3/1-30