505 ILCS 40/21
A proposed amendment to an existing corn marketing program may be requested by petition to the Director by 5% of the affected producers from each respective district or by a 2/3 majority vote of the corn marketing board. If any amendment to an existing corn marketing program is proposed, the Director shall hold a public hearing to consider such amendment. After the close of the public hearing the Director and the corn marketing board shall send copies of their findings to all parties of record appearing at the hearing. If such proposed amendment is approved by the corn marketing board a referendum may be held thereon in accordance with Section 9 and the same voting requirements for adoption of the corn marketing program as set forth in Section 7. When any such amendment is approved by referendum, the Department shall file the amendment with the Secretary of State as provided in Section 5-65 of the Illinois Administrative Procedure Act.
The Director, upon recommendation of the corn marketing board, shall establish procedures necessary in the development and adoption of such proposed amendment to an existing corn marketing program. Such procedures shall be included in the rules of the Department required by Section 5-15 of the Illinois Administrative Procedure Act.
505 ILCS 40/21