65 ILCS 5/8-13-15
The State of Illinois pledges to and agrees with each transferring unit and issuing entity that the State will not limit or alter the rights and powers vested in the State entities by this Article with respect to the disposition of transferred receipts so as to impair the terms of any contract, including any assignment agreement, made by the transferring unit with the issuing entity or any contract executed by the issuing entity in connection with the issuance of obligations by the issuing entity for the benefit of the transferring unit until all requirements with respect to the deposit by such State entity of transferred receipts for the benefit of such issuing entity have been fully met and discharged. In addition, the State pledges to and agrees with each transferring unit and each issuing entity that the State will not limit or alter the basis on which the transferring unit's share or percentage of transferred receipts is derived, or the use of such funds, so as to impair the terms of any such contract. Each transferring unit and issuing entity is authorized to include these pledges and agreements of the State in any contract executed and delivered as described in this Article. In no way shall the pledge and agreements of the State be interpreted to construe the State as a guarantor of any debt or obligation subject to an assignment agreement under this Division.
65 ILCS 5/8-13-15