70 ILCS 5/15
The Board of Commissioners of an Authority, from time to time, may execute and deliver bonds, notes or certificates of indebtedness payable from revenues, in such form as may be approved by the Board. Notwithstanding the provisions of any other law to the contrary, including particularly but without limitation the Bond Authorization Act, such bonds, notes or certificates of indebtedness: may bear interest at any rate or rates (which may be established by reference to an index or formula which may be implemented or administered by persons appointed or retained therefor by the Authority), may bear such date or dates, may be payable at such time or times and at such place or places, may mature at any time not later than 30 years from the date of issuance, may be sold at public or private sale at such time or times and at such price or prices, may be secured by such pledges, reserves, guarantees or insurance, may be executed in such manner, may be subject to redemption prior to maturity, all upon such terms and conditions as are provided by the Authority in the ordinance authorizing the issuance of any bonds, notes or certificates of indebtedness. The bonds, notes, or certificates of indebtedness shall be payable solely from revenue derived from the operation, management or use of any public airport, or airport facility or facilities in accordance with the rules, regulations, contracts, leases or subleases of the Authority. Such revenue obligations shall not be payable or paid out of funds derived by the Authority from taxation or by funds derived from the sale of any property belonging to said Authority. Any bond, note or certificate of indebtedness issued under this section shall recite in the body thereof that the same is payable solely from the revenue pledged to pay the same, and shall state on its face that the same is not payable from taxation and that it is not a debt within the meaning of any statutory or constitutional limitation. The bonds, notes, or certificates of indebtedness may be issued in part under the authority of, and may be additionally secured as provided in, the Local Government Debt Reform Act.
70 ILCS 5/15