70 ILCS 1870/15
All such bonds and certificates shall be payable solely from the revenues or income to be derived from terminals, terminal facilities or port and transportation facilities or any part thereof, may bear such date or dates, may mature at such time or times not exceeding 40 years from their respective dates, may bear interest at such rate or rates payable semiannually, may be in such form, may carry such registration privileges, may be executed in such manner, may be payable at such place or places, may be made subject to redemption in such manner and upon such terms, with or without premium as is stated on the face thereof, may be authenticated in such manner and may contain such terms and covenants, all as are provided by ordinance of the Port District.
70 ILCS 1870/15