All bonds issued under this Article shall have a lien upon the revenues and receipts derived from the development project for which the bonds have been issued, and the corporate authorities may provide in the ordinance or ordinances authorizing such bonds for the issuance of additional bonds to be equally and ratably secured by a lien upon such income or revenues or may provide that the lien upon such income and revenues is subordinate. (Ord. 0-81-26, 4-6-81)