All bonds issued under this chapter have a lien upon the income and revenues derived from any revenue agreement between the Village and the user; and the Corporate Authorities of the Village may provide in the bond ordinance for the issuance of additional bonds to be equally and ratably secured by a lien upon such income and revenues or may provide that the lien upon such income and revenues for additional bonds is subordinated. (Ord. 85-O-27, 7-8-1985)