(55 ILCS 5/6-9003) (from Ch. 34, par. 6-9003)
    Sec. 6-9003. Sale or exchange of bonds. Such refunding bonds may be exchanged par for par for principal, interest or both, described in the authorizing resolution, or may be sold at not less than their par value, and the proceeds of the sale shall be used only for the purpose of paying such principal, interest or both.
(Source: P.A. 86-962.)