7-15-4501. Authorization to issue bonds. The authority shall have power and is hereby authorized to issue, from time to time in its discretion, for any of its corporate purposes:

(1) bonds on which the principal and interest are payable:

(a) exclusively from the income and revenues of the housing project financed with the proceeds of such bonds or with such proceeds together with the proceeds of a grant from the federal government to aid in financing the construction thereof; or

(b) exclusively from the income and revenues of certain designated housing projects, whether or not they were financed in whole or in part with the proceeds of such bonds; provided, however, that the credit of the authority shall not be pledged to the payment of such bonds, but such bonds shall be payable only (and the bonds shall so state on their face) from the revenues of the designated housing project or projects and the funds received from the sale or disposal thereof and, if the authority so determines, shall be additionally secured by a trust indenture pledging such revenues or, in certain instances as hereinafter provided, by a mortgage of the property comprising such designated housing project or projects and the revenue therefrom;

(2) bonds for the payment of the principal and interest of which the credit of the authority is pledged and which may be additionally secured by a pledge of the revenues of the authority or any part thereof pursuant to a resolution or trust indenture of the authority or, in certain instances as hereinafter provided, may be additionally secured by a mortgage of the property and revenues of the authority or any part thereof.