Expressway revenue bonds issued under the provisions of this Chapter shall not be deemed to be a debt of the state or a pledge of the faith and credit of the state, but such bonds shall be payable exclusively from the fund pledged for their payment or authorized herein.  All such bonds shall contain a statement on their face that the state is not obligated to pay the same or the interest thereon and that the faith and credit of the state is not pledged to the payment of the principal or interest of such bonds.  The issuance of expressway revenue bonds under the provisions of this Chapter shall not, directly or indirectly or contingently, obligate the state to levy or to pledge any form of taxation whatever therefor, or to make any appropriation for their payment.  State funds shall not be used, appropriated or expended to construct, reconstruct, maintain, service, repair, purchase or lease any toll road authorized hereunder or to pay the principal or interest of any revenue certificates or other evidences of indebtedness issued for any such purpose, and the legislature does herewith determine that any such use of state funds would violate the constitution of the state of Louisiana and all such bonds shall contain a statement on their face to this effect.  

Acts 1954, No. 232, §12.