Amendments to Sections 57-10-401 through 57-10-445, enacted after July 1, 1993, shall not limit the rights vested in the corporation with respect to any agreements made with, or remedies available to, the holders of bonds issued under this article or Section 27-7-22.3 prior to the enactment of the amendments until the bonds, together with all interest thereon, and all costs and expenses in connection with any proceeding by or on behalf of the holders, are fully met and discharged.