Tenn. Code Ann. § 4-31-111

The state does hereby covenant and agree with the holders of any bonds or notes issued under this chapter, that the state will not limit or alter the rights hereby vested in the authority to fulfill the terms of any agreements made with the holders thereof, or in any way impair the rights and remedies of such holders until such bonds or notes, together with the interest thereon, with interest on any unpaid installments of interest, and all costs and expenses in connection with any action or proceeding by or on behalf of such holders, are fully met and discharged.