R.I. Gen. Laws § 42-133-14: Agreement by the state.

The state does hereby pledge to and agree with the holders of any bonds issued under this chapter that the state will not limit or alter the rights vested in the corporation to fulfill the terms of any agreements made with the holders, or otherwise take any action that materially and adversely affects the rights of the holders, until the bonds, 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 holders, are fully met and discharged. The corporation is authorized to include this pledge and agreement of the state in any agreement with the holders of the bonds.