R.I. Gen. Laws § 45-38.1-21: Agreement of the state.

The state pledges to and agrees with the holders of any bonds or notes issued under this chapter, and with those parties who may enter into contracts with the corporation pursuant to the provisions of this chapter, that the state will not limit or alter the rights vested in the corporation until any obligations under contracts, together with the interest, are fully met and discharged and the contracts are fully performed on the part of the corporation, provided, that nothing contained in this chapter precludes the limitation or alteration if and when adequate provision is be made by law for the protection of the holders of the bonds of the corporation or those entering into the contracts with the corporation. The corporation is authorized to include this pledge and undertaking for the state in the bonds, notes, or contracts.