S.D. Codified Laws § 5-12-53
The State of South Dakota pledges to and agrees with the holders of bonds issued, incurred, or created under §§ 5-12-48 to 5-12-59, inclusive, that the state will not limit or alter the rights and powers vested in the corporation and the authority by §§ 5-12-48 to 5-12-59, inclusive, so as to impair the terms of any contract made by the corporation or the authority with those holders or in any way impair the rights and remedies of those holders until such bonds, together with interest thereon, interest on any unpaid installments of interest, and all costs and expenses in connection with any action or proceedings by or on behalf of those holders are fully met or discharged. In addition, the state pledges to and agrees with the holders of bonds issued, incurred, or created under §§ 5-12-48 to 5-12-59, inclusive, that the state will not limit or alter the basis on which tobacco settlement revenues that have been sold pursuant to §§ 5-12-48 to 5-12-59, inclusive, are to be paid to the corporation or the authority so as to impair the terms of any such contract. The corporation and authority each may include these pledges and agreements of the state in any contract with the holders of bonds issued, incurred, or created under §§ 5-12-48 to 5-12-59, inclusive.
Neither the State of South Dakota nor the authority is liable on bonds issued, incurred, or created under §§ 5-12-48 to 5-12-59, inclusive, those bonds may not be a debt of the state or the authority, and §§ 5-12-48 to 5-12-59, inclusive, may not be construed as a guarantee by the state or the authority of the debts of the corporation. The bonds shall contain a statement to this effect on the face of the bonds.
SDCL 5-12-53