S.D. Codified Laws § 1-16A-56
When the principal of and interest on bonds issued by the authority to finance the cost of facilities or to refinance outstanding indebtedness of one or more participating health institutions or participating educational institutions, as the case may be, including any refunding bonds issued to refund and refinance such bonds, have been fully paid and retired or when adequate provision has been made to fully pay and retire the same, and all other conditions of the resolution, the lease, the trust indenture and the mortgage or deed of trust, if any, authorizing and securing the same have been satisfied and the lien of such mortgage or deed of trust has been released in accordance with the provisions thereof, the authority shall promptly do all things and execute such deeds and conveyances as are necessary and required to convey its right, title and interest in such facilities so financed, and any other facilities mortgaged to secure the bonds, to such participating health institution or institutions or to such participating educational institution or institutions, as the case may be.
SDCL 1-16A-56