S.D. Codified Laws § 11-7-83
Until the commission certifies that all building construction and other physical improvements specified to be done and made by the purchaser or lessee of real property in a redevelopment project area have been completed, the purchaser or lessee shall have no power to convey or assign the real property, any part thereof or interest therein, without the consent of the commission, and no such consent shall be given unless the grantee or assignee of the purchaser or lessee obligates itself or himself by written instrument to the commission to carry out that portion of the redevelopment plan relating to such property, and also that the grantee, his or its heirs, representatives, successors, and assigns, shall have no right or power to convey, lease, or assign the property, any part thereof or interest therein, or erect or use any building or structure erected thereon, free from the obligation and requirement to conform to the approved redevelopment plan or approved modifications thereof.
SDCL 11-7-83