S.D. Codified Laws § 11-9-20
Upon receiving an application by the county auditor or municipal finance officer, as applicable, on a form prescribed by the department, the department must determine the aggregate assessed value of the taxable property in the district, which aggregate assessed value, on certification to the county auditor or the municipal finance officer, as applicable, is the tax increment base of the district. The application must be accompanied by a detailed parcel list of the included legal descriptions, property ownership, and value, as provided by the director of equalization office, of the affected corresponding county. Except as provided in § 11-9-20.1, the department shall use the values, as last previously certified by the department, adjusted for the value to the date the district was created, for any completed buildings or additions and without regard to any reduction pursuant to §§ 1-19A-20, 10-6-137, 10-6-137.1, and 10-6-144.
SDCL 11-9-20