S.D. Codified Laws § 11-6-37
The council, or, in the case of a street outside of the municipality, the governing body of such outside territory, may locate and construct or may accept any other street if the ordinance or other measure for such location and construction or for such acceptance be first submitted to the planning commission for its consideration, and, if disapproved by the commission, be passed by not less than two-thirds of the entire membership of the city council or said governing body. A street approval by the commission upon such submission, or constructed or accepted by a two-thirds vote after disapproval by the commission, has the status of an approved street as fully as though it had been originally shown on a subdivision plat approved by the council or on a plat made by the commission and adopted by the council or reviewed and approved in accordance with § 11-3-6.
SDCL 11-6-37