S.D. Codified Laws § 34-27-31
If any state supported educational institution or state supported museum comes into possession of human skeletal remains or associated funerary objects from South Dakota following July 1, 1990, the institution or museum shall contact the state archaeologist within fifteen days of the find. Within a reasonable period of time from contact by the institution or museum, but not to exceed one year, the state archaeologist shall identify the remains or objects. If review by the state archaeologist demonstrates to his satisfaction that the remains or objects are not directly related to a tribal group, the state archaeologist is responsible for their final disposition after consultation with the director of the South Dakota State Historical Society. If review by the state archaeologist demonstrates to his satisfaction that there is a direct relationship of the remains or objects to a tribal group, the state archaeologist shall notify the director of the South Dakota State Historical Society and shall initiate contact with officials of that tribal group as designated by the Office of Indian Affairs. If, within one year of the first contact with the tribal group as set forth in this section, the tribal group requests return of the remains or objects, the state archaeologist shall turn over to the tribal group the remains or objects. If, within one year of the first contact with the tribal group as set forth in this section, the tribal group has not requested the return of the remains or objects, the state archaeologist is responsible for their final disposition after consultation with the director of the South Dakota State Historical Society.
SDCL 34-27-31