S.D. Codified Laws § 19-19-806.1
A statement made by a child under the age of thirteen, or by a child thirteen years of age or older who is developmentally disabled as defined in § 27B-1-18, describing any act of sexual contact or rape performed with or on the child by another, or describing any act of physical abuse or neglect of the child by another, or any act of physical abuse or neglect of another child observed by the child making the statement, not otherwise admissible by statute or court rule, is admissible in evidence in criminal proceedings against the defendant or in any proceeding under chapters 26-7A, 26-8A, 26-8B, and 26-8C in the courts of this state if:
However, if the child is unavailable as a witness, such statement may be admitted only if there is corroborative evidence of the act.
No statement may be admitted under this section unless the proponent of the statement makes known the proponent's intention to offer the statement and the particulars of it, including the name and address of the declarant to the adverse party sufficiently in advance of the trial or hearing to provide the adverse party with a fair opportunity to prepare to meet the statement.
SDCL 19-19-806.1