S.D. Codified Laws § 23A-46-7
Regardless of whether the director of the facility in which a person is hospitalized has filed a certificate as provided in this chapter, §§ 23A-10A-3 to 23A-10A-4.2, inclusive, 23A-26-12 to 23A-26-12.6, inclusive, or 23A-27-42 to 23A-27-46, inclusive, counsel for the person or his guardian may, at any time during such person's hospitalization, file with the court that ordered the commitment a motion for a hearing to determine whether the person should be discharged from such facility, but no such motion may be filed within one hundred eighty days of a court determination that the person should continue to be hospitalized. A copy of the motion shall be sent to the director of the facility in which the person is hospitalized and to the prosecuting attorney.
SDCL 23A-46-7