S.D. Codified Laws § 1-26-25
A final decision or order adverse to a party in a contested case shall be in writing or stated in the record. It may affirm, modify, or nullify action previously taken or may direct the taking of new action within the scope of the notice of hearing. It shall include findings of fact and conclusions of law, separately stated. Findings of fact, if set forth in statutory language, shall be accompanied by a concise and explicit statement of the underlying facts supporting the findings. If, in accordance with agency rules, a party submitted proposed findings of fact, the decision shall include a ruling upon each proposed finding. Parties shall be notified either personally or by mail of any decision or order. Upon request a copy of the decision or order shall be delivered or mailed forthwith to each party and to his attorney of record.
SDCL 1-26-25