S.D. Codified Laws § 27A-11A-16
Within ten days of the attorney general's receipt of the committing board's findings regarding residence and summary of proofs thereon, the attorney general may request the committing board of mental illness to reopen the hearing by mailing a request to the chairman of the committing board of mental illness. Notice of the reopened hearing shall be given to any county adversely interested and to the attorney general at least ten days prior to the reopened hearing by mailing notice to the county auditor of any county adversely interested and to the attorney general. Any county adversely interested or the attorney general may present evidence to establish the residence of the person at the reopened hearing. The board shall then determine, by a preponderance of evidence, whether the person is a resident of a particular county or whether the patient is not a resident of the state and shall affirm or modify its prior finding. The ultimate finding of residence shall be filed with the clerk of courts of the committing county and copies thereof mailed to the administrator of the center or other facility where the patient is undergoing treatment and to the auditor of any county found to be the residence of the patient or to the attorney general if the person is found not to be a resident of the state.
Expenses incurred by the committing board in conducting any reopened hearing shall be paid by the referring county, subject to reimbursement by the county ultimately proven to be the county of residence or if a nonresident of the state, by the State of South Dakota.
SDCL 27A-11A-16