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 director of the facility or program where the person is undergoing treatment and to the auditor of any county found to be the residence of the person or to the attorney general if the person is found not to be a resident of the state.
SDCL 27B-7-32.6