If the mayor or a commissioner resigns, the resignation shall be submitted in writing to the board.
If the mayor or a commissioner moves his or her permanent residence outside the corporate limits of the municipality, the office is immediately vacated.
If there is a vacancy in the office of mayor, the vacancy shall be filled by appointment pursuant to § 9-9-8 until the position is filled by election at the next annual municipal election or by special election as provided in § 9-13-14.2. A vacancy on the board shall be filled as provided in § 9-13-14.1 or 9-13-14.2.
SDCL 9-9-6