If upon a canvass of the votes cast, as provided in § 7-6-2, any municipality shall have received a majority of all votes cast at such election, the question of location of the county seat shall not again be submitted before the expiration of four years; provided that where such vote has already been had without a choice of location, the question of location of the county seat shall not again be submitted until the expiration of four years from the last election held therefor.
SDCL 7-6-3