SDCL § 2-15-10: Slate voting at general election.

The electors may vote for all of the candidates either in favor of or those opposed to the ratification of said amendment, by putting a cross () or check mark () in the circle at the head of the names in the column under the designation "In Favor of" the ratification, or in the circle at the head of the names in the column under the designation "Opposed to" the ratification, and a ballot so marked in said circle shall be counted as a vote, by the judges and canvassers, for each of the delegates respectively, whose name or names appear in the column under the circle so marked.