S.D. Codified Laws § 42-7-61
An application for a license to conduct the racing of horses or dogs on any new site which has not before July 1, 1967, been utilized for the conduct of racing horses or dogs, shall first be submitted, not less than ninety days prior to the next general election, to the board of county commissioners of the county where the site is to be located. The board of county commissioners shall notify the county auditor of each county which has any portion of its border within fifteen miles of the proposed site. Upon receipt of such notice, the county auditor of each county shall take the necessary action to provide that a vote shall be conducted at the next general election for the purpose of approving or disapproving such proposed site.
SDCL 42-7-61