SDCL § 34-11A-1: Petition by voters or resolution by county commissioners for establishment of district.

If persons in any rural territory request to form, organize, establish, equip, and maintain an ambulance district, the petition shall be presented to the county auditor of each county in which the territory is situated setting forth their desires and purposes. Alternatively, the board of county commissioners in each county where the ambulance district would be situated may initiate formation of the district by resolution.