SDCL § 10-10-1: Petition by freeholders for county classification of real property--Number of signers--Time of filing.

The board of county commissioners in any county in this state may, upon petition signed by at least twenty percent of the resident freeholder voters of the county and filed with the county auditor before April first of the year in which classification is sought, authorize the classification of all real property subject to taxation within such counties, for taxation purposes on the basis and in the manner hereinafter specified.