S.D. Codified Laws § 46A-4-53
The holder or holders of title or evidence of title, or the secretary of the interior for unentered public land, representing one-half or more of any body of lands which, taken together, constitute one tract of land, may file with the board of directors of such district a petition in writing, praying that the boundaries of such district may be so changed as to include such lands. The petition shall describe the boundaries of the parcel or tract of land and shall also describe the boundaries of the several parcels owned by the petitioners, if the petitioners be the owners, respectively, of distinct parcels, but such description need not be more particular than may be required when such lands are entered by the county director of equalization in the assessment book. Such petition must contain the assent of the petitioners to the inclusion in such district of the parcels or tracts of land described in the petition, and of which the petition alleges that they are respectively the owners; and it must be acknowledged in the same manner that conveyances of land are required to be acknowledged.
SDCL 46A-4-53