S.D. Codified Laws § 11-2-28.1
An individual landowner may petition the board to change the zoning of all or any part of the landowner's property. The petitioning landowner shall notify abutting and adjoining landowners by registered or certified mail of the petitioned zoning change at least ten days before the public hearing is held on the matter by the planning commission. The landowner shall use information provided by the county director of equalization to determine the abutting and adjoining land owners. Property is considered as abutting and adjoining even though it may be separated from the property of the petitioner by a public road or highway. If the affected property abuts, adjoins, or is within one mile of a county border, the county auditor on behalf of the individual landowner shall also notify, by registered or certified mail, the county auditor in the adjoining county of the petitioned zoning change at least ten days before the public hearing is held on the matter by the planning commission.
SDCL 11-2-28.1