S.D. Codified Laws § 10-11-48
Whenever assessments may be equalized pursuant to § 10-11-47, the secretary of revenue shall equalize the assessment of land and structures thereon, separately, by adding to the aggregate value thereof, in every county in which the secretary of revenue may believe the valuation to be less than required by law for assessment purposes, such rate percent as will raise the same to its proper proportionate value, and by deducting from the aggregate assessed value thereof, in every county in which the secretary of revenue may believe the value to be more than required by law for assessment purposes, such percent as will reduce the same to its proper proportionate value. Town and city lots shall be equalized in the same manner as herein provided for equalizing lands.
Any person aggrieved by the actions of the secretary of revenue taken pursuant to this section and §§ 10-11-47 and 10-11-50 may appeal to the Office of Hearing Examiners, which appeal shall be taken and conducted pursuant to the provisions of chapter 1-26. A decision of the Office of Hearing Examiners shall be final without further agency action.
SDCL 10-11-48