For purposes of §§ 10-3-41, 10-12-31.1, and 10-13-37, the secretary of revenue shall calculate a factor for each county for nonagricultural valuations. The factor shall be calculated by using the sales of arms-length transactions and the assessments from the preceding assessment year. The secretary shall take into consideration any reappraisals completed by the director of equalization. If there are fewer than fifteen sales, the secretary shall use the preceding year's sales of that class with current assessments.
SDCL 10-13-37.1