If the board of county commissioners has not adopted a formula pursuant to § 10-6-137 or 10-6-137.1, the governing board of a municipality in which the structures or property are located, or within three miles of the corporate limits of the municipality, may adopt a formula for assessed value pursuant to § 10-6-137 or 10-6-137.1.
In the case of residential structures described in § 10-6-137(5), (6), and (7), the governing board of a municipality may adopt a formula that differs from any formula adopted by the board of county commissioners, provided the formula complies with § 10-6-137.1.
SDCL 10-6-138