SDCL § 9-10-5: Commissioner form--Number, election, and terms of commissioners.

In all commission-governed municipalities employing a city manager, the number of at-large commissioners is nine, each elected to a term of three years, or four years if the commission has chosen to hold the regular municipal election only in even-numbered years, pursuant to § 9-13-1.3.

At the first election, nine commissioners must be elected, three to serve until the next regular election, three to serve until the second regular election thereafter, and three to serve until the third regular election thereafter. If the commission has chosen to hold the regular municipal election only in even-numbered years, pursuant to § 9-13-1.3, five commissioners are elected to serve a term of two years and four commissioners are elected to serve a term of four years. At each regular municipal election thereafter, three at-large commissioners must be elected for a term of three or four years each, as applicable.