S.D. Codified Laws § 13-54-11
Immediately after the boards of county commissioners have voted to establish cooperative extension work under the provisions of this chapter, they shall appoint a county extension board of five to seven members. At least two members shall be farmers and one a member of the board of county commissioners who may also be one of the farmer representatives. No person shall be denied membership on the grounds of sex, race, color, creed, or national origin. The membership shall be representative of the racial population mix in the county and of the various interest groups served by extension. The members of this board shall be appointed for a period of one year and their terms shall expire on the tenth of January each year. This board shall, at its first meeting after January tenth each year, organize and elect from their membership a president, vice president, and secretary-treasurer.
SDCL 13-54-11