The nine members of the Transportation Commission are appointed by the governor to four-year terms, within statutory requirements for party affiliation, residency and geographic representation (S.D. Codified Laws Ann. §§1-44-4 et seq.). The secretary of transportation is appointed by the governor, by and with the advice and consent of the Senate, and serves at the pleasure of the governor (S.D. Const. art. IV, §9; S.D. Codified Laws Ann. §1-32-3).