Mo. Rev. Stat. § 172.090
There shall be a president and vice president of the board, who shall be chosen by the board from the members thereof, a secretary, treasurer, and such other officers of the board as they shall deem necessary, who shall be appointed by the board, and hold their offices during the pleasure of the board.
(RSMo 1939 § 10797)
Prior revisions: 1929 § 9640; 1919 § 11537; 1909 § 11111