The directors shall elect a president, one or more vice-presidents, a secretary and treasurer who need not be directors, and they may combine the offices of secretary and treasurer designating the combined office as secretary-treasurer. They shall elect from their number a chairman and vice-chairman unless the president and vice-presidents are members of the board. The board may elect or appoint such additional officers as are necessary and appropriate. The treasurer may be a bank or any depository, and as such shall not be considered an officer, but as a function of the board of directors. In such a case the secretary shall perform the usual accounting duties of the treasurer, excepting that the funds shall be deposited only as authorized by the board of directors. (1921, c. 87, s. 13; C.S., s. 5259(t); 1971, c. 925.)