The board of commissioners may adopt its own rules of procedure, in keeping with the size and nature of the board and in the spirit of generally accepted principles of parliamentary procedure. (Code, s. 706; Rev., s. 1317; C.S., s. 1296; 1945, c. 132; 1951, c. 904, s. 1; 1961, c. 154; 1967, c. 617, s. 1; 1969, c. 349, s. 1; c. 1036; 1973, c. 822, s. 1.)