249.783.  Duties of officers. — 1.  The chairman of the board shall preside at all meetings, and execute all contracts into which the district may enter.  In the absence of the chairman the secretary shall assume his duties.

  2.  The secretary shall keep the official records of the meetings of the board, attest all official documents, make reports pertaining to the business of the district when requested to do so by the board, and perform all other duties imposed upon him by sections 249.760 to 249.810.

  3.  The treasurer shall be the custodian of the funds of the district and pay money out of the treasury only upon warrants drawn on the treasury.  Warrants shall be signed by the secretary and countersigned by the chairman.

  4.  The board from time to time may make additional rules and regulations concerning the duties of its officers and other employees.