The district board of directors shall:
(1) Adopt a seal;
(2) Keep a record of all proceedings, minutes, certificates, contracts, bonds, and employees' records and other business transacted by the directors;
(3) Adopt bylaws, procedures, and requirements consistent with this chapter;
(4) Meet annually and at such other times as may be necessary. A meeting may be called at any time by the chairman or at the request of any director through the chairman. If so requested, the secretary of the district shall mail a notice of such meeting to each member at least ten days prior to the meeting.