The affairs of the association shall be managed by a board of not less than five directors elected by the members or stockholders from their own number. The bylaws may provide that the territory in which the association has members shall be divided into districts and that the directors shall be elected according to such districts. In such a case the bylaws shall specify the number of directors to be elected by each district and the manner and method of reapportioning the directors and of redistricting the territory covered by the association. The bylaws may provide that primary elections should be held in each district to elect the directors apportioned to such districts and that the result of all such primary elections must be ratified by the next meeting of the association. The bylaws may provide that one or more directors may be appointed by the director of the extension service of Clemson University. The director or directors so appointed need not be members or stockholders of the association but shall have the same powers and rights as other directors.