The corporation shall have a board of directors which shall be composed of the number of directors provided in the certificate of incorporation. All powers of the corporation shall be exercised by the board or pursuant to its authority. The directors shall be residents of the county and shall be elected by the governing body for staggered terms of office as follows: The first term of one third of the directors shall be two years, of another one third shall be for four years and of the remaining one third shall be six years and, thereafter, the term of office of each director shall be six years. If any director resigns or dies or becomes incapable of acting as a director or ceases to reside in the county, the governing body may elect a successor to serve for the unexpired period of his term. Directors shall be eligible for reelection by the governing body to succeed themselves in office. No director shall be an officer of the state, the county or any incorporated municipality. A majority of the members of the board shall constitute a quorum for the transaction of business. The corporation shall have a president, a vice-president, a secretary and a treasurer, but the offices of secretary and treasurer may be held by the same person. All officers shall be elected by the board. The members of the board and the officers shall serve without compensation, except that they may be reimbursed for actual expenses incurred in the performance of their duties. All proceedings of the board shall be reduced to writing by the secretary of the corporation and recorded in a well-bound book. Copies of such proceedings, when certified by the secretary of the corporation under its seal, shall be received in all courts as evidence of the matters and things therein certified.