(a) The authority shall be under the direction and supervision of a board of directors to be composed of seven members as follows:

(1) Two members appointed and removed by the Speaker of the House of Representatives, one of whom, at the time of his or her appointment, shall be the manager of a county water and sewer authority and one of whom shall be the mayor of a municipal corporation which provides water and waste-water services;

(2) Two members appointed and removed by the President of the Senate, one of whom, at the time of his or her appointment, shall be the manager of a city or county water system and one of whom, at the time of his or her appointment, shall be a municipal employee responsible for the provision of water and waste-water services;

(3) The executive director and the deputy director of the Georgia Soil and Water Conservation Commission; and

(4) The executive director of the Georgia Environmental Facilities Authority.

(b) Members of the authority shall not be entitled to compensation for the duties they perform as members of the institute. Each member shall, however, be entitled to reimbursement for travel and other necessary expenses incurred in the performance of official duties.