The commission shall appoint a medical staff. Such appointments shall be made upon the recommendations of the physicians who are authorized to practice within the hospital.
It shall be the duty of the medical staff:
(1) To provide professional care of the sick and injured in the hospitals;
(2) To give advice and assistance to the commission and director relating to standards of operation and professional problems;
(3) To participate in the educational activities of the district;
(4) To promulgate rules and regulations for the conduct of the medical staff for approval of the commission;
(5) To elect annually one of its members as chief of staff and to elect from its members the heads of any specialized services of the hospital; and
(6) To approve the appointment of the hospital director made by the commission.