55 ILCS 5/3-14049
The appointment, employment and removal by the Board of Commissioners of Cook County of all physicians and surgeons, advanced practice registered nurses, physician assistants, and nurses for the care and treatment of the sick, poor, mentally ill or persons in need of mental treatment of said county shall be made only in conformity with rules prescribed by the County Civil Service Commission to accomplish the purposes of this Section.
The Board of Commissioners of Cook County may provide that all such physicians and surgeons who serve without compensation shall be appointed for a term to be fixed by the Board, and that the physicians and surgeons usually designated and known as interns shall be appointed for a term to be fixed by the Board: Provided, that there may also, at the discretion of the board, be a consulting staff of physicians and surgeons, which staff may be appointed by the president, subject to the approval of the board, and provided further, that the Board may contract with any recognized training school or any program for health professionals for health care services of any or all of such sick or mentally ill or persons in need of mental treatment.
55 ILCS 5/3-14049