Section 55 ILCS 5/3-12003 - Classified and unclassified serviceThe county service shall be divided into the classified and unclassified service. All offices and positions of the county shall be in the classified service unless specially designated as being in the unclassified service by this Division. Positions in the unclassified service shall include the following:
(1) officials elected at large in the county and up to three chief assistants to each such elected official;(3) officials and employees whose appointment and removal is otherwise provided by law;(5) chief deputies, assistant chief deputies, first assistants to department managers and second assistants to department managers, according to the following standards: a.in offices of fewer than 20 full time employees, one chief deputy or first assistant to the department manager;b.in offices of more than 20 people, the chief deputy or first assistant and the assistant chief deputy or second assistant;(6) private secretaries to all those exempted persons except attorneys below the rank of second assistant; and(7) all part-time or temporary employees.