35 ILCS 200/3-5
In counties with less than 3,000,000 inhabitants and in which no county assessor has been elected under Section 3-45, there shall be a county supervisor of assessments, either appointed as provided in this Section, or elected.
In counties with less than 3,000,000 inhabitants and not having an elected county assessor or an elected supervisor of assessments, the office of supervisor of assessments shall be filled by appointment by the presiding officer of the county board with the advice and consent of the county board.
To be eligible for appointment or to be eligible to file nomination papers or participate as a candidate in any primary or general election for, or be elected to, the office of supervisor of assessments, or to enter upon the duties of the office, a person must possess one of the following qualifications as certified by the Department to the county clerk:
In addition, a person must have had at least 2 years' experience in the field of property sales, assessments, finance or appraisals and must have passed an examination conducted by the Department to determine his or her competence to hold the office. The examination may be conducted by the Department at a convenient location in the county or region. Notice of the time and place shall be given by publication in a newspaper of general circulation in the counties, at least one week prior to the exam. The Department shall certify to the county board a list of the names and scores of persons who pass the examination. The Department may provide by rule the maximum time that the name of a person who has passed the examination will be included on a list of persons eligible for appointment or election. The term of office shall be 4 years from the date of appointment and until a successor is appointed and qualified, or a successor is elected and qualified under Section 3-52.
( 35 ILCS 200 /Art. 10 Div. 6 heading)
Division 6. Farmland, open space, and forestry management plan
35 ILCS 200/3-5