No county board may alter the duties, powers and functions of county officers that are specifically imposed by law. A county board may alter any other duties, powers or functions or impose additional duties, powers and functions upon county officers. In the event of a conflict State law prevails over county ordinance.
55 ILCS 5/5-1087
Alteration of duties, powers and functions of county officers
P.A. 86-962.
Official source: Illinois General Assembly. Reproduced from public-domain Illinois statutes; confirm against the official source for the current text. Not legal advice.