55 ILCS 5/3-4005

The person appointed as Public Defender, before entering on the duties of his office, shall take and subscribe an oath of office in writing before one of the judges competent to appoint, which oath shall be filed in the office of the County Clerk. (Text of Section after amendment by P.A. 104-300) Sec. 3-4005. Oath of office. The person appointed as Chief County Public Defender, before entering on the duties of his office, shall take and subscribe an oath of office in writing before one of the judges qualified to administer it, which oath shall be filed in the office of the County Clerk.