55 ILCS 5/3-11017: No retention of compensation other than salary.

The county treasurer shall retain no fees, commissions or other compensation whatsoever, except his salary or other compensation fixed by law, for his services when acting as such county treasurer or in any other official capacity incident to his incumbency of that office. All fees, perquisites and emoluments (above the amount of such salary or other compensation fixed by law) shall be paid into the county treasury.