Except in any proceeding in which the tax purchaser is a county acting as a trustee for taxing districts as provided in Section 21-90, an order for the issuance of a tax deed under this Code shall not be entered affecting the title to or interest in any property in which a county, city, village or incorporated town has an interest under the police and welfare power by advancements made from public funds, until the purchaser or assignee makes reimbursement to the county, city, village or incorporated town of the money so advanced or the county, city, village, or town waives its lien on the property for the money so advanced. In lieu of reimbursing the county, city, village, or town for any advancement of money that have not been waived , the purchaser or his or her assignee may make application for and the court shall order that the tax purchase be set aside as a sale in error. However, a sale in error may not be granted under this Section if:
A filing or appearance fee shall not be required of a county, city, village or incorporated town seeking to enforce its claim under this Section in a tax deed proceeding.
35 ILCS 200/22-35