70 ILCS 1505/16b
Upon receipt of notice from the comptroller of a municipality with a population of 500,000 or more, a county with a population of 3,000,000 or more, the Cook County Forest Preserve District, the Metropolitan Water Reclamation District, the Chicago Transit Authority, the Chicago Board of Education, or a housing authority of a municipality with a population of 500,000 or more that a debt is due and owing the municipality, the county, the Cook County Forest Preserve District, the Metropolitan Water Reclamation District, the Chicago Transit Authority, the Chicago Board of Education, or the housing authority by an employee of the Chicago Park District, the District may withhold, from the compensation of that employee, the amount of the debt that is due and owing and pay the amount withheld to the municipality, the county, the Cook County Forest Preserve District, the Metropolitan Water Reclamation District, the Chicago Transit Authority, the Chicago Board of Education, or the housing authority; provided, however, that the amount deducted from any one salary or wage payment shall not exceed 25% of the net amount of the payment. Before the District deducts any amount from any salary or wage of an employee under this Section, the municipality, the county, the Cook County Forest Preserve District, the Metropolitan Water Reclamation District, the Chicago Transit Authority, the Chicago Board of Education, or the housing authority shall certify that (i) the employee has been afforded an opportunity for a hearing to dispute the debt that is due and owing the municipality, the county, the Cook County Forest Preserve District, the Metropolitan Water Reclamation District, the Chicago Transit Authority, the Chicago Board of Education, or the housing authority and (ii) the employee has received notice of a wage deduction order and has been afforded an opportunity for a hearing to object to the order. For purposes of this Section, "net amount" means that part of the salary or wage payment remaining after the deduction of any amounts required by law to be deducted and "debt due and owing" means (i) a specified sum of money owed to the municipality, the county, the Cook County Forest Preserve District, the Metropolitan Water Reclamation District, the Chicago Transit Authority, the Chicago Board of Education, or the housing authority for city services, work, or goods, after the period granted for payment has expired, or (ii) a specified sum of money owed to the municipality, the county, the Cook County Forest Preserve District, the Metropolitan Water Reclamation District, the Chicago Transit Authority, the Chicago Board of Education, or the housing authority pursuant to a court order or order of an administrative hearing officer after the exhaustion of, or the failure to exhaust, judicial review.
70 ILCS 1505/16b