70 ILCS 755/35
The board shall adopt an annual budget for the district in accordance with the fiscal year adopted by the county board. The budget shall include expected revenues by source and expenditures by project or by function for the following year. The budget must be approved by the county board prior to any expenditure by the district for the fiscal year. The county board must approve or disapprove the budget of the board within 30 calendar days after the budget is received by the county board. If the county board does not act to approve or disapprove the budget within 30 calendar days of receipt, it shall stand as approved. In addition, the board shall submit an annual report to the county board by the last day of the fiscal year detailing the activities of the district.
70 ILCS 755/35