70 ILCS 750/40
The District shall adopt an annual budget by August 31 of each year for the fiscal year beginning October 1. Such 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 of the county in which the district is situated prior to any expenditure by the District for the fiscal year beginning October 1. The county board must approve or disapprove the budget of the District 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 District shall submit an annual report to the county board by August 31 of each year detailing the activities of the district. This report must also include any information submitted to the flood prevention district by a drainage, levee, or sanitary district in accordance with Section 4-45 of the Illinois Drainage Code or Section 2-2 of the Metro-East Sanitary District Act.
70 ILCS 750/40