70 ILCS 3105/18
The fiscal year of each district shall commence July 1 and extend through the following June 30.
The board of each district shall on or before the second Tuesday in September of each year, adopt a combined annual budget and appropriation ordinance as provided in the Illinois Municipal Budget Law. In the case of districts composed of one county, such ordinance shall be submitted to the county board for review and approval, by county ordinance, before it becomes effective. In case the district is composed of only one township, such ordinance shall be submitted to the board of township trustees for review and approval, by township ordinance, before it becomes effective.
Except as otherwise provided in this Act, a district may annually levy taxes upon all the taxable property therein at the full, fair cash value thereof, as equalized or assessed by the Department of Revenue, to be extended at a rate not exceeding .05%.
After the adoption of the appropriation ordinance and on or before the second Tuesday in September of each year, the board shall ascertain the total amount of the appropriations legally made which are to be provided for from tax levies for the current year. Then, by an ordinance specifying in detail the purposes for which such appropriations have been made and the amounts appropriated for such purposes, the board shall levy not to exceed the total amount so ascertained upon all the property subject to taxation within the district as the same is assessed and equalized for state and county purposes for the current year. A certified copy of such ordinance shall be filed on or before the first Tuesday in October with the clerk of each county wherein the district or any part thereof is located.
70 ILCS 3105/18