55 ILCS 5/5-1042
In any county with a population not in excess of 500,000 located in the area served by the Northeastern Illinois Metropolitan Planning Commission, a county board may establish by ordinance or resolution of record reasonable rules and regulations governing the location, width and course of streets and highways, and the provision of public grounds for schools, parks or playgrounds, in any map, plat or subdivision of any block, lot or sub-lot or any part thereof or any piece or parcel of land in the county, not being within any city, village or incorporated town in the county which rules and regulations may include such reasonable requirements with respect to water supply and sewage collection and treatment, and such reasonable requirements with respect to street drainage and surfacing, as may be established by the county board as minimum requirements in the interest of the health, safety and convenience of the public of the county; and may require by ordinance or resolution of record that any map, plat or subdivision shall be submitted to the county board or some officer to be designated by the county board for its or his approval in the manner provided in Section 5-1041, and to require bonds and charge fees as provided in Section 5-1041. This Section is subject to the provisions of Section 5-1123.
For purposes of implementing ordinances regarding developer donations or impact fees and only for the purpose of expenditures thereof, "public grounds for schools" is defined as including land or site improvements, which include school buildings or other infrastructure necessitated and specifically and uniquely attributable to the development or subdivision in question. This amendatory Act of the 93rd General Assembly applies to all impact fees or developer donations paid into a school district or held in a separate account or escrow fund by any school district or county for a school district.
55 ILCS 5/5-1042