55 ILCS 5/5-32004
The Committee may originate a local improvement as defined in this Division anywhere in the county outside of a municipality, as defined in Section 1-1-2 of the "Illinois Municipal Code", as amended, such improvement to be paid for by special assessment, either with or without a petition, by the adoption of a resolution describing the local improvement abutting or within the platted subdivision to be so improved. This resolution shall be at once transcribed into the records of the Committee and shall be presented to the members of the county board at any regularly scheduled meeting accompanied by a recommendation from the Committee for the adoption of a resolution by the county board describing the public way to be so improved.
A resolution adopted without a petition shall be revoked by the county board without further action on the improvement sought if the owners of record of more than one-half of the property abutting on or within any platted subdivision located outside the boundaries of a municipality object, by petition, by individual objections in writing, or by a combination of petitions and individual objections. Objections and petitions against an improvement shall be filed within 30 days of notification to the owners of record of the assessment.
Proceedings to make a local improvement also may be instituted whenever the owners of record of one-half the property abutting on or within any platted subdivision located outside the boundaries of a municipality, petitions the Committee of the county for a local improvement thereon. The Committee shall present such petition to the members of the county board at a regularly scheduled meeting, and recommend the adoption of a resolution by the board describing the public way to be so improved. If the resolution is so adopted by the county board, the Committee of local improvements shall proceed with all of the necessary steps for the improvement.
55 ILCS 5/5-32004