70 ILCS 3305/2b
The owner or owners of record of any area of land consisting of one or more tracts lying within the boundaries of any street lighting district which (1) is not contiguous in whole or in part to any other street lighting district; (2) contains 20 or more acres; (3) is not subdivided into residential lots and blocks; (4) is located on the border of the street lighting district; and (5) which, if disconnected, will not result in the isolation of any part of the street lighting district from the remainder of the street lighting district, may have the area disconnected as follows:
The owner or owners of record of any such area of land shall file a petition in the circuit court of the county where the land is situated alleging facts in support of the disconnection. The street lighting district from which disconnection is sought shall be made a defendant and it or any taxpayer residing in that street lighting district, may appear and defend against the petition. If the court finds that the allegations of the petition are true and that the area of land is entitled to disconnection, it shall order the specified land disconnected from the designated street lighting district.
The area of land or any part thereof disconnected from a street lighting district under the provisions of this section shall not be annexed or added to a street lighting district or included in any petition seeking annexation or addition to any street lighting district, for a period of 2 years from the date of such disconnection.
The disconnection of any such area of land shall not exempt it from taxation for the purpose of paying any indebtedness contracted by the corporate authorities of the street lighting district prior to the filing of the petition for disconnection. On the contrary, the territory designated shall be assessed and taxed to pay such indebtedness until this indebtedness is completely paid the same as though the territory had not been disconnected.
70 ILCS 3305/2b