105 ILCS 5/7-7
The decision of the regional board of school trustees or the decision of the State Superintendent of Education in cases determined pursuant to subsection (l) of Section 7-6 of this Code shall be deemed an "administrative decision" as defined in Section 3-101 of the Code of Civil Procedure; and any resident, petitioner, or board of education entitled to receive a certified copy of the regional board of school trustees' order may, within 35 days after a copy of the decision sought to be reviewed was served by certified mail, return receipt requested, upon the resident, petitioner, or board of education, thereby file a complaint for a judicial review of such decision in accordance with the Administrative Review Law and the rules adopted pursuant thereto. The commencement of any action for judicial review shall operate as a stay of enforcement, and no further proceedings shall be had until final disposition of such review. The circuit court of the county in which the dissolving district or detaching territory is located shall have sole jurisdiction to entertain a complaint for such review . In instances in which the dissolving district or detaching territory overlies more than one county, the circuit court of the county where a majority of the territory of the dissolving district or a majority of the territory of the detaching territory is located shall have sole jurisdiction to entertain a complaint for such review.
105 ILCS 5/7-7