105 ILCS 5/3-14.20
To inspect the building plans and specifications, including but not limited to plans and specifications for the heating, ventilating, lighting, seating, water supply, toilets and safety against fire of public school rooms and buildings submitted to him by school boards, and to approve all those which comply substantially with the building code authorized in Section 2-3.12.
If a municipality or, in the case of an unincorporated area, a county or, if applicable, a fire protection district wishes to be notified of plans and specifications received by a regional office of education for any future construction or alteration of a public school facility located within that entity's jurisdiction, then the entity must register this wish with the regional superintendent of schools. Within 10 days after the regional superintendent of schools receives the plans and specifications from a school board and prior to the bidding process, he or she shall notify, in writing, the registered municipality and, if applicable, the registered fire protection district where the school that is being constructed or altered lies that plans and specifications have been received. In the case of an unincorporated area, the registered county shall be notified. If the municipality, fire protection district, or county requests a review of the plans and specifications, then the school board shall submit a copy of the plans and specifications. The municipality and, if applicable, the fire protection district or the county may comment in writing on the plans and specifications based on the building code authorized in Section 2-3.12, referencing the specific code where a discrepancy has been identified, and respond back to the regional superintendent of schools within 15 days after a copy of the plans and specifications have been received or, if needed for plan review, such additional time as agreed to by the regional superintendent of schools. This review must be at no cost to the school district.
If such plans and specifications are not approved or denied approval by the regional superintendent of schools within 3 months after the date on which they are submitted to him or her, the school board may submit such plans and specifications directly to the State Superintendent of Education for approval or denial.
105 ILCS 5/3-14.20