Illinois Statutes Chapter 105. Schools § 5/11E-15. School district conversion

(a) One or more unit districts and one or more high school districts, all of which are contiguous, may, under the provisions of this Article, be converted into a dual district through the dissolution of the unit district or districts and the high school district or districts if the following apply:

(b) Two or more contiguous unit districts may, under the provisions of this Article, dissolve and form a single new high school district and new elementary districts that are based upon the boundaries of the dissolved unit districts.