Any contiguous portion of an elementary school district that constitutes 5% or less of the equalized assessed value of the district and 5% or less of the territory of the district shall upon petition of two-thirds of the registered voters of the territory proposed to be detached and annexed be so detached and annexed by the regional board of school trustees if granting such petition shall make the affected segment of the boundaries of the elementary school district the territory is proposed to be annexed to identical, for the entirety of such affected segment, to the boundaries of the high school district in which the territory is located.
The regional board of school trustees shall have no authority or discretion to hear any evidence or consider any issues except those that may be necessary to determine whether the limitations and conditions of this Section have been met.
No district may lose more than 5% of its equalized assessed value or more than 5% of its territory through petitions filed under this Section. If a petition seeks to detach territory that would result in a cumulative total of more than 5% of a district's equalized assessed value or more than 5% of the district's territory being detached under this Section, the petition shall be denied without prejudice to its being filed pursuant to Section 7-6 of this Code. Notwithstanding any other provision of this Section, this paragraph shall apply to any detachments effected pursuant to the provisions of this Section as they existed prior to the effective date of this amendatory Act of the 91st General Assembly.
The changes made by this amendatory Act of the 91st General Assembly shall not apply to petitions pending on the effective date of this amendatory Act of the 91st General Assembly.
105 ILCS 5/7-2b