105 ILCS 5/34-8.1a
Notwithstanding the provisions of any law or collective bargaining agreement to the contrary, the principal, with the concurrence of at least 63.5% through August 31, 1995, and 51% thereafter of an attendance center's personnel in the teachers' bargaining unit, whether certificated or uncertificated non-academic, shall have the right to declare waived and superseded a provision of the teachers' collective bargaining agreement as it applies in or at the attendance center to the bargaining unit's employees. Any collective bargaining agreement entered into after the effective date of this amendatory Act of 1995 with a bargaining unit other than the teachers' bargaining unit shall contain a waiver procedure that meets the requirements of this Section.
Any waiver approved as provided in this Section shall be final upon concurrence of the required percentage of personnel and shall not be subject to approval or rejection by a bargaining unit or a committee of the bargaining unit.
105 ILCS 5/34-8.1a