(a) The Board and the UFF acknowledge that during the negotiations that resulted in this Agreement, the parties had the unlimited right and opportunity to present demands and proposals with respect to any and all matters lawfully subject to collective bargaining.
(b) The Board and the UFF further acknowledge that all of the understandings and agreements arrived at thereby are set forth in this Agreement, and that it will constitute the entire and sole Agreement between the parties for its duration.
33.2 No Further Obligation to Bargain. The Board and the UFF, during the term of this Agreement, voluntarily and unqualifiedly waive the right, and agree that the other will not be obligated, to bargain collectively with respect to any subject or matter, whether or not referred to or covered by this Agreement, even though such subject or matter may not have been within the knowledge or contemplation of the parties at the time they negotiated or signed this Agreement.
33.3 Modifications. Nothing herein will, however, preclude the Board and the UFF from mutually agreeing to alter, amend, supplement, delete, enlarge, or modify in writing any of the provisions of this Agreement.