At any time, either Assembly or Allergan may (a) with respect to obligations owed to it or the performance of other acts for its benefit, extend the time for the performance of such obligations or such other acts to be performed hereunder by the other, (b) waive any inaccuracies in the representations and warranties of the other contained herein or in any document delivered pursuant hereto and (c) waive compliance with any of the conditions to the obligations of the other contained herein. Any agreement on the part of either Party to any such extension or waiver shall be valid only if set forth in an instrument executed by such Party. No such waiver shall be operative as a waiver of any other subsequent requirement of this Agreement. The failure of any Party to assert any of its rights under this Agreement or otherwise shall not constitute a waiver of such rights.