shall be entitled to exercise its rights under this Agreement and to require strict performance by the other of the terms, conditions, undertakings and covenants contained herein. No election not to exercise, failure to exercise or delay in exercising any right whether wholly or partially shall operate or be construed as a waiver of any right of the parties. A waiver of any right under this Agreement shall be effective only made in written for and in the specific instance and for the specific purpose for which given, and shall not be considered to be a waiver of the provision conferring such right or any other provision of this contract, or any right which will accrue after such waiver.