No failure or delay on the part of any Purchaser in exercising any right, power or remedy pursuant to the Documents shall operate as a waiver thereof, nor shall any single or partial exercise of any such right, power or remedy preclude any other or further exercise thereof, or the exercise of any other right, power or remedy.  No provision of the Documents may be waived, modified, supplemented or amended except in a written instrument signed, in the case of an amendment, by the Company and the Purchasers, or, in the case of a waiver, by the party against whom enforcement of any such waived provision is sought. Any waiver of any provision of the Documents and any consent by any Purchaser to any departure by the Company from the terms of any provision of the Documents shall be effective only in the specific instance and for the specific purpose for which given.  No notice to or demand on the Company in any case shall entitle the Company to any other or further notice or demand in similar or other circumstances.