All demands, notices and communications under this Agreement shall be in writing, personally delivered or mailed by certified mail, return receipt requested, or overnight delivery service, by facsimile or by electronic mail (if an address therefore has been provided by the respective party in writing) and shall be deemed to have been duly given upon receipt by such party at the address set forth on Schedule A to this Agreement or at such other address as shall be designated by written notice to the other parties.