and shall be delivered personally or mailed by certified or registered mail, postage prepaid, return receipt requested (in which case it shall be deemed given three (3) days after mailing), or sent by facsimile, with a confirmation copy simultaneously mailed (in which case it shall be deemed given when transmitted), at the addresses set forth on the signature page or to such other address as to which any party hereto may notify the other parties hereto as aforesaid.