NOTICE. For the purposes of the Agreement, notices and all other communications provided for in the Agreement shall be in writing and shall be deemed to have been duly given on the date hand delivered or the date mailed by United States registered mail, return receipt requested, postage prepaid, addressed to the Executive at his residence address and to the Corporation directed to the attention of the Chief Executive Officer of the Corporation, or to such other address as either party may have furnished to the other in writing in accordance herewith, except that notices of change of address shall be effective only upon receipt.