Notices and all other communications provided for in this Agreement shall be in writing and shall be deemed to have been duly given when (i) personally delivered or (ii) mailed by United States certified or registered mail, return receipt requested, postage prepaid, addressed to the respective addresses set forth on the first page of this Agreement; provided that all notice to the Company shall be directed to the attention of the Board with a copy to the Chief Executive Officer of the Company, or to such other address as either party may have furnished to the other in writing in accordance herewith, except that notice of change of address shall be effective only upon receipt.