Any and all notices required in connection with this Agreement shall be deemed adequate y given only if in writing and (a) personally delivered, or sent by first class, registered or certified mail, postage prepaid, return receipt requested, or by recognized overnight courier, or (b) sent by facsimile, provided a hard copy is mailed on that date to the party for whom such notices are intended. A written notice shall be deemed to have been given to the recipient party on the earlier of (a) the date it shall be personally delivered or delivered to the address required by this Agreement; (b) the date delivery shall have been refused at the address' required by this Agreement; (c) with respect to notices sent by mail or overnight courier, the date which is 24 hours after the mailing date; or (d) with respect to a facsimile, the date on which the facsimile is sent and receipt of which is confirmed. Any and all notices referred to in this Agreement, or which either party desires to give to the other, shall be addressed to his residence in the case of the Employee, or to its principal office in the case of the Company, to the attention of its Chairman.