All notices hereunder shall be in writing, shall be delivered personally or sent by certified or registered mail, postage prepaid, return receipt requested, or by express or other delivery service, if to Executive, to his attention at the address set forth below and, if to Company, to the attention of the Board at the address set forth below. All notices hereunder shall be deemed effective when received as set forth above. No notice shall be effective if given otherwise than as provided herein.