Whenever any notice is required or permitted hereunder, such notice must be in writing and personally delivered or sent by mail. Any notice required or permitted to be delivered hereunder will be deemed to be delivered on the date that it is personally delivered or, whether actually received or not, on the third (3rd) business day after it is deposited in the United States mail, certified or registered, postage prepaid, addressed to the person who is to receive it at the address that such person has heretofore specified by written notice delivered in accordance herewith. The Company or Smith may change, at any time and from time to time, by written notice to the other, the address that it or he had therefore specified for receiving notices.