Notices  and  all  other  communications  contemplated  by  this  Agreement shall be in writing and shall be deemed to have been duly given when personally delivered (if to the Company, addressed to its Secretary at the Company’s principal place of business on a non­ holiday weekday between the hours of 9 a.m. and 5 p.m.; if to Executive, via personal service to his last known residence) or three business days following the date it is mailed by U.S. registered or certified mail, return receipt requested and postage prepaid.