All notices and demands which may or are required to be given by either party to the other hereunder shall be in writing, and delivered in person or sent by either United States certified mail, return receipt requested, postage prepaid or by Federal Express or other nationally recognized overnight delivery service. Notices and demands to Tenant shall be addressed to it at the address set forth above or to such other place as Tenant may from time to time designate in a written notice to Landlord. Notices and demands to Landlord shall be addressed to it at the address set forth above, or to such other firm or to such other place as Landlord may from time to time designate in a written notice to Tenant.