All notices, requests and demands to or upon the respective parties hereto to be effective shall be in writing (including by facsimile transmission), and, unless otherwise expressly provided herein, shall be deemed to have been duly given or made when delivered: (a) by hand, upon receipt or (b) three days after being deposited in the mail, postage prepaid, or (c) in the case of a facsimile transmission notice, when received (with confirmation of receipt), or (d) in the case of delivery by a nationally recognized overnight courier, when received, in each case addressed to such addresses or fax number as may be hereafter notified by the respective parties hereto.