Any and all notices, requests, demands and other communications required or otherwise contemplated to be made under this Agreement shall be in writing and shall be provided by one or more of the following means and shall be deemed to have been duly given (a) if delivered personally, when received, (b) if transmitted by facsimile, on the date of transmission with receipt of a transmittal confirmation, or (c) if by an internationally recognized overnight courier service, one Business Day after deposit with such courier service. All such notices, requests, demands and other communications shall be addressed to such address or facsimile number as a party may have specified to the other parties in writing delivered in accordance with this Section 6.4.