All notices, requests, claims, demands and other communications hereunder shall be in writing and shall be given or made (and shall be deemed to have been duly given or made upon receipt) by delivery in person, by courier service, by telecopy or by registered or certified mail (postage prepaid, return receipt requested) to the respective parties at their addresses set forth in the preamble to this Agreement (or at such other address for a party as shall be specified in a notice given in accordance with this Section 11.4).