All notices, demands and communications hereunder shall be in writing and shall be by messenger or overnight air courier, facsimile transmission, e-mail or United States mail and shall be deemed to have been given when delivered (or, if such day is not a business day, the next occurring business day) by messenger or overnight air courier, upon completion of facsimile transmission or e-mail (with, in each case, electronic confirmation of receipt) or two business days after deposit in the United States mail, registered or certified, with postage prepaid, addressed to the parties at the addresses set forth on the signature page hereof, or at such other address as any party shall have furnished to the other parties in writing in accordance with the requirements of this Section 11.