All notices, requests and demands hereunder shall be in writing and deemed to have been given or made: if delivered in person, immediately upon delivery; if by email, telex, telegram or facsimile transmission, immediately upon sending and upon confirmation of receipt; if by nationally recognized overnight courier service with instructions to deliver the next business day, one (1) business day after sending; and if by certified mail, return receipt requested, five (5) business days after mailing. All notices, requests and demands upon the Parties are to be given to the following addresses (or to such other address as any party may designate by notice in accordance with this Section 51.