All communications under this Agreement will be in writing and will be given or made (and will be deemed to have been duly given or made upon receipt) by delivery in person, by courier service, by facsimile or by registered or certified mail (postage prepaid, return receipt requested) to the parties at the following addresses (or at such other address for a party as will be specified by like notice): Severability . If any term of this Agreement is held illegal or incapable of being enforced by any rule of law or public policy, all other terms of this Agreement will nevertheless remain in full force and effect so long as the economic or legal substance of the transactions contemplated by this Agreement is not affected in any manner materially adverse to any Party.