This Agreement may be executed in any number of counterparts (and by different parties hereto in different counterparts), each of which where so executed and delivered shall constitute an original, but all of which when taken together shall constitute a single contract. It shall not be necessary in making proof of this Agreement to produce or account for more than one such counterpart. Delivery of an executed counterpart of a signature page of this Agreement by telecopy or other electronic imaging means shall be effective as delivery of a manually executed counterpart of this Agreement.