This Agreement may be executed in counterparts, each of which shall be binding as of the date first written above, and all of which shall constitute one and the same instrument. Each such counterpart shall be deemed an original, and it shall not be necessary in making proof of this Agreement to produce or account for more than one such counterpart. The exchange of copies of this Agreement and of signature pages by facsimile transmission, portable document format (.pdf) or other electronic format shall be deemed to be their original signatures for all purposes. This Agreement shall not become effective until one or more counterparts have been executed by each Party and delivered to the other Parties.