This Agreement may not be changed or altered, except by a writing signed by both Parties. Until such time as this Agreement has been executed and subscribed by both Parties hereto: its terms and conditions and any discussions relating thereto, without any exception whatsoever, shall not be binding nor enforceable for any purpose upon any party.  This Agreement constitutes an integrated, written contract, expressing the entire agreement and understanding between the Parties with respect to the subject matter hereof and supersedes any and all prior agreements and understandings, oral or written, between the Parties.