The Agreement, as amended by this Amendment, constitutes the full and complete agreement and understanding between the parties hereto and shall supercede all prior communications, representations, understandings or agreements, if any, whether oral or written, concerning the subject matter contained in the Agreement, as so amended, and no provision of the Agreement, as so amended, may be modified, amended, waived or discharged, in whole or in party, except by a written instrument executed by all of the parties hereto.