If any provision of this Contract and/or an Order is held invalid, illegal or unenforceable for any reason, such provision shall be ineffective and the remainder of the provisions hereof shall continue in full force and effect as if this Contract and/or an Order had been concluded without the ineffective provision. In this case, the Parties shall negotiate in order to replace the said provision with a valid stipulation that as closely as possible reaches the economic purpose of the said provision. This applies also in case of a missing provision.