No modification of this Guaranty shall be effective for any purpose unless it is in writing and executed by an officer of Buyer authorized to do so.
非经书面并由一名经授权的买方工作人员执行，为任何目的对本担保书所作的变更均无效。
This MOU shall be amended by mutual agreement in writing and duly executed by the Parties.
备忘录应由各方合意以书面形式作出修改并依约履行。
This Contract shall not be modified, amended or supplemented except by and instrument in writing duly executed by Seller and Buyer.
本合同不应进行任何修正、修改或是补充，除非经由买方和卖方的书面适当授权。
Any and all modifications of this Agreement shall be made in writing and must be executed by all parties as a condition precedent to implementation of such a modification.
对本协定的任何修改均要采取书面形式作为先决条件，修改后的条款各方都必须要遵守和实行。
No modification of this Guaranty shall be effective for any purpose unless it is in writing a nd executed by an officer of Buyer authorized to do so.
非经书面并由一名经授权的买方工作人员执行，为任何目的对本担保书所作的变更均无效。
This contract represents the entire agreement between the parties and any change will be made in writing, executed by both parties.
这份合同也通过双方的一致认可，合同条款如有变动，也有双方执行。
Article 3 the partnership agreement shall be executed in writing in accordance with the law by all the partners upon their agreement after consultation.
第四十四条新合伙人入伙时，应当经全体合伙人同意，并依法订立书面入伙协议。
Article 3 the partnership agreement shall be executed in writing in accordance with the law by all the partners upon their agreement after consultation.
第四十四条新合伙人入伙时，应当经全体合伙人同意，并依法订立书面入伙协议。
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