Hai cercato la traduzione di 撤回保留必须以书面提出 da Cinese semplificato a Inglese

撤回保留必须以书面提出。
the withdrawal of a reservation must be formulated in writing.

法律事务厅条约科在《秘书长作为多边条约保存人的实践摘要》的最新版本中指出： "撤回保留必须以书面提出，由三个公认权威人士之一签字，因为撤回保留通常会从实质上改变条约适用范围 "。
and in the summary of practice of the secretary-general as depositary of multilateral treaties the treaty section of the office of legal affairs states: "withdrawal must be made in writing and under the signature of one of the three recognized authorities, since such withdrawal shall normally result, in substance, in a modification of the scope of the application of the treaty. "

保留必须以书面形式提出。
a reservation must be formulated in writing.