Organization Act of Diplomatic Missions of the Republic of China (Taiwan) Article 3

The competent authority for this Act shall be MOFA.The establishment, adjustment, abolishment, and area of jurisdiction of diplomatic missions shall be submitted by MOFA to the Executive Yuan for approval.
中文原文 駐外機構組織通則第3條
本通則之主管機關為外交部。
駐外機構之設立、調整、裁撤及其轄區之劃分,由外交部報請行政院核定。

English translation for reference only; the Chinese text prevails. Not legal advice.