Organization Act of Diplomatic Missions of the Republic of China (Taiwan) Article 7
MOFA may grant diplomats appropriate nominal titles and ranks depending on operational needs.
中文原文 駐外機構組織通則第7條
外交部得應業務需要，給予駐外人員適當名義對外或予以加銜。
English translation for reference only; the Chinese text prevails. Not legal advice.