Regulations for the Review of Standardized Geographic Names and the Management of Geographic Names Article 12

The respective competent authorities shall update geographic name data when there is a change in a geographic name.
中文原文 標準地名審議及地名管理辦法第12條
地名有異動時,各級主管機關應即更新其地名資料。

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