Police Personnel Management Act Article 4

Police personnel are organized with distinct ranks. The ranks are protected, while positions may be transferred. Police personnel shall not be stripped of their ranks or relieved of their positions unless otherwise permitted by law.
中文原文 警察人員人事條例第4條
警察官、職分立,官受保障,職得調任,非依法不得免官或免職。

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