Regulations Governing the Use of Weapons in Prisons and Detention Centers Article 6

The Officer shall give prior warning before use of weapon, unless there is an emergency.When the reason for use of weapon ceases to exist, the use shall stop immediately.
中文原文 監獄及看守所器械使用辦法第6條
機關人員使用器械應事先警告。
但情況急迫者,不在此限。
使用器械原因已消滅者,應即停止使用。

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