Administrative Penalty Act Article 12

An act performed by a person in defense of his own rights or the rights of another against present unlawful infringement thereof is not punishable; provided that the penalty may be reduced or remitted even though such act of defense was excessive.
中文原文 行政罰法第12條
對於現在不法之侵害,而出於防衛自己或他人權利之行為,不予處罰。
但防衛行為過當者,得減輕或免除其處罰。

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