Regulations on Safeguarding Civil Aviation Against Acts of Unlawful Interference Article 24

If the owner or operator of an aircraft, based upon sufficient evidence, believes that the aircraft may be a subject of an act of unlawful interference, it shall then follow the contingency plan set forth under its aviation security program, and shall forthwith notify the APB; and if the aircraft has departed, it shall also forthwith notify the airports concerned and the air traffic control unit.
中文原文 民用航空保安管理辦法第24條
航空器所有人或使用人有足夠證據顯示航空器可能為非法干擾行為之目標時,應依其航空保安計畫所訂之緊急應變計畫處理,並即通知航警局;如航空器已起飛,另應即通報相關航空站及飛航管制單位。

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