Act Governing Relations between the People of the Taiwan Area and the Mainland Area Article 31
In the event that any civil aircraft of the Mainland enters, without permission, into the controlled airspace of the Taipei Flight Information Region, the authorities in charge of air defense may warn the aircraft to turn away or take any necessary defensive action.
中文原文 臺灣地區與大陸地區人民關係條例第31條
大陸民用航空器未經許可進入臺北飛航情報區限制進入之區域，執行空防任務機關得警告飛離或採必要之防衛處置。