Mining Safety Act Article 18

The Mineral Rights Holder must receive permission from the Governing Agency before abandoning a mine pit and should take every necessary safety precaution when doing so.
中文原文 礦場安全法第18條
礦業權者在廢棄礦坑前,應報主管機關核准,並採取各項必要之安全措施。

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