Regulations Governing Water Recreation Activities Article 17

Those engaging in scuba diving or free diving activities shall possess a relevant certificate issued by a domestic or foreign diving organization for the respective diving activities.
中文原文 水域遊憩活動管理辦法第17條
從事水肺潛水或自由潛水活動者,應具有國內或國外潛水機構發給該潛水活動相對之能力證明。

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