Aircraft Flight Operation Regulations Article 201-4

No person may serve as Director of Maintenance unless he/she is familiar with the maintenance part of the operator’s manual and operations specifications, the applicable maintenance rules and regulations and1. Either holds or has held a valid aircraft maintenance engineer certificate and mechanical related experience for at least 3 years; or2. Has an experience in the maintenance on civil aircraft for 5 years or more, and at least one year of which was in a supervisory capacity.
中文原文 航空器飛航作業管理規則第201-4條
機務主管除應熟悉與其業務相關各類手冊、普通航空業維護作業、營運規範及相關民航法規適用之維護規定外,並應具備下列條件之一:
一、持有或曾持有航空器維修工程師檢定證並具有機務相關工作三年以上之經驗。
二、民用航空器五年以上之維護經驗,且其中一年以上曾擔任管理職之經驗。

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