Organization Act of the National Taiwan Library Article 3

The NTL shall appoint one Director at senior grade 12 and if necessary, based on qualifications equivalent to or higher than that of the president of a junior college.
中文原文 國立臺灣圖書館組織法第3條
本館置館長一人,職務列簡任第十二職等,必要時得比照專科學校校長以上資格聘任。

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