The Organization Act for the National Taiwan Museum of Fine Arts Article 3

The Museum shall have one (1) Director, whose position shall be at the twelfth to thirteenth grade senior-level civil servant, and may be hired in the same manner as a principal or a professor of a junior college or higher if necessary; and one (1) Deputy-Director, whose position shall be at the eleventh grade senior-level civil servant, and may be hired in the same manner as an associate professor if necessary.
中文原文 國立臺灣美術館組織法第3條
本館置館長一人,職務列簡任第十二職等至第十三職等,必要時得比照專科以上學校校長或教授之資格聘任;副館長一人,職務列簡任第十一職等,必要時得比照副教授之資格聘任。

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