Organization Act of the Ministry of National Defense Article 4

MND shall have one Minister (political appointment); two Vice Ministers (political appointment or General,Admiral ); and two Administrative Deputy Ministers at senior grade 14 or Lieutenant General(Vice Admiral).
中文原文 國防部組織法第4條
本部置部長一人,特任;副部長二人,特任或上將;常務次長二人,簡任第十四職等或中將。

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