Organization Act of the Ministry of Foreign Affairs, Executive Yuan Article 3

MOFA shall have one Minister (political appointment); two Deputy Ministers (political appointment) equivalent to senior grade 14; and one Vice Minister (career diplomat) at senior grade 14.
中文原文 外交部組織法第3條
本部置部長一人,特任;政務次長二人,職務比照簡任第十四職等;常務次長一人,職務列簡任第十四職等。

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