Nationality Act Article 17

A person who applies for restoring his/her nationality of the R.O.C. in accordance with Articles 15 and 16 shall apply with the Ministry of the Interior and shall have his/her nationality of the R.O.C. restored from the date of approval.
中文原文 國籍法第17條
依第十五條及第十六條申請回復中華民國國籍者,應向內政部為之,並自許可之日起回復中華民國國籍。

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