Nationality Act Article 4

A foreign national or stateless person who currently has a domicile within the territory of the R.O.C., meets the conditions prescribed in Subparagraphs 2 to 5 of Paragraph 1 of Article 3, and has legally resided within the territory of the R.O.C. for more than 183 days each year for at least three consecutive years may apply for naturalization if any of the following circumstances apply:1. If married to an R.O.C. national, he/she is not required to meet the conditions prescribed in Subparagraph 4 of Paragraph 1 of Article 3.2. He/she has divorced an R.O.C. national due to domestic violence and has not since remarried, or his/her R.O.C. national spouse has died and he/she has not remarried. He/she demonstrate that he/she remains in contact with family members of their deceased spouse. However, those who had been married to an R.O.C. national for at least two years before the spouse’s death are exempted from the requirement concerning contact with family members.3. He/she supports his/her children who possess R.O.C. nationality and are legally incompetent or have limited legal competence, exercises rights and obligations on behalf of such children, and meets and interacts with them in person.4. He/she has at least one parent who is or was an R.O.C. national.5. An R.O.C. national has adopted him/her.6. He/she was born in the territory of the R.O.C.7. He/she is the guardian or assistant of an R.O.C. national.A foreign national or stateless person who is an unmarried minor, has legally resided in the territory of the R.O.C. for less than three years, and does not meet the conditions prescribed in Subparagraphs 2, 4, and 5 of Paragraph 1 of Article 3 may apply for naturalization if any of the following circumstances apply:1. His/her (adoptive) father or (adoptive) mother is an R.O.C. national.2. He/she is currently under the guardianship of a social welfare authority or social welfare institution.
中文原文 國籍法第4條
外國人或無國籍人,現於中華民國領域內有住所,具備前條第一項第二款至第五款要件,於中華民國領域內,每年合計有一百八十三日以上合法居留之事實繼續三年以上,並有下列各款情形之一者,亦得申請歸化:
一、為中華民國國民之配偶,不須符合前條第一項第四款。
二、為中華民國國民配偶,因受家庭暴力離婚且未再婚;或其配偶死亡後未再婚且有事實足認與其亡故配偶之親屬仍有往來,但與其亡故配偶婚姻關係已存續二年以上者,不受與親屬仍有往來之限制。
三、對無行為能力、或限制行為能力之中華民國國籍子女,有扶養事實、行使負擔權利義務或會面交往。
四、父或母現為或曾為中華民國國民。
五、為中華民國國民之養子女。
六、出生於中華民國領域內。
七、為中華民國國民之監護人或輔助人。
未婚且未滿十八歲之外國人或無國籍人,有下列情形之一者,在中華民國領域內合法居留雖未滿三年且未具備前條第一項第二款、第四款及第五款要件,亦得申請歸化:
一、父、母、養父或養母現為中華民國國民。
二、現由社會福利主管機關或社會福利機構監護。

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