Regulations Governing Visiting, Residency, and Permanent Residency of Aliens Article 12

An Alien Resident Certificate issued to any of the following foreign nationals shall be valid for no more than one year:1. Any person who is studying languages at a Chinese language center affiliated with a college or university or is studying Chinese at a tutoring center.2. Any person who is studying or undergoing training in the ROC with approval from the competent authority for education or any other relevant competent authority.3. A foreign missionary or Buddhist preacher.4. A first-time applicant for family-based residency who is married to a ROC national residing in the Taiwan Area with a registered household.5. Any other person requiring residency.The Alien Resident Certificate of any applicant whose application for an extension of residency under the preceding paragraph has been approved shall be extended for 3 years from the day following the date of expiration of the original duration of residency. If necessary, he/she may apply for another extension of residency not exceeding 3 years.
中文原文 外國人停留居留及永久居留辦法第12條
下列外國人之外僑居留證,其有效期間最長不得逾一年:
一、在大專校院附設之華語文中心學習語文或在短期補習班研習華語之人員。
二、經教育或其他有關主管機關核准,在我國研習、受訓之人員。
三、外籍傳教及弘法人士。
四、與現在在臺灣地區居住且設有戶籍國民結婚,初次申請依親居留者。
五、其他有居留需要之人員。
第九條第二項外國人申請延期居留經許可核發之外僑居留證,其有效期間自原居留期限屆滿之翌日起延期三年,必要時,得再申請延期居留一次,期間不得逾三年。

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