Regulations Governing the Administration of Shareholder Services of Public Companies Article 35

Where a shareholder processes matters in accordance with Articles 23 to 28, and such shareholder is a minor or a person under guardianship or assistance, for the shares being transferred, the statutory agent, guardian, or assistant shall affix his or her signature or chop on the stock certificate and the transfer application.
中文原文 公開發行股票公司股務處理準則第35條
依第二十三條至第二十八條辦理過戶之股東,若屬未成年、受監護或輔助宣告者,其股份之出讓,並應由法定代理人、監護人或輔助人於股票及過戶申請書上簽名或蓋章。

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