Cooperatives Act Article 27

A member may withdrew from the cooperative at the end of a business year, but shall submit a letter of application three months before.The term prescribed in the above paragraph may be prolonged to six months in the bylaw; if the member is a judicial person, the term may be prolonged to one year.
中文原文 合作社法第27條
社員得於年度終了時退社。
但應於三個月前提出請求書。
前項期間,得以章程延長至六個月,社員為法人時,得延長至一年。

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