The Compulsory Enforcement Act Article 102

In conducting the first auction of a share in a co-owned property, the enforcement court shall notify other co-owners, except when the notification is not available.The floor price for the auction shall be determined in proportion to the value of the whole co-owned property based on the debtor's share.
中文原文 強制執行法第102條
共有物應有部分第一次之拍賣,執行法院應通知他共有人。
但無法通知時,不在此限。
最低拍賣價額,就共有物全部估價,按債務人應有部分比例定之。

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