Regulations Governing Book-Entry Operations for Centrally Deposited Securities Article 20

The securities deposited with a CSDE shall be held in fungible custody without distinguishing the ownership of participants or of customers, and it is only necessary upon their withdrawal that the securities being returned are of the same type and quantity.Ownership shares of the securities deposited in aggregate with a CSDE as referred to in the preceding paragraph shall be calculated separately according to the quantity of securities deposited by each participant or its customer(s).
中文原文 有價證券集中保管帳簿劃撥作業辦法第20條
送存保管事業之有價證券,不分參加人或客戶別混合保管之,並得以同種類同數量之有價證券返還。
前項經混合保管之有價證券,由參加人或其客戶按送存之數量分別共有。

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