Regulations Governing Information to be Published in Order Tickets, Trade Reports, and Reconciliation Statements Prepared by Securities Brokers Upon Receiving Orders to Buy or Sell Securities Article 11

Order tickets, trade reports, and reconciliation statements shall be preserved for the periods specified in the Taiwan Stock Exchange Corporation Table of Preservation Periods for Accounts, Statements, Vouchers, and Certificates of Securities Firms.
中文原文 證券經紀商受託買賣有價證券製作委託書買賣報告書及對帳單應行記載事項準則第11條
委託書、買賣報告書及對帳單,其保存期限依臺灣證券交易所證券商帳表憑證保存年限表之規定辦理。

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