Regulations Governing the Operation of Futures Introducing Broker Business by Securities Firms Article 21

A futures introducing broker shall not open an account with a futures commission merchant to engage in futures trading on account of its own interests; provided that this provision shall not apply if a securities firm has applied for concurrent operation of futures proprietary business pursuant to the relevant provisions of the Standards Governing the Establishment of Futures Commission Merchants.
中文原文 證券商經營期貨交易輔助業務管理規則第21條
期貨交易輔助人不得於期貨商開戶,為自己利益之計算從事期貨交易。
但證券商依期貨商設置標準有關之規定,申請兼營期貨自營業務者,不在此限。

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