Regulations Governing the Operation of Securities Introducing Broker Business by Futures Commission Merchants Article 7

The brokerage contract that the securities introducing broker enters into with a securities investor on behalf of a mandating securities firm shall expressly stipulate that the securities introducing broker is jointly and severally liable with the mandating securities firm for damages arising out of its execution of any business listed under the subparagraphs of Article 3 of these Regulations.
中文原文 期貨商經營證券交易輔助業務管理規則第7條
證券交易輔助人代理委任證券商與證券投資人簽訂之受託買賣契約中,應明定證券交易輔助人執行第三條各款業務所生之損害賠償責任,與委任證券商連帶負賠償責任。

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