Regulations Governing Futures Commission Merchants Article 30

Before accepting an order for futures trading, a futures commission merchant shall first enter into a brokerage contract with the principal.For a principal newly opening an account, the futures commission merchant shall carefully check the particulars to be filled in to see if there is any mistake or omission. Until an account has been opened, the futures commission merchant shall not accept any orders from the principal.
中文原文 期貨商管理規則第30條
期貨商於接受委託從事期貨交易前,應先與委託人簽訂受託契約。
期貨商對於新開戶之委託人,應就其填寫事項詳予核對有無錯誤遺漏,且非俟完成開戶手續,不得接受其委託。

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