When securities brokers accept trading orders, they shall undertake the trades in accordance with the particulars of the order tickets and in the order of their serial numbers.
A principal or principal's agent may give written notice to the securities broker to cancel the trading order or reduce the volume of the trade, except where the trade has already been confirmed.
A securities broker of a securities firm may accept the authorization by a juristic person or other institution of the securities firm to decide on the price (within the price fluctuation range designated by the juristic person or institution) and time of order submission, and the securities firm is required to retain a record of the customer's authorization and trading order.
A securities broker may accept an order specifying the period of validity.
For trade orders accepted by securities brokers through the Internet or other electronic means of transaction, the period of validity shall be specified; for orders made over the Internet, the period of validity shall be displayed on the electronic interface where trading order information is entered.