Regulations Governing the Conduct of Securities Trading Margin Purchase and Short Sale Operations by Securities Firms Article 17

A securities firm conducting margin purchase and short sale business shall mark to market on a daily basis the ratio of the value of collateral in each margin account to the customer's debt. If the ratio is lower than the required ratio, the securities firm shall immediately notify the customer to make up the difference within a prescribed time limit.The ratio and time limit for payment of the maintenance margin referred to in the preceding paragraph shall be prescribed by the stock exchange and OTC exchange and reported to the competent authority for approval.