18.6.6 Failure by Customers to Pay Premium

If a customer fails to make payment of the Premiums payable to a Trading Member despite being requested to do so by the Trading Member, then the Trading Member shall be entitled to enter into a closing purchase or written transaction as the case may be, in respect of the same Option for which the Premiums were due, charging any loss arising therefrom (including commissions and other costs) to the defaulting customer.