Unless we inform you that Orders can only be given in a particular way or unless you are a holder of a self-service Account, you may give us Orders via the System or orally, by telephone to a Dealer during the trading hours which are available on our Website or as the case may be, where the market(s) for the Instruments are open for trading. If you are a holder of a self-service Account, you must place Orders via the System only, unless the System is unavailable, in which case, you may place Orders by telephone during the trading hours which are available on our Website or as the case may be, where the market(s) for the Instruments are open for trading