4.5 Duty to trade on the Exchange
1 The Exchange may provide for a duty to trade on the Exchange in individual market segments. This duty obliges the participant, during trading hours, to execute orders on order book only.
2 Provisions on "best execution", which oblige the participant to execute trades to its best ability (best execution) take precedence over any duty to trade on the Exchange.
3 The details are laid down in the "Trading" Directive.