(9)Members, participants or clients having signed a market making agreement have to meet a minimum set of requirements in terms of presence, size and spread in all cases. However, the members, participants or clients meeting those minimum requirements only under normal trading conditions may not necessarily access any type of incentive. Trading venues may establish market making schemes which only reward members, participants or clients meeting more stringent parameters in terms of presence, size and spread. The market making schemes put in place by trading venues should therefore clearly indicate the conditions for accessing incentives and should take into account the effective contribution to the liquidity in the trading venue measured in terms of presence, size and spread by the participants in the schemes.