(34)It is important that CCPs apply a consistent methodology for the calculation of the own resources to be used in the default waterfall, in order to ensure equivalent conditions field between CCPs. Allowing CCPs discretion to implement a methodology that is insufficiently clear would lead to very different results among CCPs, thus providing incentives for regulatory arbitrage. It is therefore essential that the methodology does not allow for discretion to CCPs. For this purpose, it would be appropriate to have a simple percentage based on a clearly identifiable measure and a clear methodology for ensuring a consistent calculation of CCPs’ own resources to be used in a default waterfall.