(11)To enable the operability of the register of information at entity, sub-consolidated and consolidated level across all the financial entities that are part of the same group, financial entities should ensure the correctness and consistency of all the data in that register. In particular, to enable such operability, it is necessary to ensure consistency in the consolidation of the identifiers, namely the contractual arrangement reference numbers, the function identifier, LEI of the financial entities and identifiers of the ICT third-party service providers.