(5)To determine the systemic character and importance of the financial entities relying on the ICT services, it is necessary to take into account the nature of those financial entities. Where financial entities that are classified as G-SIIs and O-SIIs or that are identified as ‘systemic’ rely on the same ICT services to support their critical or important functions, it is appropriate to assess whether the ICT third-party service provider providing those services should be considered as critical for the Union financial sector. The interconnectedness between financial entities within the Union financial sector that rely on ICT services provided by the same ICT third-party service provider should also be assessed to determine the reliance of financial entities on that ICT third-party service provider.