(87)To ensure that critical ICT third-party service providers are appropriately and effectively overseen on a Union level, this Regulation provides that any of the three ESAs could be designated as a Lead Overseer. The individual assignment of a critical ICT third-party service provider to one of the three ESAs should result from an assessment of the preponderance of financial entities operating in the financial sectors for which that ESA has responsibilities. This approach should lead to a balanced allocation of tasks and responsibilities between the three ESAs, in the context of exercising the oversight functions, and should make the best use of the human resources and technical expertise available in each of the three ESAs.