(4)Securitisation repositories may provide services, referred to as ‘ancillary securitisation services’, which are directly related to and arise from the delivery of services for which registration as a securitisation repository is required under Regulation (EU) 2017/2402 (referred to as ‘core securitisation services’). For example, securitisation repositories may provide research or consultancy services to a prospective securitisation issuer which make use of the securitisation data available to the securitisation repository. Securitisation repositories may also provide ancillary services that are neither directly related to, nor arise from the delivery of core securitisation services (ancillary non-securitisation services). However, the use of common resources within a securitisation repository for the provision of both core securitisation services and ancillary securitisation services, or indeed ancillary non-securitisation services, could lead to contagion of operational risks across those services. Services involving the validation, reconciliation, processing or record-keeping of information may therefore require an effective means of operational separation in order to avoid such contagion. On the other hand, practices such as common front-end systems, a common access point to information or use of the same staff working in sales, compliance or a client services helpdesk may be considered less prone to contagion and hence will not necessarily require operational separation. Applicants for registration as a securitisation repository should therefore be required to demonstrate that they have established an appropriate level of operational separation between the resources, systems and procedures used in those business lines that are involved in the provision of core securitisation services and the resources, systems and procedures used in other business lines involved in the provision of ancillary services, regardless of whether those other business lines are run by the securitisation repository, an affiliated entity, or another entity.