(44)With regard to other entities involved in the reconciliation process, several scenarios should be distinguished depending on the role of those entities. The reconciliation measures should reflect the specific roles of those entities. According to the registrar model, the registrar maintains records of securities which are also recorded in a CSD. According to the transfer agent model, the fund manager or transfer agent is responsible for an account that maintains a part of a securities issue recorded in a CSD. According to the common depository model, the common depository is used by CSDs that establish an interoperable link and the common depository should be responsible for the overall integrity of the securities issues initially recorded or centrally maintained by the CSDs that have established an interoperable link.