(4)In order to ensure that input data is appropriate and verifiable, the administrator should be required to monitor input data on a regular basis, to a degree that reflects the vulnerability of the particular input data type. In the case of regulated data, existing regulation and supervision of the relevant data provider already ensure the integrity of regulated data. That type of data should therefore be subject to less extensive monitoring requirements. Other types of input data require more verification and should be subject to more extensive checks, notably input data that is not transaction data and especially if it is contributed from a front-office function.