(6)The ECB’s shift from an ex ante fee issuance system to an ex post fee issuance system has resulted in a gap in the transmission of data from the ECB to the Board for the period from December 2019 to June 2021. To ensure that the Board is able to raise the resources to cover its administrative expenditures for 2021 with the data that are available to it at the beginning of that year, transitional arrangements are necessary for the financial year 2021. To reflect the situation of the contributing entities closer to financial year 2021, however, the Board should recalculate those contributions in 2022 on the basis of more recent data that will have become available to it in the meantime. The difference between the amount of the individual annual contribution due for the financial year 2021 as recalculated in year 2022 and the amount of that contribution as calculated in year 2021 should be added or subtracted, respectively, from the amount of the individual annual contribution due for the financial year 2022.