section 30 if a compensation event occurs. (2) The obligation to pay extraordinary contributions and make extraordinary payments shall only apply to CRR credit institutions that were already assigned to the statutory compensation scheme at the beginning of the contribution assessment year in which an extraordinary contribution or extraordinary payment is collected, and that still belonged to the statutory compensation scheme at the date on which the compensation event was determined. (3) The amount of the extraordinary contribution to be paid and the extraordinary payment to be made by the CRR credit institutions required to pay the contribution or make the payment under subsections (1) and (2) above shall in each case be measured by reference to the ratio of the most recent full annual contribution payable by the respective CRR credit institution to the aggregate amount of all the most recently payable full annual contributions and one-time payments in accordance with section 26 (2). In the case of CRR credit institutions that have not yet been required to pay an annual contribution, the most recent annual contribution payable shall be replaced by the one-time payment in accordance with section 26 (2). (4) The statutory compensation scheme shall be entitled to collect several extraordinary contributions and extraordinary payments as provided for in sections 29 and 30 in each contribution assessment year. However. in each contribution assessment year a statutory compensation scheme may only collect extraordinary contributions and extraordinary payments not exceeding 0.5% of the covered deposits of the CRR credit institutions assigned to that scheme. With BaFin's approval, a statutory compensation scheme may require payment of higher extraordinary contributions in exceptional circumstances to safeguard the proper functioning of the statutory compensation scheme. (5) With BaFin's approval, the statutory compensation scheme may defer, in whole or i