It is to be built up over time and funded by bank levies. The exact structure of this bank levy is currently being negotiated. Regardless of the details, it is particularly important in my view that the bank levy is as clear and simple to calculate as possible and does not allow for any exceptions.
To ensure that liability and control are kept in balance, banks that are subject to European supervision also need to be resolved at the European level. But this also means that losses originating from the time before the launch of the banking union need to be remedied under national responsibility.