Hence the ability of the Eurosystem to act in the (unlikely) event of a crisis imperilling the system is assured. There are in the meantime clear agreements to this effect within the Eurosystem. Under these agreements, should the need actually arise, the diverse national arrangements would be applied first.
But it goes without saying that the Eurosystem would be involved as well if liquidity effects on a scale relevant to monetary policy were felt. In the shape of the ECB Governing Council and Executive Board, the Eurosystem has decision-making bodies which - if need be - can take the requisite decisions swiftly. More cannot be said and more should not be said.