guidelin european central bank april authoris issu nation banknot transit period ecb np govern council european central bank regard treati establish european commun hereinaft refer quot treati quot articl thereof statut european system central bank european central bank hereinaft refer quot statut quot articl thereof european central bank ecb exclus authoris issu banknot commun januari light articl council regul ec introduct euro banknot denomin nation currenc unit subdivis euro januari aforement provis entail authoris issu nation banknot transit period defin sixth indent articl council regul ec belong ecb januari issuanc banknot demand driven process regard nation banknot nation central bank transit period good posit assess volum issu govern council ecb decid begin authoris issu euro banknot accord articl statut ecb guidelin form integr part commun law adopt guidelin articl authoris issu nation banknot nation central bank authoris continu issu nation banknot transit period nation practic nation central bank inform ecb end februari year amount nation banknot issu preced year articl final provis guidelin address nation central bank particip member state frankfurt main april behalf govern council ecb willem duisenberg oj