guidelin european central bank novemb implement articl statut european system central bank european central bank ecb np govern council european central bank regard treati establish european commun hereinaft refer quot treati quot articl thereof articl statut european system central bank european central bank hereinaft refer quot statut quot euro currenc particip member state januari articl treati requir eu council adopt convers rate currenc member state derog irrevoc fix irrevoc fix rate euro substitut currenc nation currenc unit unit euro convers rate articl statut empow govern council european central bank ecb measur ensur banknot denomin currenc irrevoc fix exchang rate exchang nation central bank ncb respect par valu object articl statut ensur high degre substitut nation currenc unit adopt convers rate refer articl treati end govern council ecb ensur ncb readi exchang convers rate legal tender banknot issu ncb member state derog banknot articl statut effect end transit period defin sixth indent articl council regul ec introduct euro transit period end transit period exchang banknot particip member state address conjunct cash changeov euro nation central bank ensur banknot particip member state exchang nation banknot coin nation legisl credit account ncb ensur exchang banknot particip member state nation banknot coin perform par ncb oblig provid servic appoint agent perform servic behalf accord articl statut ecb guidelin form integr part commun law adopt guidelin articl definit purpos ecb guidelin quot banknot particip member state quot banknot issu ncb present ncb appoint agent exchang quot exchang banknot particip member state quot exchang legal tender banknot issu ncb present ncb appoint agent exchang nation banknot coin credit fund account quot ncb quot nation central bank member state adopt singl currenc accord treati quot par quot result convers rate adopt eu council articl treati spread quot bui sell rate quot quot particip member state quot member state adopt singl currenc accord treati quot transit period quot period start januari end decemb articl oblig exchang par ncb locat nation territori appoint agent ensur banknot particip member state exchang nation banknot coin request credit account institut effect exchang nation legisl provid possibl case respect par ncb limit number total banknot particip member state prepar accept transact dai articl banknot qualifi exchang banknot particip member state qualifi exchang ecb guidelin badli mutil consist part banknot join damag anti theft equip articl report execut board ecb report govern council ecb implement ecb guidelin year juli time articl final provis ecb guidelin effect start date transit period ncb commun ecb mean intend compli ecb guidelin decemb ecb guidelin appli banknot particip member state present exchang articl statut end transit period guidelin address nation central bank particip member state frankfurt main novemb behalf govern council ecb willem duisenberg oj