council regul ec decemb convers rate euro currenc member state adopt euro council european union regard treati establish european commun articl sentenc thereof regard propos commiss regard opinion european central bank articl treati stage econom monetari union start januari council meet composit head state govern confirm belgium germani spain franc ireland itali luxembourg netherland austria portug finland fulfil condit adopt singl currenc januari council regul ec introduct euro euro currenc member state adopt singl currenc januari introduct euro requir adopt convers rate euro substitut nation currenc rate euro divid nation currenc unit convers rate articl convers rate refer indent articl regul ec council regul ec june provis relat introduct euro refer ecu legal instrument replac refer euro rate euro ecu articl sentenc treati adopt convers rate modifi extern ecu ensur adopt convers rate exchang rate ecu currenc member state adopt euro calcul commiss decemb establish procedur calcul daili offici ecu rate minist member state adopt euro singl currenc governor central bank member state commiss european monetari institut european central bank issu communiqué determin adopt irrevoc convers rate euro date septemb regul ec stipul convers rate adopt euro express term nation currenc member state adopt euro order ensur high degre accuraci rate adopt signific figur invers rate bilater rate currenc member state adopt euro defin adopt regul articl irrevoc fix convers rate euro currenc member state adopt euro euro belgian franc german mark spanish peseta french franc irish pound italian lire luxembourg franc dutch guilder austrian schill portugues escudo finnish mark articl regul enter forc januari regul bind entireti directli applic member state brussel decemb council presid edling oj council decis ec accord articl treati oj oj oj oj