declar organ prior consult member state event alter exchang pariti currenc eec repres govern member state european econom commun meet council articl treati establish european econom commun lai member state treat polici regard rate exchang matter common concern desir chang exchang pariti currenc member state preced consult member state advis monetari committe give opinion mean hold consult condit account natur decis made pariti consequ affect achiev function common market commiss part consult declar govern member state consult make alter exchang pariti currenc member state channel monetari committe deliv opinion commiss part consult brussel