commiss regul eec octob statist threshold extern trade statist commun statist trade member state commiss european commun regard treati establish european econom commun regard council regul eec june extern trade statist commun statist trade member state amend regul eec articl thereof council regul eec decemb enter forc fix statist threshold european unit account eua convert nation currenc rate convers currenc relat eua vari dai dai determin statist threshold applic fix rate convers requir rate base averag exchang rate period januari decemb interest simplif amount obtain round measur provid regul accord opinion committe extern trade statist adopt regul articl statist threshold mean articl regul eec express nation currenc exce gt pic file quot quot gt articl regul enter forc dai public offici journal european commun regul bind entireti directli applic member state brussel octob commiss françoi xavier ortoli vice presid oj oj