council regul eec euratom decemb replac european unit account ecu commun legal instrument council european commun regard treati establish european econom commun articl thereof regard treati establish european atom energi commun articl thereof regard propos commiss regard opinion european parliament regul eec defin unit account ecu step standard unit account commun european unit account eua replac ecu commun legal instrument provis includ order eua replac ecu safeguard right oblig contract european unit account adopt decis articl commun legal instrument appli time entri forc regul quot european unit account quot replac quot ecu quot articl definit european unit account forc entri forc regul continu appli right oblig aris entri forc regul determin european unit account articl regul enter forc januari regul bind entireti directli applic member state brussel decemb council presid colett flesch oj oj oj