commiss decis januari deleg signatur ecsc eec euratom commiss european commun regard treati establish singl council singl commiss european commun regard provision rule procedur commiss juli amend decis januari provision measur exercis power previous deleg commiss european commun member decid articl respons invest member commiss european commun deleg power respons made exercis provision presid commiss deleg commiss member provis appli decis commiss april confer respons administr measur framework common organ agricultur market amend decis commiss march articl decis enter forc januari brussel januari commiss presid françoi xavier ortoli oj offici journal oj oj