council decis april conclus agreement european commun republ korea cooper mutual administr assist custom matter ec council european union regard treati establish european commun articl thereof conjunct sentenc articl thereof regard propos commiss april council author commiss negoti behalf commun custom cooper agreement commun main trade partner agreement european commun republ korea cooper mutual administr assist custom matter approv decid articl agreement european commun republ korea cooper mutual administr assist custom matter approv behalf commun text agreement attach decis articl commiss assist repres member state repres commun joint custom cooper committe set pursuant articl agreement articl presid council author design person empow sign agreement behalf commun articl presid council effect notif provid articl agreement behalf commun articl decis publish offici journal european commun brussel april council presid kenni