council decis june approv exchang letter european commun republ bulgaria amend interim agreement trade trade relat matter european econom commun european coal steel commun part republ bulgaria part europ agreement establish associ european commun member state part republ bulgaria part amend addit protocol sign decemb ec council european union regard treati establish european commun articl conjunct articl thereof regard europ agreement sign parti march amend addit protocol sign decemb regard interim agreement sign parti decemb amend addit protocol conclud decemb regard propos commiss interim agreement enter forc june interim agreement forc decemb interim agreement quantit concess carri year quota ceil grant bulgaria due late entri forc agreement effect commiss negoti behalf commun exchang letter amend interim agreement trade trade relat matter european econom commun european coal steel commun part republ bulgaria part amend addit protocol sign parti decemb amend europ agreement establish associ european commun member state part republ bulgaria part sign march amend addit protocol conclud parti decemb exchang letter approv decid articl exchang letter amend interim agreement trade trade relat matter european econom commun european coal steel commun part republ bulgaria part europ agreement european commun member state part republ bulgaria part approv behalf commun text exchang letter attach decis articl presid council author design person empow sign exchang letter behalf european commun presid council give notif behalf european commun procedur complet luxembourg june council presid simiti europ agreement publish offici journal oj oj