council decis april conclus agreement form exchang letter fish amend interim agreement trade trade relat matter european econom commun european coal steel commun part czech slovak feder republ part europ agreement establish associ european commun member state part czech republ part ec council european union regard treati establish european commun articl conjuct articl thereof regard propos commiss desir amend mean agreement form exchang letter czech republ interim agreement trade trade relat matter european econom commun european coal steel commun part czech slovak feder republ part europ agreement establish associ european commun member state part czech republ part provid duti free quota import commun live trout carp origin czech republ import czech republ frozen mackerel origin commun decid articl agreement form exchang letter european commun czech republ fish amend articl interim agreement trade trade relat matter european econom commun european coal steel commun part czech slovak feder republ part articl europ agreement establish associ european commun member state part czech republ part ad annex xva annex xvb agreement approv behalf european commun text agreement attach decis articl presid council author design person empow sign agreement order bind commun luxembourg april council presid constantin oj