council decis april conclus agreement form agre minut european econom commun australia relat agricultur product negoti articl xxviii gatt eec council european commun regard treati establish european econom commun articl thereof regard propos commiss australia pursuant articl xxviii gener agreement tariff trade gatt made intent modifi withdraw tariff concess agricultur product commun main supplier initi negoti right commiss conduct negoti australia articl xxviii gatt satisfactori agreement reach agreement approv decid articl agreement form agre minut european econom commun australia relat agricultur product negoti articl xxviii gatt approv behalf commun text agreement attach decis articl presid council notifi australia approv laid agreement luxembourg april council presid poo