council decis septemb conclus agreement form exchang letter european econom commun swiss confeder agricultur fisheri eec council european commun regard treati establish european econom commun articl thereof regard recommend commiss approv agreement form exchang letter european econom commun swiss confeder agricultur fisheri account access kingdom spain portugues republ commun decid articl agreement form exchang letter european econom commun swiss confeder agricultur fisheri approv behalf commun text exchang letter attach decis articl presid council author design person empow sign agreement purpos bind commun brussel septemb council presid how