council resolut march convent prevent marin pollut land base sourc council european commun regard treati establish european econom commun regard draft resolut submit commiss interest member state commun effect measur quickli protect sea pollut includ pollut land base sourc council decis eec march conclud convent prevent marin pollut land base sourc invit member state affect convent prevent marin pollut land base sourc sign convent case consid advis ensur coher implement undertak enter convent result european convent protect intern watercours pollut drawn council europ gener commit aris carri programm action commun environ endeavour examin propos decis reduct pollut caus danger substanc discharg aquat environ commun view take decis june oj