council decis march conclus convent intern commiss protect oder ec council european union regard treati establish european commun articl thereof conjunct sentenc articl subparagraph articl thereof regard propos commiss regard opinion european parliament commiss particip behalf commun negoti prepar convent intern commiss protect oder convent sign behalf commun wroclaw poland april convent aim strengthen multilater cooper prevent control pollut oder protect environ ensur sustain water resourc overrid aim commun polici field environ high level protect base principl precautionari measur prevent action principl rectifi environment damag prefer sourc quot pollut pai quot principl respect sphere compet commun member state cooper countri compet intern organis conclus convent commun contribut pursuit object laid articl treati decid articl convent intern commiss protect oder approv behalf commun text convent attach decis articl presid council authoris design person person empow deposit instrument approv gener secretariat council accord articl convent brussel march council presid müntefer oj opinion deliv decemb publish offici journal