council decis novemb conclus convent cooper protect sustain river danub ec council european union regard treati establish european commun articl conjunct articl sentenc paragraph thereof regard propos commiss regard opinion european parliament regard opinion econom social committe commiss particip behalf commun negoti ad hoc work parti prepar convent cooper protect sustain river danub convent sign behalf commun sofia bulgaria june convent set establish framework bilater multilater cooper protect marin environ prevent control pollut river danub ensur sustain water resourc countri river danub flow commun adopt measur field cover convent commun make intern commit area accord articl commun polici environ help pursu object preserv protect improv qualiti environ protect human health prudent ration util natur resourc view sustain develop promot intern level measur deal region worldwid environment problem commun environment polici aim high level protect base principl precautionari prevent action principl rectifi prioriti sourc environment damag pollut pai principl part respect compet commun member state cooper respect countri intern organ conclus convent commun achiev object set articl treati approv decid articl convent cooper protect sustain river danub approv behalf commun text convent attach decis articl presid council author design person person empow deposit instrument approv romanian govern accord articl convent brussel novemb council presid hennicot schoepg oj opinion deliv octob oj oj