council decis februari conclus behalf commun convent protect marin environ baltic sea area helsinki convent revis ec council european union regard treati establish european commun articl conjunct articl subparagraph thereof regard propos commiss regard opinion european parliament regard opinion econom social committe commiss behalf commun part negoti draft helsinki convent revis convent sign behalf commun septemb convent establish framework region cooper ensur ecolog rehabilit baltic sea view regener marin environ preserv ecolog balanc commun adopt measur area cover convent act intern level area commun polici environ contribut pursuit object preserv protect improv qualiti environ protect human health prudent ration util natur resourc commun polici environ aim high level protect base precautionari principl principl prevent action environment damag prioriti recitfi sourc pollut pai framework respect respons commun member state cooper countri compet intern organ conclus convent commun attain object set articl treati decid articl convent protect marin environ baltic sea area helsinki convent revis sign helsinki finland septemb approv behalf european commun text convent attach decis articl presid council deposit instrument approv finnish govern accord articl convent brussel februari council presid pangalo oj oj oj