council decis novemb conclus behalf commun convent protect rhine ec council european union regard treati establish european commun articl sentenc subparagraph articl subparagraph articl regard propos commiss regard opinion european parliament decis eec commun conclud convent protect rhine chemic pollut addit agreement agreement sign bern april intern commiss protect rhine pollut meet coordin group intern commiss protect rhine riparian state consid provid convent protect rhine open negoti end european commiss act behalf commun part negoti accord negoti direct council negoti complet januari light outcom negoti council decid march commun sign convent protect rhine subject subsequ conclus authoris sign behalf commun convent protect rhine sign april bern switzerland decid articl convent protect rhine approv behalf commun text convent attach decis articl presid council authoris design person person empow deposit instrument approv govern swiss confeder accord articl convent brussel novemb council presid voynet opinion deliv publish offici journal oj