council decis june supplement annex iv convent protect rhine chemic pollut eec council european commun regard treati establish european econom commun articl thereof regard propos commiss regard opinion european parliament regard opinion econom social committe council decis eec juli european econom commun conclud convent protect rhine chemic pollut hereinaft call quot chemic convent quot addit agreement agreement sign bern april intern commiss protect rhine pollut hereinaft call quot intern commiss quot articl chemic convent intern commiss propos mean amend annex iv convent limit valu discharg substanc surfac water rhine basin articl chemic convent unanim adopt contract parti requir entri forc amend intern commiss drawn limit valu mercuri form recommend intend supplement annex iv chemic convent desir commun contract parti chemic convent adopt abovement recommend decid articl recommend intern commiss protect rhine pollut intend supplement annex iv convent protect rhine chemic pollut sign bonn decemb adopt behalf european econom commun text recommend attach articl presid council notifi govern swiss confeder accord procedur laid chemic convent adopt recommend refer articl luxembourg june council presid aert oj oj oj oj recommend intern commiss protect rhine pollut supplement annex iv convent protect rhine chemic pollut sign bonn decemb intern commiss protect rhine pollut regard convent protect rhine chemic pollut sign bonn decemb regard articl thereof propos contract parti convent annex iv convent decemb supplement respect mercuri limit valu articl gt pic file quot quot gt pursuant articl convent measur set tabl enter forc unanim adopt contract parti convent contract parti notifi adopt govern swiss confeder acknowledg recept notif