council direct novemb amend time benzen direct eec approxim law regul administr provis member state relat restrict market danger substanc prepar eec council european commun regard treati establish european econom commun articl thereof regard propos commiss regard opinion european parliament regard opinion econom social committe benzen recogn highli toxic liabl affect central nervou herma topoiet system induc cancer leukaemia benzen inter alia constitu manufactur toi make children absorb benzen inhal ingest skin expos abovement hazard fix maximum concentr limit benzen free state enabl hazard exclud benzen govern rule member state rule differ condit market differ constitut barrier trade directli affect establish function common market order elimin differ annex direct eec amend direct eec supplement scientif advisori committe toxic eco toxic chemic compound deliv opinion point adopt direct articl entri ad annex direct eec benzen ca chemic abstract servic number permit toi part toi market concentr benzen free state excess mg kg weight toi part toi articl member state measur compli direct month notif forthwith inform commiss thereof articl direct address member state brussel novemb council presid ellemann jensen oj oj oj oj oj