1 . APPROXIMATION OF LAWS - DISPOSAL OF WASTE OILS - DIRECTIVE NO 75/439 - RESTRICTION OF FREEDOM OF TRADE AND OF COMPETITION - WHETHER PERMISSIBLE - CONDITIONS ( COUNCIL DIRECTIVE NO 75/439 ) 2 . APPROXIMATION OF LAWS - DISPOSAL OF WASTE OILS - DIRECTIVE NO 75/439 - NATIONAL LEGISLATION ON BURNING - COMPATIBILITY - CRITERIA ( COUNCIL DIRECTIVE NO 75/439 )