commiss regul eec august classif good subhead common custom tariff commiss european commun regard treati establish european econom commun regard council regul eec januari measur uniform applic nomenclatur common custom tariff amend regul eec articl thereof ensur uniform applic common custom tariff nomenclatur adopt provis classif ga oil undergo sulphur acid treatment involv addit basic product sulphur acid quantiti litr volum neutral sodium hydroxid solut quantiti litr volum subsequ treatment activ carbon forc percol unter pump pressur filter common custom tariff annex council regul eec amend regul eec refer subhead ga oil undergo specif process footnot read entri subhead subject condit determin compet author subhead ga oil purpos subhead consider classif ga oil question addit note chapter list oper term specif process appli subparagraph note read process compris oper process concentr sulphur acid oleum sulphur anhydrid neutral alkalin agent decolour purif natur activ earth activ earth activ charcoal bauxit classif ga oil question subhead subhead depend treatment undergon regard specif process purpos note addit note detail minimum quantiti sulphur acid sodium hydroxid treatment structur content chapter oper regard specif process give entitl exempt custom duti appreci characterist basic product oper made relat basic product volum sulphur acid volum sodium hydroxid solut fulfil aforement condit oper ga oil question undergon regard specif process purpos note ga oil classifi subhead measur regul accord opinion committe common custom tariff nomenclatur adopt regul articl ga oil undergo sulphur acid process involv addit basic product sulphur acid quantiti litr volum neutral sodium hydroxid solut quantiti litr volum subsequ treatment activ carbon forc percol pump pressur filter classifi subhead common custom tariff heavi oil ga oil purpos articl reglat enter forc st dai public offici journal european commun regul bind entireti directli applic member state brussel august commiss nicola mosar member commiss oj oj oj oj