By way of background, in a reference for preliminary ruling in case C-358/11 Lapin elinkeino, the Court of Justice has ruled, amongst other issues, that Articles 67 and 128 of the REACH Regulation must be interpreted as meaning that EU law harmonises the requirements relating to the manufacture, placing on the market or use of a substance such as that relating to arsenic compounds which is the subject of a restriction under Annex XVII to that regulation.