The point of EU law that has been identified as potentially requiring a reference to the CJEU is the question of whether an Article 50 notification can be withdrawn by the Member State making it before it leaves the EU. Article 50 is silent on the question, and it is hard to see that it could be regarded as “acte clair”. (For what it is worth, my view is that such a notification is reversible by the Member State concerned: the silence of Article 50 on the point is not a reliable basis for arguing the contrary, and it would, in my view, be an extraordinary result, in a Union founded on democratic values and with the aim of sharing a peaceful future – see the preamble to the EU Charter of Fundamental Rights – for a Member State that had democratically changed its mind on the question of leaving the EU then to be forced out against its will. That view is shared by a number of commentators including Sir David Edward KCMG, a former Judge of the CJEU.)