" In the second place, the revocation of the notification of the intention to withdraw must, first, be submitted in writing to the European Council and, secondly, be unequivocal and unconditional, that is to say that the purpose of that revocation is to confirm the EU membership of the Member State concerned under terms that are unchanged as regards its status as a Member State, and that revocation brings the withdrawal procedure to an end."
This means that any withdrawal from Atricle 50 can only be proper if this is the true end of the procedure. Otherwise, it would not be "unconditional".