For some conflicts, yes. The Good Friday agreement in Ireland is a legal fiction, only possible because of the EU. Basically, the border vanishes because both sides are members of the EU and thus, via the EU have the right to move across that border at any time for any purpose.
For some conflicts, yes. The Good Friday agreement in Ireland is a legal fiction, only possible because of the EU. Basically, the border vanishes because both sides are members of the EU and thus, via the EU have the right to move across that border at any time for any purpose.