Good Neighbourly Relations in EU Law

This contribution argues that the legal context of the EU is substantially different from the classical context within which the international law principle of good neighbourly relations is usually deployed, altering the traditional understanding of the principle to a great degree. Firstly, to be a good neighbour in the context of the Union implies not only respect for international law vis-à-vis neighbouring states and a strict adherence to the acquis. It also indispensably implies strict adherence to the values of the Union, including democracy, the rule of law and the protection of human rights – if not justice and minority protection. Being a good neighbour in the EU thus means being a particular type of state, embracing a particular type of constitutionalism. Secondly, the principle of good neighbourly relations, particularly in the context of EU enlargements and EU citizenship, implies that the Member States should be ready to adapt their national laws to the Union reality even outside the context of the EU acquis. In other words, having legitimate regulation in place, which is not in breach of international or EU law per se, can still amount to a violation of the principle of good neighbourly relations in the Union context. Given the specificity of the legal reality of interdependence that the Union has shaped, it is perfectly legitimate to expect the EU to intervene should some Member States fail to internalise this special EU reality and cause negative externalities.