Why the law says “Yes” even if others disagree. What happens when the domestic legal system is inherently international?

According to Article 20 of the Treaty of Lisbon, EU citizenship is additional and separate to national citizenship. Presently, there are no provisions for removing this citizenship and its associated rights from individuals, regardless of whether their nation leaves the EU.

After China denied citizenship status to non-Chinese residents, about 7,000 ethnic minority families received full British nationality, granting them the ability to live across Europe and pass this status onto their descendants.