Treaty
on European Union
lRepresentatives from each of the EC countries
negotiated the Maastrich
Treaty on European Union in 1991, in Maastrich, the Netherlands.
lA
provision of the treaty mandated that the voters of each member state had to approve the European Union by popular
referendum.
lThe treaty was ratified in
October 1993.
lThe European Union was
established on November 1, when the treaty went into effect.
