In 1993, at the Copenhagen European Council, the European Union took a decisive step towards expanding the EU, what they called the Fifth Enlargement, agreeing that "the associated countries in Central and Eastern Europe that so desire shall become members of the European Union". Thus, enlargement was no longer a question of if, but when and how. The European Council stated that accession could occur when the prospective country is able to assume the obligations of membership, that is that all the economic and political conditions required are attained. Furthermore, it defined the membership criteria, which are regarded as the Copenhagen criteria, as follows: