(Norway did not ratify and so did not accede). Treaty of Accession 1979, concerning Greece Treaty of Accession 1985, concerning Spain and Portugal Treaty of Accession 1994, concerning Norway, Austria, Finland and Sweden (Norway did not ratify and so did not accede). Treaty of Accession 2003, concerning Czech Republic, Estonia, Cyprus, Latvia, Lithuania, Hungary, Malta, Poland, Slovenia, Slovakia Treaty of Accession 2005, concerning Romania and Bulgaria Treaty of Accession 2011, concerning Croatia