DOCUMENTS CONCERNING THE ACCESSION TO THE EUROPEAN COMMUNITIES OF THE KINGDOM OF DENMARK, IRELAND, THE KINGDOM OF NORWAY AND THE UNITED KINGDOM OF GREAT BRITAIN AND NORTHERN IRELAND, TREATY BETWEEN THE KINGDOM OF BELGIUM, THE FEDERAL REPUBLIC OF GERMANY, THE FRENCH REPUBLIC, THE ITALIAN REPUBLIC, THE GRAND DUCHY OF LUXEMBOURG, THE KINGDOM OF THE NETHERLANDS ( MEMBER STATES OF THE EUROPEAN COMMUNITIES ), THE KINGDOM OF DENMARK, IRELAND, THE KINGDOM OF NORWAY AND THE UNITED KINGDOM OF GREAT BRITAIN AND NORTHERN IRELAND CONCERNING THE ACCESSION OF THE KINGDOM OF DENMARK, IRELAND, THE KINGDOM OF NORWAY AND THE UNITED KINGDOM OF GREAT BRITAIN AND NORTHERN IRELAND TO THE EUROPEAN ECONOMIC COMMUNITY AND TO THE EUROPEAN ATOMIC ENERGY COMMUNITY, PREAMBLE