Letter dated 94/12/19 from the representative of the United States of America to the Conference, the Permanent Representative of the United Kingdom and Northern Ireland to the Conference, the Permanent Representative of the Russian Federation to the Conference and the Permanent Representative of Ukraine addressed to the Secretary-General of the Conference transmitting the text of a Joint Declaration of the leaders of Ukraine, Russia, the United Kingdom of Great Britain and Northern Ireland and the United States of America, as well as a memorandum on security assurances in connection with Ukraine's accession to the Non-Proliferation Treaty, signed in Budapest on 5 December 1994.