Artikel 20

(1). (a) This Convention shall be signed in a single copy in English, French, Russian and Spanish, all texts being equally authentic, and shall be deposited with the Government of Sweden.
(b) This Convention shall remain open for signature at Stockholm until January 13, 1968.
(2). Official texts shall be established by the Director General, after consultation with the interested Governments, in German, Italian and Portuguese, and such other languages as the Conference may designate.
(3). The Director General shall transmit two duly certified copies of this Convention and of each amendment adopted by the Conference to the Governments of the States members of the Paris or Berne Unions, to the Government of any other State when it accedes to this Convention, and, on request, to the Government of any other State. The copies of the signed text of the Convention transmitted to the Governments shall be certified by the Government of Sweden.
(4). The Director General shall register this Convention with the Secretariat of the United Nations.