Artikel 26

This Convention shall be open for signature at the United Nations Office at Vienna, from 20 December 1988 to 28 February 1989, and thereafter at the Headquarters of the United Nations at New York, until 20 December 1989, by:
(a) All States;
(b) Namibia, represented by the United Nations Council for Namibia;
(c) Regional economic integration organizations which have competence in respect of the negotiation, conclusion and application of international agreements in matters covered by this Convention, references under the Convention to Parties, States or national services being applicable to these organizations within the limites of their competence.