There are 16 Non-Consultative Parties to the Antarctic Treaty. Non-Consultative Parties Date of accession Czech Republic (1) 14 Jun 1962 Slovak Republic (1) 14 Jun 1962 Denmark 20 May 1965 Romania 15 Sep 1971 Bulgaria 11 Sep 1978 Papua New Guinea (2) 16 Mar 1981 Hungary 27 Jan 1984 Cuba 16 Aug 1984 Greece 8 Jan 1987 Democratic People's Republic of Korea 21 Jan 1987 Austria 25 Aug 1987 Canada 4 May 1988 Colombia 31 Jan 1989 Switzerland 15 Nov 1990 Guatemala 31 Jul 1991 Ukraine 28 Oct 1992 Notes 1. Succeeded to the Treaty as part of Czechoslovakia which separated into two republics on 1 January 1993. 2. Succeeded to the Treaty after independence from Australia.