Participant Signature Ratification, Accession (a), Succession (b) New Zealand Nicaragua Niger Nigeria Norway 14 January 1986 15 April 1985 10 December 1989 Panama Paraguay Peru Philippines Poland 22 February 1985 23 October 1989 29 May 1985 Portugal Qatar Republic of Korea Republic of Moldova Romania 28 July 1988 4 February 1985 13 January 1986 4 February 1985 Russian Federation Saint Vincent and the Grenadines San Marino Sao Tome and Principe Saudi Arabia 10 December 1985 Senegal Serbia and Montenegro Seychelles Sierra Leone Slovakia 4 February 1985 Slovenia Somalia South Africa Spain Sri Lanka Sudan Swaziland Sweden Switzerland Syrian Arab Republic 5 October 1998a 28 June 2001 9 July 1986 24 August 1987 12 March 1990 7 July 1988 18 June 1986a 26 July 1989 9 February 1989 11 January 2000a 9 January 1995a 28 November 1995a 18 December 1990a 3 March 1987 1 August 2001a 18 September 2002 6 September 2000 23 September 1997a 18 March 1985 29 January 1993 4 February 1985 21 August 1986 12 March 2001b 5 May 1992a 25 April 2001 28 May 1993b 16 July 1993a 24 January 1990a 10 December 1998 21 October 1987 3 January 1994a 4 June 1986 4 February 1985 4 February 1985 26 March 2004a 8 January 1986 2 December 1986 19 August 2004a 85