State Date of signature Date of receipt of the instrument of ratification or accession Nigeria Norway Panama Paraguay Peru 28 July 1988 4 February 1985 22 February 1985 23 October 1989 29 May 1985 28 June 2001 9 July 1986 24 August 1987 12 March 1990 7 July 1988 13 January 1986 4 February 1985 18 June 1986a 26 July 1989 9 February 1989 11 January 2000a 9 January 1995a Philippines Poland Portugal Qatar Republic of Korea Republic of Moldova Romania Russian Federation Saint Vincent and the Grenadines Sao Tome and Principe Saudi Arabia Senegal Serbia and Montenegro Seychelles Sierra Leone Slovakia Slovenia Somalia South Africa Spain Sri Lanka Sudan Swaziland Sweden Switzerland Tajikistan The former Yugoslav Republic of Macedonia Timor Leste Togo Tunisia 10 December 1985 28 November 1995a 18 December 1990a 3 March 1987 1 August 2001a 6 September 2000 4 February 1985 18 March 1985 29 January 1993 4 February 1985 23 September 1997a 21 August 1986 12 March 2001b 5 May 1992a 25 April 2001 29 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 11 January 1995a 12 December 1994b 25 March 1987 26 August 1987 16 April 2003 18 November 1987 23 September 1988 103