- 83 State party Date of entry into force Poland Portugal Russian Federation Senegal Slovakia 12 June 1993 11 March 1989 1 October 1991 16 October 1996 17 April 1995 Slovenia South Africa Spain Sweden Switzerland 16 July 1993 10 December 1998 20 November 1987 26 June 1987 26 June 1987 Togo Tunisia Turkey Uruguay Venezuela 18 December 1987 23 October 1988 1 September 1988 26 June 1987 26 April 1994 Yugoslavia 10 October 1991 States parties that have only made the declaration provided for in article 21 of the Convention, as at 17 May 2002 Japan Uganda United Kingdom of Great Britain and Northern Ireland United States of America 29 June 1999 19 December 2001 8 December 1988 21 October 1994 States parties that have only made the declaration provided for in article 22 of the Convention, as at 17 May 2002b Azerbaijan Mexico Seychelles 4 February 2002 15 March 2002 6 August 2001 a Total of 46 States parties. b A total of 49 States parties have made the declaration under article 22.