Party Signed Deposited Reservations Notes Afghanistan 9 December 1986 -- Albania 20 December 1989 -- Algeria 27 January 1992 Angola 8 November 1990 Antigua and Barbuda 1 January 1989 Implicit on succession. Succeeded from the United Kingdom. Argentina 12 May 1969 -- Australia 24 May 1930 Withdrawn in 1986. Austria 17 June 1925 9 May 1928 -- Bahrain 9 December 1988 Bangladesh 20 May 1989 Barbados 16 July 1976 Withdrew the reservations made by the United Kingdom on succession. Succeeded from the United Kingdom. Belgium 17 June 1925 4 December 1928 Withdrawn in 1997. Benin 9 December 1986 -- Bhutan 19 February 1979 -- Bolivia 14 January 1985 -- Brazil 17 June 1925 28 August 1970 -- Bulgaria 17 June 1925 7 March 1934 Withdrawn in 1991. Burkina Faso 3 March 1971 -- Ratified as the Republic of Upper Volta. Cambodia 15 March 1983 The Protocol was ratified by the Coalition Government of Democratic Kampuchea in exile in 1983. 13 states (including the depositary France) objected to their ratification, and considered it legally invalid. In 1993, the Kingdom of Cambodia stated in a note verbale that it considered itself bound by the provisions of the Protocol. Cameroon 20 July 1989 -- Canada 17 June 1925 6 May 1930 Withdrawn in 1991 as regards bacteriological agents, and completely withdrawn in 1999. Cape Verde 15 October 1991 -- Central African Republic 31 July 1970 -- Chile 17 June 1925 2 July 1935 Withdrawn in 1991. China 13 July 1952 Made on succession. The People 's Republic of China succeeded from the Republic of China, which had acceded on 24 August 1929. Colombia 24 November 2015 -- Costa Rica 13 February 2009 -- Côte d'Ivoire 27 July 1970 -- Croatia 18 December 2006 -- Cuba 24 June 1966 -- Cyprus 12 December 1966 Implicit on succession. Succeeded from the United Kingdom. Czech Republic 17 September 1993 Withdrawn prior to succession. Succeeded from Czechoslovakia. Denmark 17 June 1925 5 May 1930 -- Dominican Republic 8 December 1970 -- Ecuador 16 September 1970 -- Egypt 17 June 1925 6 December 1928 -- El Salvador 17 June 1925 26 February 2008 -- Equatorial Guinea 20 May 1989 -- Estonia 17 June 1925 28 August 1931 Withdrawn in 1999. Ethiopia 17 June 1925 7 October 1935 -- Fiji 21 March 1973 Retained the United Kingdom 's reservations on succession. Succeeded from the United Kingdom. Finland 17 June 1925 26 June 1929 -- France 17 June 1925 10 May 1926 Withdrawn in 1996. Gambia 5 November 1966 Implicit on succession. Succeeded from the United Kingdom. Germany 17 June 1925 25 April 1929 -- Ghana 3 May 1967 -- Greece 17 June 1925 30 May 1931 -- Grenada 20 May 1989 Implicit on succession. Succeeded from the United Kingdom. Guatemala 3 May 1983 -- Guinea - Bissau 20 May 1989 -- Holy See 18 October 1966 -- Hungary 11 October 1952 -- Iceland 2 November 1967 -- India 17 June 1925 9 April 1930 Indonesia 21 January 1971 Implicit on succession. Succeeded from the Netherlands. Iran 5 November 1929 -- Iraq 8 September 1931 Ireland 29 August 1930 Withdrawn in 1972. Israel 20 February 1969 Italy 17 June 1925 3 April 1928 -- Jamaica 28 July 1970 Implicit on succession. Succeeded from the United Kingdom. Japan 17 June 1925 21 May 1970 -- Jordan 20 January 1977 Kenya 6 July 1970 -- Korea, Democratic People 's Republic of 4 January 1989 Korea, Republic of 4 January 1989 Reservation 2 withdrawn in 2002 as regards biological agents covered by the BWC. Kuwait 15 December 1971 Laos 20 May 1989 -- Latvia 17 June 1925 3 June 1931 -- Lebanon 17 April 1969 -- Lesotho 10 March 1972 Implicit on succession. Succeeded from the United Kingdom. Liberia 17 June 1927 -- Libya 29 December 1971 Liechtenstein 6 September 1991 -- Lithuania 17 June 1925 15 June 1933 -- Luxembourg 17 June 1925 1 September 1936 -- Macedonia 20 August 2015 -- Madagascar 2 August 1967 -- Malawi 14 September 1970 -- Malaysia 10 December 1970 -- Maldives 27 December 1966 -- Malta 15 October 1970 Implicit on succession. Succeeded from the United Kingdom. Mauritius 8 January 1971 Implicit on succession. Succeeded from the United Kingdom. Mexico 28 May 1932 -- Moldova 4 November 2010 -- Monaco 6 January 1967 -- Mongolia 6 December 1968 Withdrawn in 1990. Morocco 13 October 1970 -- Nepal 9 May 1969 -- Netherlands 17 June 1925 31 October 1930 Withdrawn in 1995. New Zealand 24 May 1930 Withdrawn in 1989. Nicaragua 17 June 1925 5 October 1990 -- Niger 5 April 1967 Implicit on succession. Succeeded from France. Nigeria 15 October 1968 Norway 17 June 1925 27 July 1932 -- Pakistan 15 April 1960 Implicit on succession. Succeeded from India. Panama 4 December 1970 -- Papua New Guinea 2 September 1980 Retained Australia 's reservations on succession. Succeeded from Australia. Paraguay 22 October 1933 -- Peru 13 August 1985 -- Philippines 8 June 1973 -- Poland 17 June 1925 4 February 1929 -- Portugal 17 June 1925 1 July 1930 Reservation 2 withdrawn in 2003, and reservation 1 withdrawn in 2014. Qatar 18 October 1976 -- Romania 17 June 1925 23 August 1929 Withdrawn in 1991. Russia 5 April 1928 Withdrawn in 2001. Ratified as the Union of Soviet Socialist Republics. Rwanda 11 May 1964 Implicit on succession. Succeeded from Belgium. Saint Kitts and Nevis 15 November 1989 Implicit on succession. Succeeded from the United Kingdom. Saint Lucia 21 December 1988 Implicit on succession. Succeeded from the United Kingdom. Saint Vincent and the Grenadines 24 March 1999 Implicit on succession. Succeeded from the United Kingdom. Saudi Arabia 27 January 1971 -- Senegal 15 June 1977 -- Serbia 3 June 2006 Implicit on succession. Serbia 's Parliament voted to withdraw their reservation in May 2009 and the withdrawal was announced in 2010, but the depositary has not been notified. Succeeded as the Federal Republic of Yugoslavia from the Socialist Federal Republic of Yugoslavia, which had ratified the treaty as the Kingdom of Serbs, Croats and Slovenes. Sierra Leone 20 March 1967 -- Slovakia 22 September 1993 Withdrawn prior to succession. Succeeded from Czechoslovakia. Slovenia 8 April 2008 -- Solomon Islands 1 June 1981 Retained the United Kingdom 's reservations on succession. Succeeded from the United Kingdom. South Africa 24 May 1930 Withdrawn in 1996. Spain 17 June 1925 22 August 1929 Withdrawn in 1992. Sri Lanka 20 January 1954 -- Ratified as the Dominion of Ceylon. Sudan 17 December 1980 -- Swaziland 23 July 1991 -- Sweden 17 June 1925 25 April 1930 -- Switzerland 17 June 1925 12 July 1932 -- Syria 17 December 1968 Tanzania 22 April 1963 -- Ratified as he Republic of Tanganyika. Thailand 17 June 1925 6 June 1931 -- Ratified as Siam. Togo 5 April 1971 -- Tonga 19 July 1971 Implicit on succession. Succeeded from the United Kingdom. Trinidad and Tobago 30 November 1970 Implicit on succession. Succeeded from the United Kingdom. Tunisia 12 July 1967 -- Turkey 17 June 1925 5 October 1929 -- Uganda 24 May 1965 -- Ukraine 7 August 2003 Implicit on succession. Succeeded from the Union of Soviet Socialist Republics. United Kingdom 17 June 1925 9 April 1930 Reservation 2 withdrawn in 1991 as regards biological agents covered by the BWC, and reservations completely withdrawn in 2002. United States of America 17 June 1925 10 April 1975 Uruguay 17 June 1925 12 April 1977 -- Venezuela 17 June 1925 8 February 1928 -- Viet Nam 15 December 1980 Yemen 17 March 1971 Made in a second instrument of accession submitted on 16 September 1973. Ratified as the Yemen Arab Republic. Also ratified by the People 's Democratic Republic of Yemen on 20 October 1986, prior to Yemeni unification in 1990.
when did the us sign the geneva protocol
June 1925 10 June 1925 10