| Country | Action | Action Date | Effective Date |
|---|
| Aden Colony | Extension | 11/03/1954 | |
| AFGHANISTAN | Signature | 08/10/1951 | |
| AFGHANISTAN | Ratification | 19/03/1958 | |
| Anguilla | Extension | 11/03/1954 | |
| Antigua | Extension | 11/03/1954 | |
| ARMENIA | Acceptance | 23/08/2010 | 23/08/2010 |
| Ascension Island | Extension | 11/03/1954 | |
| AUSTRALIA | Accession | 05/03/1992 | |
| AUSTRIA | Accession | 12/06/1958 | |
| Bahamas | Extension | 14/03/1960 | |
| Barbados | Extension | 11/03/1954 | |
| BARBADOS | Succession | 13/04/1973 | |
| Belgian Congo | Extension | 31/10/1957 | |
| BELGIUM | Signature | 22/11/1950 | |
| BELGIUM | Ratification | 31/10/1957 | |
| BOLIVIA | Signature | 22/11/1950 | |
| BOLIVIA | Ratification | 22/09/1970 | |
| BOSNIA AND HERZEGOVINA | Succession | 01/09/1993 | 06/03/1992 |
| British Guiana | Extension | 11/03/1954 | |
| British Honduras | Extension | 11/03/1954 | |
| British Solomon Islands | Extension | 11/03/1954 | |
| British Togoland | Extension | 11/03/1954 | |
| British Virgin Islands | Extension | 11/03/1954 | |
| Brunei | Extension | 11/03/1954 | |
| BULGARIA | Accession | 14/03/1997 | 14/09/1997 |
| CAMBODIA | Accession | 05/11/1951 | |
| CAMEROON | Accession | 15/05/1964 | |
| Cayman Islands | Extension | 11/03/1954 | |
| Central Southern Line Islands | Extension | 11/03/1954 | |
| CEYLON | Accession | 08/01/1952 | |
| Channel Islands | Extension | 18/05/1955 | |
| COLOMBIA | Signature | 22/11/1950 | |
| CONGO | Accession | 26/08/1968 | |
| Cook Islands | Extension | 28/02/1964 | |
| CROATIA | Succession | 26/07/1993 | 08/10/1991 |
| CUBA | Accession | 27/08/1952 | |
| Cyprus | Extension | 16/09/1954 | |
| CYPRUS | Succession | 16/05/1963 | |
| CZECH REPUBLIC | Accession | 22/08/1997 | 22/08/1997 |
| DENMARK | Accession | 04/04/1960 | |
| Dominica | Extension | 16/09/1954 | |
| DOMINICAN REPUBLIC | Signature | 22/11/1950 | |
| ECUADOR | Signature | 22/11/1950 | |
| EGYPT | Signature | 22/11/1950 | |
| EGYPT | Ratification | 08/02/1952 | |
| EL SALVADOR | Signature | 04/12/1950 | |
| EL SALVADOR | Ratification | 24/06/1953 | |
| ESTONIA | Acceptance | 01/08/2001 | |
| Falkland Island Dependencies | Extension | 16/09/1954 | |
| Falkland Islands | Extension | 16/09/1954 | |
| Fiji | Extension | 11/03/1954 | |
| FIJI | Succession | 31/10/1972 | |
| FINLAND | Accession | 30/04/1956 | |
| FRANCE | Signature | 14/05/1951 | |
| FRANCE | Declaration | 10/12/1951 | |
| FRANCE | Ratification | 14/10/1957 | |
| GABON | Accession | 04/09/1962 | |
| GERMANY FEDERAL REPUBLIC | Accession | 09/08/1957 | |
| GERMANY FEDERAL REPUBLIC | Declaration | 09/08/1957 | |
| GERMANY FEDERAL REPUBLIC | Declaration | 25/09/1957 | |
| GHANA | Succession | 07/04/1958 | |
| Gibraltar | Extension | 11/03/1954 | |
| Gilbert And Ellice Islands | Extension | 11/03/1954 | |
| Gold Coast | Extension | 11/03/1954 | |
| GREECE | Signature | 22/11/1950 | |
| GREECE | Ratification | 12/12/1955 | |
| Grenada | Extension | 16/09/1954 | |
| GUATEMALA | Signature | 22/11/1950 | |
| GUATEMALA | Ratification | 08/07/1960 | |
| GUINEA BISSAU | Signature | 24/09/2013 | |
| HAITI | Signature | 22/11/1950 | |
| HAITI | Ratification | 14/05/1954 | |
| HOLY SEE | Accession | 22/08/1979 | |
| HONDURAS | Signature | 13/04/1954 | |
| HONG KONG SAR | Application | 06/10/1997 | 01/07/1997 |
| HUNGARY | Accession | 15/03/1979 | |
| HUNGARY | Declaration | 15/03/1979 | |
| INDONESIA | Objection | 29/11/1957 | |
| IRAN | Accession | 09/02/1951 | 07/01/1966 |
| IRAQ | Accession | 11/08/1972 | |
| IRAQ | Declaration | 11/08/1972 | |
| IRELAND, REPUBLIC OF | Accession | 19/09/1978 | |
| Isle of Man | Extension | 18/05/1955 | |
| ISRAEL | Signature | 22/11/1950 | |
| ISRAEL | Ratification | 27/03/1952 | |
| ISRAEL | Declaration | 20/10/1972 | |
| ITALY | Accession | 26/11/1962 | |
| IVORY COAST | Accession | 19/07/1963 | |
| Jamaica | Extension | 11/03/1954 | |
| JAPAN | Accession | 17/06/1970 | |
| JORDAN | Accession | 31/12/1958 | |
| KAZAKHSTAN | Accession | 21/12/1998 | 21/12/1998 |
| Kenya | Extension | 11/03/1954 | |
| KENYA | Accession | 15/03/1967 | |
| KENYA | Reservation | 15/03/1967 | |
| KYRGYZSTAN | Acceptance | 19/07/2005 | 19/07/2005 |
| Land Berlin | Extension | 25/09/1957 | |
| LAOS | Accession | 28/02/1952 | |
| LATVIA | Acceptance | 20/11/2001 | |
| Leeward Islands | Extension | 11/03/1954 | |
| LIBERIA | Acceptance | 16/09/2005 | 16/09/2005 |
| LIBYA | Accession | 22/01/1973 | |
| LIBYA | Declaration | 22/01/1973 | |
| LIECHTENSTEIN | Extension | 16/06/1975 | |
| LITHUANIA | Accession | 21/08/1998 | 21/08/1998 |
| LUXEMBOURG | Signature | 22/11/1950 | |
| LUXEMBOURG | Ratification | 31/10/1957 | |
| MACEDONIA THE FYR OF | Succession | 02/09/1997 | 17/11/1997 |
| MADAGASCAR | Accession | 23/05/1962 | |
| MALAWI | Accession | 17/08/1965 | |
| Malay States, Federated | Extension | 11/03/1954 | |
| Malaya | Extension | 11/03/1954 | |
| MALAYSIA | Succession | 29/06/1959 | |
| Malta | Extension | 11/03/1954 | |
| MALTA | Succession | 19/01/1968 | |
| Mauritius | Extension | 11/03/1954 | |
| MAURITIUS | Succession | 18/07/1969 | |
| MOLDOVA REPUBLIC OF | Accession | 03/09/1998 | 03/09/1998 |
| MONACO | Accession | 18/03/1952 | |
| Montserrat | Extension | 11/03/1954 | |
| MOROCCO | Accession | 25/07/1968 | |
| NETHERLANDS THE | Signature | 22/11/1950 | |
| NETHERLANDS THE | Ratification | 31/10/1957 | |
| NETHERLANDS THE | Declaration | 31/10/1957 | |
| Netherlands West Indies | Extension | 11/03/1954 | |
| New Guinea | Extension | 31/10/1957 | |
| NEW ZEALAND | Signature | 16/03/1951 | |
| NEW ZEALAND | Ratification | 29/06/1962 | |
| NICARAGUA | Accession | 17/12/1963 | |
| NIGER | Accession | 22/04/1968 | |
| Nigeria | Extension | 11/03/1954 | |
| NIGERIA | Succession | 26/06/1961 | |
| Niue Island | Extension | 28/02/1964 | |
| North Borneo | Extension | 16/09/1954 | |
| NORWAY | Accession | 02/04/1959 | |
| OMAN | Accession | 19/12/1977 | |
| PAKISTAN | Signature | 09/05/1951 | |
| PAKISTAN | Ratification | 17/01/1952 | |
| PERU | Signature | 08/07/1964 | |
| PHILIPPINES | Signature | 22/11/1950 | |
| PHILIPPINES | Ratification | 30/08/1952 | |
| POLAND | Accession | 24/09/1971 | |
| PORTUGAL | Accession | 11/06/1984 | |
| Rhodesia And Nyasaland | Extension | 22/03/1956 | |
| ROMANIA | Accession | 24/11/1970 | |
| ROMANIA | Declaration | 24/11/1970 | |
| Ruanda Urundi | Extension | 31/10/1957 | |
| RUSSIAN FEDERATION | Accession | 07/10/1994 | |
| RWANDA | Succession | 01/12/1964 | |
| SAN MARINO | Accession | 30/07/1985 | |
| Sarawak | Extension | 11/03/1954 | |
| Seychelles | Extension | 11/03/1954 | |
| Sierra Leone | Extension | 11/03/1954 | |
| SIERRA LEONE | Succession | 13/03/1962 | |
| Singapore | Extension | 11/03/1954 | |
| SINGAPORE | Accession | 11/07/1969 | |
| SLOVAK REPUBLIC | Accession | 09/06/1997 | 07/09/1997 |
| SLOVENIA | Succession | 06/07/1992 | |
| SOLOMON ISLANDS | Succession | 03/09/1981 | |
| Somaliland Protectorate | Extension | 11/03/1954 | |
| SPAIN | Accession | 07/07/1955 | |
| St Christopher, Nevis and Anguilla | Extension | 11/03/1954 | |
| St Helena | Extension | 11/03/1954 | |
| St Lucia | Extension | 16/09/1954 | |
| St Vincent | Extension | 16/09/1954 | |
| Surinam | Extension | 31/10/1957 | |
| SWEDEN | Signature | 20/11/1951 | |
| SWEDEN | Ratification | 21/05/1952 | |
| SWITZERLAND | Signature | 22/11/1950 | |
| SWITZERLAND | Ratification | 07/04/1953 | |
| SWITZERLAND | Reservation | 07/04/1953 | |
| SWITZERLAND | Declaration | 16/06/1975 | |
| SYRIA | Signature | 07/08/1979 | |
| SYRIA | Ratification | 16/09/1980 | |
| TAIWAN | Signature | 22/11/1950 | |
| Tanganyika | Extension | 11/03/1954 | |
| TANGANYIKA | Accession | 26/03/1963 | |
| THAILAND | Signature | 22/11/1950 | |
| THAILAND | Ratification | 18/06/1951 | |
| The Gambia | Extension | 11/03/1954 | |
| TOGO | Acceptance | 16/11/2009 | 16/11/2009 |
| Tokelau Islands | Extension | 29/06/1962 | |
| Tonga | Extension | 16/09/1954 | |
| TONGA | Succession | 11/11/1977 | |
| Trinidad And Tobago | Extension | 11/03/1954 | |
| TRINIDAD AND TOBAGO | Succession | 11/04/1966 | |
| Tunisia | Extension | 10/12/1951 | |
| TUNISIA | Succession | 14/05/1971 | |
| Turks And Caicos Islands | Extension | 11/03/1954 | |
| Uganda | Extension | 11/03/1954 | |
| UGANDA | Accession | 15/04/1965 | |
| UNITED KINGDOM | Signature | 22/11/1950 | |
| UNITED KINGDOM | Ratification | 11/03/1954 | |
| UNITED KINGDOM | Declaration | 11/03/1954 | |
| UNITED KINGDOM | Declaration | 19/06/1954 | |
| UNITED KINGDOM | Declaration | 18/05/1955 | |
| UNITED KINGDOM | Declaration | 22/03/1956 | |
| UNITED KINGDOM | Declaration | 14/03/1960 | |
| UNITED KINGDOM | Notification | 10/06/1997 | 01/07/1997 |
| UNITED STATES OF AMERICA | Signature | 24/06/1959 | |
| UNITED STATES OF AMERICA | Ratification | 02/11/1966 | |
| UNITED STATES OF AMERICA | Declaration | 02/11/1966 | |
| UPPER VOLTA | Accession | 14/09/1965 | |
| URUGUAY | Signature | 24/04/1964 | |
| URUGUAY | Ratification | 20/04/1999 | 20/04/1999 |
| VENEZUELA | Accession | 01/05/1992 | |
| VIETNAM, REPUBLIC OF | Accession | 01/06/1952 | |
| Western Pacific High Commsn Territories | Extension | 11/03/1954 | |
| YUGOSLAVIA | Accession | 26/04/1951 | |
| YUGOSLAVIA, FEDERAL REPUBLIC OF | Succession | 12/03/2001 | 27/04/1992 |
| ZAIRE | Succession | 03/05/1962 | |
| ZAMBIA | Succession | 01/11/1974 | |
| Zanzibar | Extension | 11/03/1954 | |
| ZIMBABWE | Succession | 01/12/1998 | 18/04/1980 |