| Country | Action | Action Date | Effective Date |
|---|
| AFGHANISTAN | Accession | 16/11/1966 | |
| ALBANIA | Accession | 06/11/1958 | |
| ALGERIA | Accession | 31/10/1963 | |
| Antigua | Extension | 06/09/1957 | |
| ANTIGUA AND BARBUDA | Succession | 25/10/1988 | 01/11/1981 |
| Antilles | Extension | 03/12/1957 | |
| Antilles | Application | 01/01/1986 | 01/01/1986 |
| ARGENTINA | Accession | 13/08/1964 | |
| ARGENTINA | Objection | 03/10/1983 | |
| Aruba | Extension | 01/01/1986 | 01/01/1986 |
| AUSTRALIA | Signature | 07/09/1956 | |
| AUSTRALIA | Ratification | 06/01/1958 | |
| AUSTRALIAN TERRITORIES | Extension | 06/01/1958 | |
| AUSTRIA | Accession | 07/10/1963 | |
| AZERBAIJAN | Accession | 16/08/1996 | 16/08/1996 |
| Bahamas | Extension | 06/09/1957 | |
| BAHAMAS | Succession | 10/06/1976 | |
| BAHRAIN | Accession | 27/03/1990 | 27/03/1990 |
| BAHRAIN | Reservation | 27/03/1990 | |
| BANGLADESH | Accession | 05/02/1985 | |
| Barbados | Extension | 06/09/1957 | |
| BARBADOS | Succession | 09/08/1972 | |
| Basutoland | Extension | 06/09/1957 | |
| Bechuanaland | Extension | 06/09/1957 | |
| BELGIUM | Signature | 07/09/1956 | |
| BELGIUM | Ratification | 13/12/1962 | |
| Bermuda | Extension | 06/09/1957 | |
| BOLIVIA | Accession | 06/10/1983 | 06/10/1983 |
| BOSNIA AND HERZEGOVINA | Succession | 01/09/1993 | 06/03/1992 |
| BRAZIL | Accession | 06/01/1966 | |
| British Guiana | Extension | 06/09/1957 | |
| British Honduras | Extension | 06/09/1957 | |
| British Virgin Islands | Extension | 06/09/1957 | |
| Brunei | Extension | 06/09/1957 | |
| BULGARIA | Signature | 26/06/1957 | |
| BULGARIA | Ratification | 21/08/1958 | |
| BYELORUSSIA S S R | Signature | 07/09/1956 | |
| BYELORUSSIA S S R | Ratification | 05/06/1957 | |
| CAMBODIA | Accession | 12/06/1957 | |
| CAMEROON | Accession | 27/06/1984 | |
| CANADA | Signature | 07/09/1956 | |
| CANADA | Ratification | 10/01/1963 | |
| CENTRAL AFRICAN REPUBLIC | Accession | 30/12/1970 | |
| CEYLON | Signature | 05/06/1957 | |
| CEYLON | Ratification | 21/03/1958 | |
| Channel Islands | Extension | 30/04/1957 | |
| CHILE | Accession | 20/06/1995 | |
| CHINA | Declaration | 10/06/1997 | |
| CHINA | Communication | 03/12/1999 | 20/12/1999 |
| CONGO | Accession | 25/08/1977 | |
| Cook Islands | Extension | 26/04/1962 | |
| CROATIA | Succession | 12/10/1992 | 08/10/1991 |
| CUBA | Signature | 10/01/1957 | |
| CUBA | Ratification | 21/08/1963 | |
| Cyprus | Extension | 06/09/1957 | |
| CYPRUS | Succession | 11/05/1962 | |
| CZECH REPUBLIC | Succession | 22/02/1993 | 01/01/1993 |
| CZECHOSLOVAKIA | Signature | 07/09/1956 | |
| CZECHOSLOVAKIA | Ratification | 13/06/1958 | |
| DENMARK | Signature | 27/06/1957 | |
| DENMARK | Ratification | 24/04/1958 | |
| DJIBOUTI | Accession | 21/03/1979 | |
| Dominica | Extension | 18/10/1957 | |
| DOMINICA, COMMONWEALTH OF | Succession | 17/08/1994 | 03/11/1978 |
| DOMINICAN REPUBLIC | Accession | 31/10/1962 | |
| ECUADOR | Accession | 29/03/1960 | |
| EGYPT | Accession | 17/04/1958 | |
| EL SALVADOR | Signature | 07/09/1956 | |
| ETHIOPIA | Accession | 21/01/1969 | |
| Falkland Islands | Extension | 06/09/1957 | |
| Fiji | Extension | 06/09/1957 | |
| FIJI | Succession | 12/06/1972 | |
| FINLAND | Accession | 01/04/1959 | |
| FRANCE | Signature | 07/09/1956 | |
| FRANCE | Ratification | 26/05/1964 | |
| French Overseas Territories | Extension | 26/05/1964 | |
| GERMAN DEMOCRATIC REPUBLIC | Accession | 16/07/1974 | |
| GERMANY FEDERAL REPUBLIC | Signature | 07/09/1956 | |
| GERMANY FEDERAL REPUBLIC | Ratification | 14/01/1959 | |
| GHANA | Accession | 03/05/1963 | |
| Gibraltar | Extension | 06/09/1957 | |
| Gilbert And Ellice Islands | Extension | 06/09/1957 | |
| GREECE | Signature | 07/09/1956 | |
| GREECE | Ratification | 13/12/1972 | |
| Grenada | Extension | 06/09/1957 | |
| GUATEMALA | Signature | 07/09/1956 | |
| GUATEMALA | Ratification | 11/11/1983 | |
| GUINEA | Accession | 14/03/1977 | |
| HAITI | Signature | 07/09/1956 | |
| HAITI | Ratification | 12/02/1958 | |
| Hong Kong | Extension | 06/09/1957 | |
| Hong Kong | Notification | 10/06/1997 | 01/07/1997 |
| HONG KONG SAR | Application | 10/06/1997 | 01/07/1997 |
| HUNGARY | Signature | 07/09/1956 | |
| HUNGARY | Ratification | 26/02/1958 | |
| ICELAND | Accession | 17/11/1965 | |
| INDIA | Signature | 07/09/1956 | |
| INDIA | Ratification | 23/06/1960 | |
| IRAN | Accession | 30/12/1959 | |
| IRAQ | Signature | 07/09/1956 | |
| IRAQ | Ratification | 30/09/1963 | |
| IRELAND, REPUBLIC OF | Accession | 18/09/1961 | |
| Isle of Man | Extension | 30/04/1957 | |
| ISRAEL | Signature | 07/09/1956 | |
| ISRAEL | Ratification | 23/10/1957 | |
| ISRAEL | Objection | 25/06/1990 | |
| ITALY | Signature | 07/09/1956 | |
| ITALY | Ratification | 12/02/1958 | |
| IVORY COAST | Accession | 10/12/1970 | |
| Jamaica | Extension | 06/09/1957 | |
| JAMAICA | Succession | 30/07/1964 | |
| JAMAICA | Declaration | 30/07/1964 | |
| JORDAN | Accession | 27/09/1957 | |
| KAZAKHSTAN | Accession | 01/05/2008 | 01/05/2008 |
| Kenya | Extension | 06/09/1957 | |
| Kuwait | Extension | 21/10/1957 | |
| KUWAIT | Accession | 18/01/1963 | |
| KYRGYZSTAN | Accession | 05/09/1997 | 05/09/1997 |
| Land Berlin | Extension | 14/01/1959 | |
| LAOS | Accession | 09/09/1957 | |
| LATVIA | Accession | 14/04/1992 | 14/04/1992 |
| LESOTHO | Succession | 04/11/1974 | |
| LIBERIA | Signature | 07/09/1956 | |
| LIBYA | Accession | 16/05/1989 | 16/05/1989 |
| LUXEMBOURG | Signature | 07/09/1956 | |
| LUXEMBOURG | Ratification | 01/05/1967 | |
| Macao | Extension | 27/04/1999 | 27/04/1999 |
| MACEDONIA THE FYR OF | Succession | 18/01/1994 | 17/09/1991 |
| MALAGASY REPUBLIC | Accession | 29/02/1972 | |
| MALAWI | Accession | 02/08/1965 | |
| MALAYA | Accession | 18/11/1957 | |
| MALI | Accession | 02/02/1973 | |
| Malta | Extension | 06/09/1957 | |
| MALTA | Succession | 03/01/1966 | |
| MALTA | Notification | 03/01/1966 | |
| MAURITANIA | Accession | 06/06/1986 | 06/06/1986 |
| Mauritius | Extension | 06/09/1957 | |
| MAURITIUS | Succession | 18/07/1969 | |
| MAURITIUS | Declaration | 18/07/1969 | 12/03/1968 |
| MEXICO | Signature | 07/09/1956 | |
| MEXICO | Ratification | 30/06/1959 | |
| MONGOLIA | Accession | 20/12/1968 | |
| Montserrat | Extension | 06/09/1957 | |
| MOROCCO | Signature | 11/05/1959 | |
| NEPAL | Accession | 07/01/1963 | |
| NETHERLANDS THE | Signature | 07/09/1956 | |
| NETHERLANDS THE | Ratification | 03/12/1957 | |
| Netherlands West Indies | Extension | 06/09/1957 | |
| New Guinea | Extension | 03/12/1957 | |
| NEW ZEALAND | Accession | 26/04/1962 | |
| NEW ZEALAND | Declaration | 26/04/1962 | |
| NICARAGUA | Accession | 14/01/1986 | |
| NIGER | Accession | 22/07/1963 | |
| Nigeria | Extension | 01/07/1958 | |
| NIGERIA | Succession | 26/06/1961 | |
| NIGERIA | Declaration | 26/06/1961 | |
| Niue Island | Extension | 26/04/1962 | |
| North Borneo | Extension | 06/09/1957 | |
| NORWAY | Signature | 07/09/1956 | |
| NORWAY | Ratification | 03/05/1960 | |
| PAKISTAN | Signature | 07/09/1956 | |
| PAKISTAN | Ratification | 20/03/1958 | |
| PARAGUAY | Accession | 27/09/2007 | 27/09/2007 |
| PERU | Signature | 07/09/1956 | |
| PHILIPPINES | Accession | 17/11/1964 | |
| POLAND | Signature | 07/09/1956 | |
| POLAND | Ratification | 10/01/1963 | |
| PORTUGAL | Signature | 07/09/1956 | |
| PORTUGAL | Ratification | 10/08/1959 | |
| PORTUGAL | Communication | 18/11/1999 | |
| Qatar | Extension | 06/09/1957 | |
| Rhodesia And Nyasaland | Extension | 06/09/1957 | |
| ROUMANIA | Signature | 07/09/1956 | |
| ROUMANIA | Ratification | 13/11/1957 | |
| RWANDA | Accession | 04/10/2006 | 04/10/2006 |
| SAINT LUCIA | Succession | 14/02/1990 | 22/02/1979 |
| SAN MARINO | Signature | 07/09/1956 | |
| SAN MARINO | Ratification | 29/08/1967 | |
| Sarawak | Extension | 06/09/1957 | |
| SAUDI ARABIA | Accession | 05/07/1973 | |
| SENEGAL | Accession | 19/07/1979 | |
| Seychelles | Extension | 06/09/1957 | |
| SEYCHELLES | Accession | 05/05/1992 | 05/05/1992 |
| Sierra Leone | Extension | 06/09/1957 | |
| SIERRA LEONE | Succession | 13/03/1962 | |
| SIERRA LEONE | Declaration | 13/03/1962 | |
| Singapore | Extension | 06/09/1957 | |
| SINGAPORE | Succession | 28/03/1972 | |
| SINGAPORE | Notification | 28/03/1972 | |
| SLOVAK REPUBLIC | Succession | 28/05/1993 | 01/01/1993 |
| SLOVENIA | Succession | 06/07/1992 | 25/06/1991 |
| SOLOMON ISLANDS | Succession | 03/09/1981 | |
| Solomon Islands Protectorate | Extension | 06/09/1957 | |
| SOMALILAND | Extension | 12/02/1958 | |
| Somaliland Protectorate | Extension | 06/09/1957 | |
| SOVIET UNION | Signature | 07/09/1956 | |
| SOVIET UNION | Ratification | 12/04/1957 | |
| SPAIN | Accession | 21/11/1967 | |
| St Helena | Extension | 06/09/1957 | |
| St Kitts Nevis Anguilla | Extension | 06/09/1957 | |
| St Lucia | Extension | 06/09/1957 | |
| St Vincent | Extension | 06/09/1957 | |
| ST VINCENT AND THE GRENADINES | Accession | 09/11/1981 | |
| SUDAN | Signature | 07/09/1956 | |
| SUDAN | Ratification | 09/09/1957 | |
| Surinam | Extension | 03/12/1957 | |
| SURINAME | Succession | 12/10/1979 | |
| Swaziland | Extension | 06/09/1957 | |
| SWEDEN | Accession | 28/10/1959 | |
| SWITZERLAND | Accession | 28/07/1964 | |
| SYRIA | Accession | 17/04/1958 | |
| SYRIA | Statement | 25/09/1962 | |
| TAIWAN | Communication | 01/01/1905 | |
| TAIWAN | Signature | 23/05/1957 | |
| TAIWAN | Ratification | 28/05/1959 | |
| Tanganyika | Extension | 06/09/1957 | |
| TANGANYIKA | Accession | 28/11/1962 | |
| The Gambia | Extension | 06/09/1957 | |
| TOGO | Accession | 08/07/1980 | |
| Tokelau Islands | Extension | 26/04/1962 | |
| Tonga | Extension | 18/10/1957 | |
| Trinidad And Tobago | Extension | 14/11/1957 | |
| TRINIDAD AND TOBAGO | Succession | 11/04/1966 | 31/08/1962 |
| TRINIDAD AND TOBAGO | Declaration | 11/04/1966 | |
| Trucial States | Extension | 06/09/1957 | |
| TUNISIA | Accession | 15/07/1966 | |
| TURKEY | Signature | 28/06/1957 | |
| TURKEY | Ratification | 17/07/1964 | |
| TURKMENISTAN | Accession | 01/05/1997 | 01/05/1997 |
| Uganda | Extension | 30/10/1957 | |
| UGANDA | Accession | 12/08/1964 | |
| UKRAINE S S R | Signature | 07/09/1956 | |
| UKRAINE S S R | Ratification | 03/12/1958 | |
| UNITED KINGDOM | Signature | 07/09/1956 | |
| UNITED KINGDOM | Ratification | 30/04/1957 | |
| UNITED KINGDOM | Declaration | 28/02/1985 | |
| UNITED STATES OF AMERICA | Accession | 06/12/1967 | |
| URUGUAY | Accession | 07/06/2001 | 07/06/2001 |
| VIETNAM | Signature | 07/09/1956 | |
| YUGOSLAVIA | Signature | 07/09/1956 | |
| YUGOSLAVIA | Ratification | 20/05/1958 | |
| YUGOSLAVIA, FEDERAL REPUBLIC OF | Succession | 12/03/2001 | 27/04/1992 |
| ZAIRE | Accession | 28/02/1975 | |
| ZAMBIA | Succession | 26/03/1973 | |
| Zanzibar | Extension | 06/09/1957 | |
| ZIMBABWE | Succession | 01/12/1998 | 18/04/1980 |