| Country | Action | Action Date | Effective Date |
|---|
| Alaska | Extension | 06/12/1954 | |
| ALGERIA | Accession | 28/05/1973 | 28/08/1973 |
| ANDORRA | Signature | 06/09/1952 | |
| ANDORRA | Ratification | 22/01/1953 | |
| ARGENTINA | Signature | 06/09/1952 | |
| ARGENTINA | Ratification | 13/11/1957 | |
| AUSTRALIA | Signature | 06/09/1952 | |
| AUSTRALIA | Ratification | 01/02/1969 | |
| AUSTRIA | Signature | 06/09/1952 | |
| AUSTRIA | Ratification | 02/04/1957 | |
| AZERBAIJAN | Declaration | 07/04/1997 | |
| Bahamas | Extension | 26/04/1963 | 26/07/1963 |
| BAHAMAS | Succession | 13/07/1976 | |
| BANGLADESH | Accession | 05/08/1975 | |
| BARBADOS | Accession | 18/03/1983 | 08/05/1983 |
| Bechuanaland | Extension | | 08/05/1966 |
| BELARUS | Succession | 29/03/1994 | |
| BELGIUM | Accession | 31/12/1952 | 31/05/1960 |
| BELIZE | Succession | 01/12/1982 | |
| Bermuda | Extension | 04/02/1963 | 04/05/1963 |
| BOLIVIA | Accession | 22/12/1989 | 22/03/1990 |
| BOSNIA AND HERZEGOVINA | Succession | 12/07/1993 | |
| BRAZIL | Signature | 06/09/1952 | |
| BRAZIL | Ratification | 13/10/1959 | |
| British Guiana | Extension | 15/03/1966 | 15/06/1966 |
| British Honduras | Extension | | 19/10/1966 |
| British Virgin Islands | Extension | 26/04/1963 | 26/07/1963 |
| BULGARIA | Accession | 07/06/1975 | |
| CAMBODIA | Accession | 03/08/1953 | |
| CAMEROON | Accession | 01/02/1973 | 01/05/1973 |
| CANADA | Signature | 06/09/1952 | |
| CANADA | Ratification | 10/05/1962 | |
| Cayman Islands | Extension | 11/03/1966 | 11/06/1966 |
| CHILE | Signature | 06/09/1952 | |
| CHILE | Ratification | 18/01/1955 | |
| CHINA | Accession | 30/07/1992 | 30/10/1992 |
| COLOMBIA | Accession | 18/03/1976 | 18/06/1976 |
| Cook Islands | Extension | 11/06/1964 | |
| COSTA RICA | Accession | 07/12/1954 | |
| CUBA | Signature | 06/09/1952 | |
| CUBA | Ratification | 18/03/1957 | |
| CYPRUS | Accession | 19/09/1990 | 19/12/1990 |
| CZECH REPUBLIC | Succession | 26/03/1993 | 01/01/1993 |
| CZECHOSLOVAKIA | Accession | 06/10/1959 | |
| DENMARK | Signature | 06/09/1952 | |
| DENMARK | Ratification | 09/11/1961 | |
| DOMINICAN REPUBLIC | Accession | 08/02/1983 | 08/05/1988 |
| ECUADOR | Accession | 05/03/1957 | |
| EL SALVADOR | Accession | 29/12/1978 | 29/03/1979 |
| Falkland Islands | Extension | 29/10/1963 | 29/01/1964 |
| Fiji | Extension | 29/11/1961 | 01/03/1962 |
| FIJI | Succession | 13/12/1971 | |
| FINLAND | Signature | 06/09/1952 | |
| FINLAND | Ratification | 16/01/1963 | 16/04/1963 |
| FRANCE | Signature | 06/09/1952 | |
| FRANCE | Ratification | 14/10/1955 | |
| GERMAN DEMOCRATIC REPUBLIC | Accession | 05/07/1973 | 05/10/1973 |
| GERMANY FEDERAL REPUBLIC | Signature | 06/09/1952 | |
| GERMANY FEDERAL REPUBLIC | Declaration | 06/09/1952 | |
| GERMANY FEDERAL REPUBLIC | Ratification | 03/06/1955 | |
| GHANA | Accession | 22/05/1962 | |
| Gibraltar | Extension | 29/11/1961 | 01/03/1962 |
| GREECE | Accession | 24/05/1963 | |
| Grenada | Extension | 15/02/1966 | 15/05/1966 |
| Guam | Extension | 17/05/1957 | |
| GUATEMALA | Signature | 06/09/1952 | |
| GUATEMALA | Ratification | 28/07/1964 | |
| GUINEA | Accession | 13/11/1981 | |
| HAITI | Signature | 06/09/1952 | |
| HAITI | Ratification | 01/09/1954 | |
| Hawaii | Extension | 06/12/1954 | |
| HONDURAS | Signature | 06/09/1952 | |
| Hong Kong | Extension | | 02/08/1973 |
| HUNGARY | Accession | 23/10/1970 | |
| ICELAND | Signature | 18/09/1956 | |
| INDIA | Signature | 06/09/1952 | |
| INDIA | Ratification | 21/10/1957 | |
| IRELAND, REPUBLIC OF | Signature | 06/09/1952 | |
| IRELAND, REPUBLIC OF | Ratification | 20/10/1958 | |
| Isle of Man | Extension | 29/11/1961 | 01/03/1962 |
| ISRAEL | Signature | 16/12/1952 | |
| ISRAEL | Ratification | 06/04/1955 | |
| ITALY | Signature | 06/09/1952 | |
| ITALY | Ratification | 24/10/1956 | |
| JAPAN | Signature | 03/01/1953 | |
| JAPAN | Ratification | 28/01/1956 | |
| KAZAKHSTAN | Succession | 06/08/1992 | 06/12/1952 |
| Kenya | Extension | | 29/01/1964 |
| KENYA | Succession | 07/06/1966 | |
| LAOS | Accession | 19/08/1954 | |
| LEBANON | Accession | 17/07/1959 | |
| LIBERIA | Signature | 06/09/1952 | |
| LIBERIA | Ratification | 27/04/1956 | |
| LIECHTENSTEIN | Accession | 22/10/1958 | |
| LUXEMBOURG | Signature | 06/09/1952 | |
| LUXEMBOURG | Ratification | 15/07/1955 | |
| MALAWI | Accession | 26/07/1965 | |
| MALTA | Succession | 19/08/1968 | |
| MAURITIUS | Succession | | 12/03/1968 |
| Mauritius | Extension | | 06/01/1965 |
| MEXICO | Signature | 06/09/1952 | |
| MEXICO | Ratification | 12/02/1957 | |
| MONACO | Signature | 06/09/1952 | |
| MONACO | Ratification | 16/06/1955 | |
| Montserrat | Extension | | 08/02/1966 |
| MOROCCO | Accession | 08/02/1972 | |
| NETHERLANDS THE | Signature | 06/09/1952 | |
| NETHERLANDS THE | Ratification | 22/03/1967 | |
| NEW ZEALAND | Accession | 11/06/1964 | |
| NICARAGUA | Signature | 06/09/1952 | |
| NICARAGUA | Ratification | 16/05/1961 | |
| NIGERIA | Accession | 14/11/1961 | |
| Niue Island | Extension | 11/06/1964 | |
| North Borneo | Extension | 04/02/1963 | 04/05/1963 |
| NORWAY | Signature | 06/09/1952 | |
| NORWAY | Ratification | 23/10/1962 | |
| PAKISTAN | Accession | 28/04/1954 | |
| PANAMA | Accession | 17/07/1962 | |
| Panama Canal Zone | Extension | 06/12/1954 | |
| Panama Canal Zone | Statement | 09/12/1957 | |
| PARAGUAY | Accession | 11/12/1961 | |
| PERU | Signature | 02/12/1952 | |
| PERU | Ratification | 16/07/1963 | |
| PHILIPPINES | Accession | 19/08/1955 | |
| PHILIPPINES | Withdrawal | 14/11/1955 | |
| POLAND | Accession | 09/12/1976 | 09/03/1977 |
| PORTUGAL | Signature | 06/09/1952 | |
| PORTUGAL | Ratification | 25/09/1956 | |
| Puerto Rico | Extension | 06/12/1954 | |
| RWANDA | Accession | 10/08/1989 | |
| SALVADOR | Signature | 06/09/1952 | |
| SAN MARINO | Signature | 06/09/1952 | |
| Sarawak | Extension | 29/11/1961 | 01/03/1962 |
| SENEGAL | Accession | 09/04/1974 | 10/07/1974 |
| Seychelles | Extension | | 29/01/1964 |
| SEYCHELLES | Extension | 29/10/1963 | 29/01/1964 |
| SLOVAK REPUBLIC | Succession | 31/03/1993 | 01/01/1993 |
| SLOVENIA | Succession | 28/10/1992 | |
| SOVIET UNION | Accession | 27/02/1973 | 27/05/1973 |
| SPAIN | Signature | 06/09/1952 | |
| SPAIN | Ratification | 27/10/1954 | |
| SRI LANKA | Accession | 25/10/1983 | 25/01/1984 |
| St Helena | Extension | 29/10/1963 | 29/01/1964 |
| St Lucia | Extension | 08/02/1966 | 08/05/1966 |
| St Vincent | Signature | 10/11/1967 | |
| ST VINCENT AND THE GRENADINES | Accession | 22/01/1985 | |
| SWEDEN | Signature | 06/09/1952 | |
| SWEDEN | Ratification | 01/04/1961 | |
| SWITZERLAND | Signature | 06/09/1952 | |
| SWITZERLAND | Ratification | 30/12/1955 | |
| TAJIKISTAN | Succession | 11/08/1992 | |
| Tokelau Islands | Extension | 11/06/1964 | |
| TUNISIA | Accession | 19/03/1969 | |
| UKRAINE | Succession | 17/01/1994 | |
| UNITED KINGDOM | Signature | 06/09/1952 | |
| UNITED KINGDOM | Ratification | 27/06/1957 | |
| UNITED STATES OF AMERICA | Signature | 06/09/1952 | |
| UNITED STATES OF AMERICA | Ratification | 06/12/1954 | |
| UNITED STATES OF AMERICA | Statement | 09/12/1957 | |
| URUGUAY | Signature | 06/09/1952 | |
| URUGUAY | Ratification | 12/01/1993 | 12/04/1993 |
| VATICAN CITY | Signature | 06/09/1952 | |
| VATICAN CITY | Ratification | 05/07/1955 | |
| VENEZUELA | Accession | 30/06/1966 | |
| Virgin Islands | Extension | 06/12/1954 | |
| YUGOSLAVIA, FEDERAL REPUBLIC OF | Accession | 11/09/2001 | 27/04/1992 |
| ZAMBIA | Accession | 01/03/1965 | |
| Zanzibar | Extension | 04/02/1963 | 04/05/1963 |