| Country | Action | Action Date | Effective Date |
|---|
| Alaska | Extension | 06/12/1954 | |
| Algeria | Extension | 14/10/1955 | |
| 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 | 24/07/1969 | |
| AUSTRIA | Signature | 06/09/1952 | |
| AUSTRIA | Ratification | 02/04/1957 | |
| BANGLADESH | Accession | 05/05/1975 | 10/07/1974 |
| BELGIUM | Signature | 31/12/1952 | |
| BELGIUM | Ratification | 31/05/1960 | |
| BELGIUM | Declaration | 31/05/1960 | |
| BOSNIA AND HERZEGOVINA | Succession | 12/07/1993 | |
| BRAZIL | Signature | 06/09/1952 | |
| BRAZIL | Ratification | 13/10/1959 | |
| CAMBODIA | Accession | 03/08/1953 | |
| CANADA | Signature | 06/09/1952 | |
| Canal Zone | Extension | 06/12/1954 | |
| COSTA RICA | Accession | 07/12/1954 | |
| CUBA | Signature | 06/09/1952 | |
| CUBA | Ratification | 18/03/1957 | |
| DENMARK | Signature | 06/09/1952 | |
| DENMARK | Ratification | 09/11/1961 | |
| ECUADOR | Accession | 05/03/1957 | |
| EL SALVADOR | Accession | 29/12/1978 | 29/03/1979 |
| FINLAND | Accession | 16/01/1963 | |
| FRANCE | Signature | 06/09/1952 | |
| FRANCE | Ratification | 14/10/1955 | |
| French Guiana | Extension | 14/10/1955 | |
| GERMANY FEDERAL REPUBLIC | Signature | 06/09/1952 | |
| GERMANY FEDERAL REPUBLIC | Ratification | 03/06/1955 | |
| GERMANY FEDERAL REPUBLIC | Declaration | 16/09/1955 | |
| GHANA | Accession | 22/05/1962 | |
| GREECE | Accession | 24/05/1963 | |
| Guadeloupe | Extension | 14/10/1955 | |
| GUATEMALA | Signature | 06/09/1952 | |
| GUATEMALA | Ratification | 28/07/1964 | |
| GUINEA | Accession | 13/08/1981 | 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 | |
| INDIA | Signature | 06/09/1952 | |
| INDIA | Ratification | 21/10/1957 | |
| IRELAND, REPUBLIC OF | Signature | 06/09/1952 | |
| IRELAND, REPUBLIC OF | Ratification | 20/10/1958 | |
| ISRAEL | Signature | 16/12/1952 | |
| ISRAEL | Ratification | 06/04/1955 | |
| ITALY | Signature | 06/09/1952 | |
| ITALY | Ratification | 19/12/1966 | |
| JAPAN | Signature | 31/12/1952 | |
| JAPAN | Ratification | 28/01/1956 | |
| KENYA | Accession | 07/06/1966 | |
| Land Berlin | Extension | 16/09/1955 | |
| LAOS | Accession | 19/08/1954 | |
| LEBANON | Accession | 17/07/1959 | |
| LIBERIA | Signature | 27/04/1956 | |
| LIECHTENSTEIN | Accession | 22/10/1958 | |
| LUXEMBOURG | Signature | 06/09/1952 | |
| LUXEMBOURG | Ratification | 15/07/1955 | |
| Martinique | Extension | 14/10/1955 | |
| MAURITIUS | Succession | 12/03/1968 | |
| MONACO | Signature | 06/09/1952 | |
| MONACO | Ratification | 16/06/1955 | |
| MOROCCO | Accession | 08/02/1972 | 08/05/1972 |
| NETHERLANDS THE | Accession | 22/03/1967 | |
| NEW ZEALAND | Accession | 11/06/1964 | |
| NICARAGUA | Signature | 06/09/1952 | |
| NICARAGUA | Ratification | 16/05/1961 | |
| NORWAY | Signature | 06/09/1962 | |
| NORWAY | Ratification | 23/10/1962 | |
| PAKISTAN | Accession | 28/04/1954 | |
| Panama | Extension | 06/12/1954 | |
| PANAMA | Accession | 17/07/1962 | |
| PARAGUAY | Accession | 11/12/1961 | |
| PERU | Signature | 02/12/1952 | |
| PHILIPPINES | Accession | 19/08/1955 | |
| PHILIPPINES | Withdrawal | 16/11/1955 | |
| POLAND | Accession | 09/12/1976 | 09/03/1977 |
| PORTUGAL | Signature | 06/09/1952 | |
| PORTUGAL | Ratification | 25/09/1956 | |
| Puerto Rico | Extension | 06/12/1954 | |
| Reunion | Extension | 14/10/1955 | |
| Ruanda Urundi | Extension | 24/01/1961 | |
| RWANDA | Accession | 10/11/1989 | |
| SALVADOR | Signature | 06/09/1952 | |
| SAN MARINO | Signature | 06/09/1952 | |
| SENEGAL | Accession | 09/04/1974 | 10/07/1974 |
| SLOVENIA | Succession | 28/10/1992 | |
| SRI LANKA | Accession | 27/07/1988 | 27/07/1988 |
| SWEDEN | Signature | 06/09/1952 | |
| SWEDEN | Ratification | 01/04/1961 | |
| SWITZERLAND | Signature | 06/09/1952 | |
| SWITZERLAND | Ratification | 30/12/1955 | |
| TUNISIA | Accession | 19/03/1969 | |
| UNITED KINGDOM | Signature | 06/09/1952 | |
| UNITED KINGDOM | Ratification | 27/06/1957 | |
| UNITED KINGDOM | Declaration | 02/08/1973 | |
| UNITED STATES OF AMERICA | Signature | 06/09/1952 | |
| UNITED STATES OF AMERICA | Ratification | 06/12/1954 | |
| UNITED STATES OF AMERICA | Declaration | 06/12/1954 | |
| URUGUAY | Signature | 06/09/1952 | |
| URUGUAY | Ratification | 12/01/1993 | 12/04/1933 |
| VATICAN CITY | Signature | 06/12/1952 | |
| VATICAN CITY | Ratification | 05/07/1955 | |
| VENEZUELA | Accession | 30/06/1966 | |
| Virgin Islands | Extension | 06/12/1954 | |
| YUGOSLAVIA | Signature | 06/09/1952 | |
| YUGOSLAVIA | Ratification | 11/02/1966 | |