| Country | Action | Action Date | Effective Date |
|---|---|---|---|
| ARGENTINA | Accession | 05/04/1972 | |
| AUSTRALIA | Accession | 20/03/1973 | |
| AUSTRIA | Accession | 10/08/1948 | |
| BELGIUM | Accession | 20/04/1940 | |
| BOLIVIA | Accession | 22/04/1940 | |
| BRAZIL | Withdrawal | 18/06/1970 | |
| BRAZIL | Accession | 18/06/1940 | |
| BULGARIA | Accession | 24/06/1940 | |
| CANADA | Accession | 02/03/1968 | |
| CHILE | Withdrawal | 02/05/1969 | |
| CHILE | Accession | 02/05/1951 | |
| CHILE | Re-Accession | 26/04/1982 | 12/05/1982 |
| COLOMBIA | Accession | 26/04/1940 | |
| CROATIA | Accession | 01/01/1996 | |
| CUBA | Accession | 16/06/1940 | |
| CZECHOSLOVAKIA | Accession | 29/05/1968 | |
| DENMARK | Accession | 05/06/1940 | |
| ECUADOR | Withdrawal | 21/08/1970 | |
| ECUADOR | Accession | 13/08/1940 | |
| FINLAND | Accession | 20/04/1940 | |
| FRANCE | Accession | 03/08/1948 | |
| GERMAN DEMOCRATIC REPUBLIC | Accession | 09/02/1973 | |
| GERMANY FEDERAL REPUBLIC | Accession | 24/04/1940 | |
| GREECE | Accession | 20/04/1940 | |
| HUNGARY | Accession | 20/04/1940 | |
| INDIA | Accession | 26/09/1950 | |
| IRAN | Accession | 04/04/1951 | |
| IRAQ | Accession | 03/05/1973 | |
| IRELAND | Accession | 18/04/1940 | |
| ISRAEL | Accession | 05/04/1954 | |
| ITALY | Accession | 20/04/1940 | |
| JAPAN | Accession | 19/12/1953 | |
| LEBANON | Withdrawal | 08/07/1964 | |
| LEBANON | Accession | 08/07/1958 | |
| LUXEMBOURG | Withdrawal | 04/05/1969 | |
| LUXEMBOURG | Accession | 05/05/1940 | |
| LUXEMBOURG | Re-Accession | 10/09/1973 | |
| MALTA | Withdrawal | 04/06/1976 | |
| MALTA | Accession | 05/06/1970 | |
| MEXICO | Accession | 06/05/1940 | |
| NETHERLANDS THE | Extension | 01/01/1986 | |
| NETHERLANDS THE | Accession | 14/04/1940 | |
| NICARAGUA | Accession | 20/04/1940 | |
| NIGERIA | Accession | 29/10/1964 | |
| NORWAY | Accession | 13/07/1951 | |
| PAKISTAN | Accession | 30/05/1964 | |
| PARAGUAY | Accession | 02/05/1940 | |
| POLAND | Accession | 01/01/1979 | |
| PORTUGAL | Accession | 18/05/1949 | |
| ROMANIA | Accession | 20/04/1940 | |
| SAN MARINO | Accession | 04/02/1945 | |
| SOUTH AFRICA | Accession | 27/04/1971 | |
| SPAIN | Accession | 20/04/1940 | |
| SWEDEN | Accession | 20/04/1940 | |
| SWITZERLAND | Accession | 20/04/1940 | |
| TUNISIA | Accession | 01/01/1980 | |
| TURKEY | Accession | 21/10/1951 | |
| UNITED ARAB REPUBLIC | Accession | 28/07/1951 | |
| UNITED KINGDOM | Signature | 15/03/1940 | |
| UNITED KINGDOM | Ratification | 24/09/1948 | |
| UNITED KINGDOM | Accession | 24/09/1948 | |
| UNITED STATES OF AMERICA | Accession | 13/04/1964 | |
| URUGUAY | Accession | 20/04/1940 | |
| VATICAN CITY | Accession | 19/04/1945 | |
| VENEZUELA | Accession | 09/05/1940 | |
| YUGOSLAVIA | Accession | 20/04/1940 |