| Country | Action | Action Date | Effective Date |
|---|
| Antilles | Extension | 01/01/1986 | |
| Aruba | Extension | 01/01/1986 | |
| AUSTRALIA | Signature | 10/10/1949 | |
| AUSTRALIA | Ratification | 28/04/1950 | 28/05/1950 |
| AUSTRALIA | Extension | 04/08/1975 | 03/09/1975 |
| BELGIUM | Signature | 25/11/1949 | |
| BELGIUM | Ratification | 23/12/1949 | 01/01/1950 |
| BRAZIL | Signature | 30/11/1949 | |
| BRAZIL | Ratification | 27/12/1951 | 26/01/1952 |
| BURMA | Signature | 01/11/1949 | |
| CANADA | Signature | 10/10/1949 | |
| CANADA | Ratification | 07/11/1949 | 01/01/1950 |
| CEYLON | Signature | 29/11/1949 | |
| CEYLON | Ratification | 01/02/1950 | 03/03/1950 |
| CHILE | Signature | 30/11/1949 | |
| CHILE | Ratification | 28/04/1950 | 26/05/1950 |
| CHINA | Signature | 30/12/1949 | |
| CUBA | Accession | 27/02/1951 | 29/03/1951 |
| CZECHOSLOVAKIA | Signature | 30/11/1949 | |
| CZECHOSLOVAKIA | Ratification | 12/01/1950 | |
| DENMARK | Accession | 28/04/1950 | 28/05/1950 |
| DENMARK | Application | 18/04/1952 | |
| DOMINICAN REPUBLIC | Accession | 19/04/1950 | 19/05/1950 |
| Faroe Islands | Extension | 18/04/1952 | |
| FINLAND | Accession | 26/04/1950 | 25/05/1950 |
| FRANCE | Signature | 10/10/1949 | |
| FRANCE | Ratification | 19/04/1950 | 19/04/1950 |
| GREECE | Accession | 01/03/1950 | 07/02/1950 |
| HAITI | Accession | 10/10/1949 | 01/01/1950 |
| INDIA | Signature | 29/11/1949 | |
| INDIA | Ratification | 21/04/1950 | 21/05/1950 |
| ITALY | Accession | 30/04/1950 | 30/05/1950 |
| LEBANON | Signature | 10/10/1949 | |
| LIBERIA | Accession | 28/11/1949 | 20/05/1950 |
| LUXEMBOURG | Signature | 18/11/1949 | |
| LUXEMBOURG | Ratification | 23/12/1949 | 01/01/1950 |
| NETHERLANDS THE | Signature | 10/10/1949 | |
| NETHERLANDS THE | Ratification | 23/12/1949 | 01/01/1950 |
| NETHERLANDS THE | Declaration | 01/01/1986 | |
| NEW ZEALAND | Signature | 30/11/1949 | |
| NEW ZEALAND | Ratification | 28/04/1950 | 28/05/1950 |
| NICARAGUA | Accession | 28/04/1950 | 28/05/1950 |
| NORWAY | Signature | 25/11/1949 | |
| NORWAY | Ratification | 29/06/1950 | 29/07/1950 |
| PAKISTAN | Signature | 12/10/1949 | |
| PAKISTAN | Ratification | 19/04/1950 | 19/05/1950 |
| Papua New Guinea | Extension | 04/08/1975 | 03/09/1975 |
| SOUTH AFRICA | Signature | 29/11/1949 | |
| SOUTH AFRICA | Ratification | 04/04/1950 | 04/05/1950 |
| Southern Rhodesia | Signature | 25/10/1949 | |
| SWEDEN | Accession | 31/03/1950 | 30/04/1950 |
| SYRIA | Signature | 16/11/1949 | |
| UNITED KINGDOM | Signature | 10/10/1949 | |
| UNITED KINGDOM | Ratification | 18/04/1950 | 01/01/1950 |
| UNITED STATES OF AMERICA | Signature | 10/10/1949 | |
| UNITED STATES OF AMERICA | Ratification | 01/01/1950 | |
| URUGUAY | Accession | 16/11/1953 | 16/12/1953 |