| Country | Action | Action Date | Effective Date |
|---|
| Algeria | Extension | 09/07/1934 | 09/10/1934 |
| Antigua | Extension | 04/11/1926 | |
| ARGENTINA | Signature | 01/12/1924 | |
| AUSTRALIA | Accession | 23/08/1928 | 23/11/1928 |
| AUSTRALIA | Re-Application | 01/11/1953 | |
| Bahamas | Extension | 28/10/1927 | |
| BAHAMAS | Succession | 22/03/1974 | 10/07/1973 |
| Barbados | Extension | 29/03/1950 | 29/06/1950 |
| Belgian Congo | Extension | 17/02/1927 | |
| BELGIUM | Signature | 01/12/1924 | |
| BELGIUM | Ratification | 05/08/1926 | 05/11/1926 |
| BELGIUM | Re-Application | 01/11/1953 | |
| BRAZIL | Accession | 20/02/1955 | 20/05/1955 |
| British Guiana | Extension | 04/11/1926 | 04/02/1927 |
| British Honduras | Extension | 04/11/1926 | |
| British Solomon Islands | Extension | 28/10/1927 | |
| British Solomon Islands | Application | 07/07/1978 | |
| British Solomon Islands | Withdrawal | 17/09/1981 | 17/09/1982 |
| British Virgin Islands | Extension | 04/11/1926 | 04/02/1927 |
| CAMBODIA | Succession | 01/01/1951 | |
| CANADA | Accession | 21/08/1925 | 21/11/1925 |
| CANADA | Re-Application | 01/11/1953 | |
| Ceylon | Extension | 04/11/1926 | |
| CHILE | Accession | 11/06/1934 | 13/06/1935 |
| CUBA | Signature | 01/12/1924 | |
| CYPRUS | Accession | 17/04/1930 | 17/07/1930 |
| DENMARK | Signature | 01/12/1924 | |
| DENMARK | Ratification | 01/05/1928 | 01/08/1928 |
| DENMARK | Re-Application | 01/10/1953 | |
| Dominica | Extension | 04/11/1926 | 04/02/1927 |
| Falkland Islands | Extension | 04/11/1926 | |
| Fiji | Extension | 04/11/1926 | |
| FIJI | Succession | 12/08/1971 | 10/10/1970 |
| FINLAND | Signature | 01/12/1924 | |
| FINLAND | Ratification | 21/04/1926 | 21/07/1926 |
| FINLAND | Re-Application | 01/11/1953 | |
| FRANCE | Signature | 01/12/1924 | |
| FRANCE | Ratification | 23/09/1930 | |
| FRANCE | Re-Application | 01/11/1953 | |
| French Cameroons | Extension | 09/07/1934 | 09/10/1934 |
| French Equatorial Africa | Extension | 09/07/1934 | 09/10/1934 |
| French Guiana | Extension | 09/07/1934 | |
| French India | Extension | 09/07/1934 | 09/10/1934 |
| French Indo-china | Extension | 09/07/1934 | 09/10/1934 |
| French West Africa | Extension | 09/07/1934 | 09/10/1934 |
| GERMAN DEMOCRATIC REPUBLIC | Re-Application | 12/09/1974 | 09/03/1959 |
| GERMANY | Accession | 15/01/1937 | |
| GERMANY FEDERAL REPUBLIC | Accession | 16/04/1937 | 16/07/1937 |
| GERMANY FEDERAL REPUBLIC | Re-Application | 01/11/1953 | |
| GERMANY FEDERAL REPUBLIC | Non-acceptance | 10/01/1977 | |
| Gibraltar | Extension | 04/11/1926 | |
| Gilbert And Ellice Islands | Extension | 28/10/1927 | |
| GREECE | Signature | 01/12/1924 | |
| GREECE | Ratification | 18/05/1926 | 18/08/1926 |
| GREECE | Re-Application | 01/11/1953 | |
| Grenada | Extension | 28/10/1927 | |
| Guadeloupe | Extension | 09/07/1934 | 09/10/1934 |
| Hong Kong | Extension | 21/11/1933 | 21/02/1934 |
| HONG KONG SAR | Application | 04/06/1997 | 01/07/1997 |
| ICELAND | Accession | 20/11/1928 | 20/02/1929 |
| INDIA | Succession | 06/11/1954 | 06/02/1955 |
| IRAQ | Accession | 14/04/1928 | 14/07/1928 |
| IRAQ | Re-Application | 01/11/1953 | |
| IRELAND, REPUBLIC OF | Accession | 18/09/1930 | 18/12/1930 |
| ISRAEL | Accession | 28/11/1950 | 28/02/1951 |
| ITALY | Signature | 01/12/1924 | |
| ITALY | Ratification | 01/09/1928 | 01/12/1928 |
| ITALY | Re-Application | 01/11/1953 | |
| Jamaica | Extension | 28/10/1927 | |
| Land Berlin | Extension | | 01/11/1953 |
| Leeward Islands | Extension | 04/11/1926 | |
| Madagascar | Extension | 09/07/1934 | 09/10/1934 |
| Malay States, Federated | Extension | 08/03/1957 | |
| Martinique | Extension | 09/07/1934 | 09/10/1934 |
| Mauritania | Extension | 09/07/1934 | 09/10/1934 |
| Mauritius | Extension | 04/11/1926 | |
| MAURITIUS | Succession | 20/09/1971 | 12/03/1968 |
| MONACO | Signature | 01/12/1924 | |
| MONACO | Ratification | 17/12/1925 | 17/03/1926 |
| Montserrat | Extension | 04/11/1926 | 04/02/1927 |
| Morocco | Extension | 10/10/1927 | 23/12/1928 |
| Morocco | Extension | 15/08/1952 | 15/11/1952 |
| MOROCCO | Accession | 07/08/1957 | 07/11/1957 |
| NETHERLANDS THE | Accession | 10/10/1930 | 10/01/1931 |
| NETHERLANDS THE | Re-Application | 01/11/1953 | |
| NEW ZEALAND | Accession | 21/08/1925 | 21/11/1925 |
| NEW ZEALAND | Re-Application | 01/11/1953 | |
| North Borneo | Extension | 13/06/1934 | 13/09/1934 |
| NORWAY | Accession | 18/01/1935 | 18/04/1935 |
| NORWAY | Re-Application | 01/11/1953 | |
| PAKISTAN | Accession | 07/06/1956 | 07/09/1956 |
| PAPUA NEW GUINEA | Accession | 30/03/1977 | 30/06/1977 |
| PERU | Signature | 01/12/1924 | |
| POLAND | Accession | 11/12/1931 | 11/03/1932 |
| ROUMANIA | Signature | 01/12/1924 | |
| ROUMANIA | Ratification | 26/12/1927 | 26/03/1928 |
| Seychelles | Extension | 04/11/1926 | |
| SPAIN | Accession | 15/08/1952 | 15/11/1952 |
| St Lucia | Extension | 04/11/1926 | |
| St Vincent | Extension | 04/11/1926 | |
| St. Christopher And Nevis | Extension | 04/11/1926 | 04/02/1927 |
| Straits Settlements | Extension | 04/11/1926 | |
| SWEDEN | Signature | 01/12/1924 | |
| SWEDEN | Ratification | 10/02/1931 | 10/05/1931 |
| Tahiti | Extension | 09/07/1934 | |
| The Gambia | Extension | 28/10/1927 | |
| Trinidad | Extension | 04/11/1926 | |
| Tunis | Extension | 01/12/1924 | |
| TURKEY | Accession | 27/03/1952 | 27/06/1952 |
| Tuvalu | Extension | 28/10/1927 | 28/01/1928 |
| UNITED KINGDOM | Signature | 01/12/1924 | |
| UNITED KINGDOM | Declaration | 01/12/1924 | |
| UNITED KINGDOM | Ratification | 21/08/1925 | 21/11/1925 |
| UNITED KINGDOM | Ratification | 21/08/1925 | |
| UNITED KINGDOM | Re-Application | 01/01/1953 | |
| VIETNAM | Accession | 09/10/1950 | 09/01/1951 |
| YUGOSLAVIA | Accession | 23/05/1957 | 23/08/1957 |