| Country | Action | Action Date | Effective Date |
|---|
| ALGERIA | Accession | 19/10/1962 | |
| Anguilla | Decision Resvd. | 20/08/1963 | |
| Bermuda | Decision Resvd. | 04/02/1963 | |
| British Virgin Islands | Decision Resvd. | 22/08/1966 | |
| BULGARIA | Signature | 23/06/1934 | |
| BULGARIA | Ratification | 29/12/1949 | |
| CYPRUS | Accession | 08/10/1965 | 08/10/1966 |
| CZECHOSLOVAKIA | Signature | 23/06/1934 | |
| CZECHOSLOVAKIA | Ratification | 12/06/1950 | |
| CZECHOSLOVAKIA | Denunciation | 07/06/1974 | 07/06/1975 |
| DJIBOUTI | Accession | 03/08/1978 | |
| Dominica | Decision Resvd. | 03/08/1964 | |
| Falkland Islands | Decision Resvd. | 08/05/1963 | |
| FRANCE | Signature | 23/06/1934 | |
| FRANCE | Ratification | 21/02/1949 | |
| Gibraltar | Extension | 11/11/1964 | |
| Guernsey | Extension | 29/04/1936 | |
| Hong Kong | Decision Resvd. | 04/02/1963 | |
| IRELAND, REPUBLIC OF | Signature | 23/06/1934 | |
| IRELAND, REPUBLIC OF | Ratification | 10/06/1937 | |
| Isle of Man | Extension | 29/04/1936 | |
| ITALY | Signature | 23/06/1934 | |
| ITALY | Ratification | 22/10/1952 | |
| Jersey | Extension | 29/04/1936 | |
| MALTA | Accession | 21/05/1965 | |
| Montserrat | Extension | 04/02/1963 | |
| NETHERLANDS THE | Accession | 17/01/1966 | |
| NEW ZEALAND | Signature | 23/06/1934 | |
| NEW ZEALAND | Ratification | 29/03/1938 | |
| NORWAY | Signature | 23/06/1934 | |
| NORWAY | Ratification | 20/05/1957 | |
| PERU | Signature | 23/06/1934 | |
| PERU | Ratification | 04/04/1962 | |
| Seychelles | Decision Resvd. | 08/02/1965 | |
| SPAIN | Signature | 23/06/1934 | |
| SPAIN | Ratification | 05/05/1971 | |
| St Helena | Decision Resvd. | 08/02/1965 | |
| SWITZERLAND | Signature | 23/06/1934 | |
| SWITZERLAND | Ratification | 14/06/1939 | |
| UNITED KINGDOM | Signature | 23/06/1934 | |
| UNITED KINGDOM | Ratification | 29/04/1936 | |