| Country | Action | Action Date | Effective Date |
|---|---|---|---|
| BULGARIA | Ratification | 29/12/1949 | |
| BULGARIA | Denunciation | 23/04/1980 | 23/04/1981 |
| BYELORUSSIA S S R | Ratification | 06/11/1956 | |
| CUBA | Ratification | 07/09/1954 | |
| ITALY | Ratification | 22/10/1952 | |
| ITALY | Denunciation | 28/07/1981 | |
| LUXEMBOURG | Ratification | 03/03/1958 | |
| NEW ZEALAND | Ratification | 08/07/1947 | |
| NEW ZEALAND | Denunciation | 11/07/1961 | |
| PARAGUAY | Ratification | 21/03/1966 | |
| SOVIET UNION | Ratification | 10/08/1956 | |
| SPAIN | Ratification | 05/05/1971 | |
| UKRAINE | Ratification | 14/09/1956 | |
| UNITED KINGDOM | |||
| URUGUAY | Ratification | 18/03/1954 |