| Country | Action | Action Date | Effective Date |
|---|
| AUSTRALIA | Signature | 27/02/1956 | 02/07/1956 |
| BANGLADESH | Adherence | 04/12/1974 | |
| BURMA | Adherence | 04/11/1959 | |
| CAMBODIA | Adherence | 27/01/1969 | |
| CEYLON | Signature | 27/02/1956 | 02/07/1956 |
| Cook Islands | Extension | 17/12/1975 | |
| FIJI | Adherence | 16/12/1970 | |
| FRANCE | Adherence | 20/08/1957 | |
| INDIA | Signature | 02/07/1956 | 02/07/1956 |
| INDONESIA | Signature | 28/06/1956 | |
| INDONESIA | Objection | 23/07/1957 | |
| INDONESIA | Ratification | 21/12/1967 | |
| KOREA REPUBLIC OF | Adherence | 04/11/1981 | 04/11/1981 |
| LAOS | Signature | 25/05/1956 | |
| LAOS | Ratification | 17/03/1960 | |
| MALAYSIA | Adherence | 20/11/1957 | |
| NEPAL | Adherence | 12/08/1965 | |
| New Guinea | Signature | 25/06/1956 | |
| New Guinea | Ratification | 19/07/1957 | |
| New Guinea | Withdrawal | 01/10/1962 | |
| NEW ZEALAND | Adherence | 17/12/1975 | |
| Niue Island | Extension | 17/12/1975 | |
| PAKISTAN | Adherence | 08/01/1958 | |
| PAPUA NEW GUINEA | Adherence | 01/06/1976 | |
| PHILIPPINES | Adherence | 11/06/1962 | |
| PORTUGAL | Signature | 02/06/1956 | 02/07/1956 |
| SOLOMON ISLANDS | Adherence | 20/06/1979 | |
| THAILAND | Adherence | 26/11/1956 | |
| TONGA | Adherence | 05/11/1981 | 05/11/1981 |
| UNITED KINGDOM | Signature | 29/03/1956 | |
| UNITED KINGDOM | Ratification | 03/12/1956 | |
| UNITED KINGDOM | Denunciation | 01/09/2008 | 01/09/2009 |
| VIETNAM | Signature | 02/07/1956 | 02/07/1956 |
| WESTERN SAMOA | Adherence | 23/12/1971 | |