| Country | Action | Action Date | Effective Date |
|---|
| AUSTRALIA | Signature | 06/02/1947 | |
| AUSTRALIA | Acceptance | 16/04/1947 | |
| COOK ISLANDS | Accession | | 14/10/1980 |
| FIJI | Accession | 30/04/1971 | |
| FRANCE | Signature | 06/02/1947 | |
| FRANCE | Acceptance | 22/07/1948 | |
| NAURU | Accession | 24/07/1969 | |
| NETHERLANDS THE | Signature | 06/02/1947 | |
| NETHERLANDS THE | Acceptance | 29/07/1948 | |
| NETHERLANDS THE | Withdrawal | 21/08/1962 | |
| NEW ZEALAND | Signature | 06/02/1947 | |
| NEW ZEALAND | Acceptance | 26/02/1947 | |
| NIUE | Accession | | 13/10/1980 |
| PAPUA NEW GUINEA | Accession | | 25/09/1975 |
| SOLOMON ISLANDS | Accession | 21/11/1978 | |
| TUVALU | Accession | 17/11/1978 | |
| UNITED KINGDOM | Signature | 06/02/1947 | |
| UNITED KINGDOM | Ratification | 25/06/1947 | |
| UNITED KINGDOM | Acceptance | 25/06/1947 | |
| UNITED KINGDOM | Withdrawal | 01/01/1995 | |
| UNITED STATES OF AMERICA | Signature | 06/02/1947 | |
| UNITED STATES OF AMERICA | Acceptance | 16/02/1948 | |
| WESTERN SAMOA | Accession | 17/07/1965 | |