| Country | Action | Action Date | Effective Date |
|---|---|---|---|
| Antilles | Extension | 01/01/1986 | 01/01/1986 |
| Antilles And Suriname | Extension | 09/06/1971 | |
| Aruba | Extension | 01/01/1986 | 01/01/1986 |
| BELGIUM | Accession | 23/12/1949 | |
| DENMARK | Accession | 25/03/1952 | |
| ESTONIA | Accession | 21/10/1991 | 19/01/1992 |
| LUXEMBOURG | Accession | 28/06/1961 | |
| NETHERLANDS THE | Accession | 09/06/1971 | |
| NETHERLANDS THE | Declaration | 09/06/1971 | |
| NETHERLANDS THE | Extension | 01/01/1986 | 01/01/1986 |
| NORWAY | Accession | 16/07/1951 | |
| SWEDEN | Accession | 22/06/1950 | |
| UNITED KINGDOM | Declaration | 28/04/1949 | |
| UPPER VOLTA | Accession | 27/03/1962 |