| Date | |
|---|---|
| Accession | April 21, 1953 |
| Entry into force | July 8, 1953 |
Act(s) |
Article(s) | Signature | Instrument | Entry into Force |
|---|---|---|---|---|
| Additional Act of Stockholm (1967) | July 14, 1967 | Ratification: January 20, 1975 | April 24, 1975 | |
| Lisbon Act (1958) | October 31, 1958 | Accession: June 18, 1965 | August 21, 1965 | |
| London Act (1934) | Accession: April 21, 1953 | July 8, 1953 |