| Country | Action | Action Date | Effective Date |
|---|
| ALGERIA | Extension | 21/06/1927 | |
| ALGERIA | Succession | 05/07/1962 | |
| ARGENTINA | Accession | 30/09/1953 | |
| AUSTRALIA | Approval | | 08/08/1978 |
| AUSTRALIA | Notification | 21/09/1977 | |
| AUSTRALIA | Reservation | 21/09/1977 | |
| AUSTRALIA | Accession | 08/08/1978 | |
| AUSTRALIA | Withdrawal Res. | 04/10/1978 | |
| AUSTRIA | Accession | 17/09/1929 | |
| BELGIUM | Accession | 19/09/1961 | |
| BOLIVIA | Accession | 17/03/1993 | |
| BRAZIL | Accession | 13/02/1995 | |
| BULGARIA | Accession | 20/02/1933 | |
| CHILE | Accession | 21/10/1952 | |
| CYPRUS | Accession | 30/07/1962 | |
| CZECH REPUBLIC | Succession | 01/01/1993 | 01/01/1993 |
| CZECHOSLOVAKIA | Accession | 16/03/1937 | |
| DENMARK | Accession | 01/08/1980 | |
| FINLAND | Accession | 23/06/1992 | |
| FRANCE | Signature | 29/11/1924 | |
| FRANCE | Ratification | 21/06/1927 | |
| GEORGIA | Accession | 06/01/1993 | |
| GERMANY FEDERAL REPUBLIC | Accession | 01/04/1929 | |
| GREECE | Signature | 29/11/1924 | |
| GREECE | Ratification | 29/07/1929 | |
| HUNGARY | Signature | 29/11/1924 | |
| HUNGARY | Ratification | 29/10/1927 | |
| ISRAEL | Accession | 10/11/1959 | |
| ITALY | Signature | 29/11/1924 | |
| ITALY | Ratification | 29/12/1933 | |
| LUXEMBOURG | Signature | 29/11/1924 | |
| LUXEMBOURG | Ratification | 24/03/1928 | |
| MEXICO | Accession | 11/06/1969 | |
| MOLDOVA REPUBLIC OF | Accession | 17/06/1992 | |
| MOROCCO | Accession | 18/05/1928 | |
| NETHERLANDS THE | Accession | 21/03/1947 | |
| NETHERLANDS THE | Withdrawal | 05/08/1958 | |
| NETHERLANDS THE | Re-Accession | 20/02/1963 | |
| NEW ZEALAND | Accession | 09/07/1993 | |
| NORWAY | Accession | 25/05/1992 | |
| PERU | Accession | 02/06/1994 | |
| PORTUGAL | Signature | 29/11/1924 | |
| PORTUGAL | Ratification | 29/07/1927 | |
| ROMANIA | Accession | 17/04/1928 | |
| SLOVENIA | Notification | 20/01/1994 | |
| SOUTH AFRICA | Accession | 13/08/1963 | |
| SOVIET UNION | Accession | 02/08/1956 | |
| SPAIN | Signature | 29/11/1924 | |
| SPAIN | Reservation | 29/11/1924 | |
| SPAIN | Ratification | 31/12/1926 | |
| SWEDEN | Accession | 19/03/1992 | |
| SWITZERLAND | Accession | 01/07/1935 | |
| SYRIA | Accession | 25/11/1969 | |
| TUNISIA | Signature | 29/11/1924 | |
| TUNISIA | Ratification | 12/05/1927 | |
| TURKEY | Accession | 01/01/1946 | |
| TURKEY | Withdrawal | 24/07/1961 | |
| UKRAINE S S R | Accession | 02/08/1956 | |
| UNITED KINGDOM | Accession | 23/01/1974 | |
| UNITED STATES OF AMERICA | Accession | 25/01/1984 | 25/07/1984 |
| YUGOSLAVIA | Accession | 29/04/1929 | |