| Country | Action | Action Date | Effective Date |
|---|---|---|---|
| AFGHANISTAN | Signature | 30/10/1956 | |
| Antilles | Extension | 01/01/1986 | |
| ARGENTINA | Signature | 29/04/1958 | |
| Aruba | Extension | 01/01/1986 | |
| AUSTRALIA | Signature | 30/10/1958 | |
| AUSTRALIA | Ratification | 14/05/1963 | |
| BELGIUM | Accession | 06/01/1972 | |
| BOLIVIA | Signature | 17/10/1958 | |
| BOSNIA AND HERZEGOVINA | Succession | 12/01/1994 | 06/03/1992 |
| CAMBODIA | Accession | 18/03/1960 | |
| CANADA | Signature | 29/04/1958 | |
| CEYLON | Signature | 30/10/1958 | |
| COLOMBIA | Signature | 29/04/1958 | |
| COLOMBIA | Ratification | 03/01/1963 | |
| CONGO | Accession | 05/12/2012 | 04/01/2013 |
| COSTA RICA | Signature | 29/04/1958 | |
| CUBA | Signature | 29/04/1958 | |
| DENMARK | Signature | 29/04/1958 | |
| DENMARK | Ratification | 26/09/1968 | |
| DENMARK | Declaration | 26/09/1968 | |
| DOMINICAN REPUBLIC | Signature | 29/04/1958 | |
| DOMINICAN REPUBLIC | Ratification | 11/08/1964 | |
| FIJI | Succession | 25/03/1971 | |
| FINLAND | Signature | 27/10/1958 | |
| FINLAND | Ratification | 16/02/1965 | |
| FRANCE | Signature | 30/10/1958 | |
| FRANCE | Ratification | 18/09/1970 | |
| GHANA | Signature | 29/04/1958 | |
| HAITI | Signature | 29/04/1958 | |
| HAITI | Ratification | 29/03/1960 | |
| ICELAND | Signature | 29/04/1958 | |
| INDONESIA | Signature | 08/05/1958 | |
| IRAN | Signature | 28/05/1958 | |
| IRELAND, REPUBLIC OF | Signature | 02/10/1958 | |
| ISRAEL | Signature | 29/04/1958 | |
| JAMAICA | Succession | 16/04/1964 | |
| KENYA | Accession | 20/06/1969 | |
| LEBANON | Signature | 29/05/1958 | |
| LESOTHO | Succession | 23/10/1973 | |
| LIBERIA | Signature | 27/08/1958 | |
| MALAGASY REPUBLIC | Accession | 31/07/1962 | |
| MALAWI | Accession | 03/11/1965 | |
| MALAYA | Accession | 21/12/1960 | |
| MAURITIUS | Succession | 05/10/1970 | |
| MEXICO | Accession | 02/08/1966 | |
| MONTENEGRO | Succession | 23/10/2006 | 03/06/2006 |
| NEPAL | Signature | 29/04/1958 | |
| NETHERLANDS THE | Signature | 31/10/1958 | |
| NETHERLANDS THE | Ratification | 18/02/1966 | |
| NETHERLANDS THE | Declaration | 01/01/1986 | |
| NEW ZEALAND | Signature | 29/10/1958 | |
| NIGERIA | Succession | 26/06/1961 | |
| PAKISTAN | Signature | 31/10/1958 | |
| PANAMA | Signature | 02/05/1958 | |
| PAPUA NEW GUINEA | Declaration | 12/06/1976 | |
| PORTUGAL | Signature | 28/10/1958 | |
| PORTUGAL | Ratification | 08/01/1963 | |
| SENEGAL | Succession | 25/04/1961 | |
| SENEGAL | Denunciation | 09/06/1971 | 08/07/1971 |
| SIERRA LEONE | Succession | 13/03/1962 | |
| SOLOMON ISLANDS | Succession | 03/09/1981 | |
| SOUTH AFRICA | Accession | 09/04/1963 | |
| SPAIN | Accession | 25/02/1971 | |
| SPAIN | Declaration | 25/02/1971 | |
| SWITZERLAND | Signature | 22/10/1958 | |
| SWITZERLAND | Ratification | 18/05/1966 | |
| THAILAND | Signature | 29/04/1958 | |
| THAILAND | Ratification | 02/07/1958 | |
| TONGA | Succession | 29/06/1971 | |
| TRINIDAD AND TOBAGO | Succession | 11/04/1966 | |
| TUNISIA | Signature | 30/10/1958 | |
| UGANDA | Accession | 14/09/1964 | |
| UNITED KINGDOM | Signature | 09/09/1958 | 14/03/1960 |
| UNITED KINGDOM | Declaration | 14/03/1960 | |
| UNITED KINGDOM | Ratification | 14/03/1960 | |
| UNITED KINGDOM | Declaration | 02/01/1973 | |
| UNITED KINGDOM | Notification | 10/06/1997 | |
| UNITED STATES OF AMERICA | Signature | 15/09/1958 | |
| UNITED STATES OF AMERICA | Ratification | 12/04/1961 | |
| UNITED STATES OF AMERICA | Declaration | 12/04/1961 | |
| UPPER VOLTA | Accession | 04/10/1965 | |
| URUGUAY | Signature | 29/04/1958 | |
| VENEZUELA | Signature | 30/10/1958 | |
| VENEZUELA | Ratification | 10/06/1963 | |
| YUGOSLAVIA, FEDERAL REPUBLIC OF | Succession | 12/03/2001 | 27/04/1992 |