| Country | Action | Action Date | Effective Date |
|---|---|---|---|
| ANGOLA | Accession | 22/04/1994 | 11/11/1975 |
| AUSTRALIA | Signature | 24/03/1948 | |
| BAHRAIN | Accession | 17/01/1994 | 15/08/1971 |
| BANGLADESH | Accession | 16/12/1972 | |
| BELGIUM | Signature | 24/03/1948 | |
| BELIZE | Accession | 07/10/1983 | 21/09/1981 |
| BOLIVIA | Accession | 09/08/1990 | 08/09/1990 |
| BRAZIL | Signature | 24/03/1948 | |
| BRUNEI DARUSSALAM | Succession | 03/01/1994 | 31/12/1983 |
| BURMA | Signature | 24/03/1948 | |
| CANADA | Signature | 24/03/1948 | |
| CEYLON | Signature | 24/03/1948 | |
| CHILE | Signature | 24/03/1948 | |
| COSTA RICA | Accession | 25/10/1990 | 24/11/1990 |
| CUBA | Signature | 24/03/1948 | |
| CZECH REPUBLIC | Participation | 16/03/1993 | 15/04/1993 |
| CZECHOSLOVAKIA | Signature | 24/03/1948 | |
| DJIBOUTI | Succession | 17/04/1995 | 16/12/1995 |
| DOMINICA, COMMONWEALTH OF | Succession | 20/04/1993 | 03/11/1978 |
| EL SALVADOR | Accession | 22/05/1991 | |
| FRANCE | Signature | 24/03/1948 | |
| GRENADA | Succession | 09/02/1994 | 07/02/1974 |
| GUATEMALA | Accession | 10/09/1991 | 10/10/1991 |
| GUINEA BISSAU | Succession | 22/04/1994 | 10/09/1974 |
| HONDURAS | Participation | 11/03/1994 | 10/04/1994 |
| HUNGARY | Accession | 09/09/1973 | |
| INDIA | Signature | 24/03/1948 | |
| LEBANON | Signature | 24/03/1948 | |
| LESOTHO | Succession | 08/01/1988 | 04/10/1966 |
| LIECHTENSTEIN | Accession | 22/04/1994 | 29/03/1994 |
| LUXEMBOURG | Signature | 24/03/1948 | |
| MACAU | Succession | 11/01/1991 | 11/01/1991 |
| MALI | Succession | 11/01/1993 | 20/06/1960 |
| MOROCCO | Accession | 17/06/1987 | |
| MOZAMBIQUE | Succession | 27/07/1992 | 25/06/1975 |
| NAMIBIA | Succession | 15/09/1992 | 21/03/1990 |
| NEW ZEALAND | Signature | 24/03/1948 | |
| NORWAY | Signature | 24/03/1948 | |
| PAKISTAN | Signature | 24/03/1948 | |
| PAPUA NEW GUINEA | Succession | 04/08/1975 | 03/09/1975 |
| PAPUA NEW GUINEA | Succession | 17/04/1995 | 16/12/1954 |
| PARAGUAY | Participation | 07/12/1993 | 06/01/1994 |
| QATAR | Accession | 22/04/1994 | 03/09/1971 |
| SAINT LUCIA | Succession | 13/04/1993 | 22/02/1979 |
| SINGAPORE | Succession | 08/10/1973 | 09/08/1965 |
| SLOVAK REPUBLIC | Participation | 16/03/1993 | 01/01/1993 |
| SLOVENIA | Participation | 30/09/1994 | 30/10/1994 |
| SOLOMON ISLANDS | Succession | 28/12/1994 | 07/07/1978 |
| SOUTH AFRICA | Signature | 16/02/1949 | |
| Southern Rhodesia | Signature | 09/05/1949 | |
| ST KITTS AND NEVIS | Accession | 22/04/1994 | 19/09/1983 |
| ST VINCENT AND THE GRENADINES | Succession | 18/05/1993 | 27/10/1979 |
| SURINAME | Succession | 25/11/1975 | 25/11/1975 |
| SWAZILAND | Succession | 28/02/1993 | 06/09/1968 |
| SYRIA | Signature | 24/03/1948 | |
| TUNISIA | Accession | 20/07/1990 | 19/08/1990 |
| UNITED ARAB EMIRATES | Succession | 08/03/1994 | 01/12/1971 |
| UNITED KINGDOM | Signature | 24/03/1948 | |
| UNITED STATES OF AMERICA | Signature | 24/03/1948 | |
| VENEZUELA | Accession | 31/08/1990 |