Narcotic Drugs and the 1971 Convention on Psychotropic Substances have schedules of controlled substances. The 1988 United Nations Convention Against Illicit Traffic in Narcotic Drugs and Psychotropic Substances has two tables of controlled precursor chemicals. Drug Supervisory Body The Drug Supervisory Body (sometimes called "Opium Supersiory Body", and in French "Organe de Contrôle") was established under the 1931 Convention to compile estimates of the amount of drugs to be consumed, manufactured, converted, exported, imported, or used by each country. One member of the Body was nominated by the Office international d'hygiène publique (general health advisory council of the League of Nations' Health Organization). The Body should not be confused with the Permanent Central Opium Board established under the 1925 Opium Convention, although both the Body and the Board were merged onto the International Narcotics Control Board when the Single Convention on Narcotic Drugs entered into force in 1968. References External links Ratification status Drug control treaties League of Nations treaties Treaties concluded in 1931 Treaties entered into force in 1933 Treaties of the Kingdom of Afghanistan Treaties of the Albanian Kingdom (1928–1939) Treaties of the United States Treaties of Saudi Arabia Treaties of Argentina Treaties of the First Austrian Republic Treaties of Belgium Treaties of Vargas-era Brazil Treaties of the United Kingdom Treaties of Canada Treaties of Australia Treaties of New Zealand Treaties of the Union of South Africa Treaties of the Irish Free State Treaties of British India Treaties of the Kingdom of Bulgaria Treaties of the Republic of China (1912–1949) Treaties of Colombia Treaties of Chile Treaties of Costa Rica Treaties of Cuba Treaties of Czechoslovakia Treaties of Denmark Treaties of the Dominican Republic Treaties of Ecuador Treaties of the Kingdom of Egypt Treaties of Estonia Treaties of Finland Treaties of the French Third Republic Treaties of Nazi Germany Treaties of the Second Hellenic Republic Treaties of Guatemala Treaties of Haiti Treaties of Honduras Treaties of the Kingdom of Hungary (1920–1946) Treaties of Pahlavi Iran Treaties of the Kingdom of Italy (1861–1946) Treaties of the Empire of Japan Treaties of the Kingdom of Iraq Treaties of Latvia Treaties of Lithuania Treaties of Liechtenstein Treaties of Luxembourg Treaties of Mexico Treaties of Monaco Treaties of the Netherlands Treaties of Nicaragua Treaties of Norway Treaties of Panama Treaties of Paraguay Treaties of Peru Treaties of the Second Polish Republic Treaties of the Ditadura Nacional Treaties of the Kingdom of Romania