[2][3] After World War II, the 1931 convention's scope was broadened considerably by the 1948 Protocol Bringing under International Control Drugs outside the Scope of the Convention of 13 July 1931 for Limiting the Manufacture and Regulating the Distribution of Narcotic Drugs.
Also, in certain reports, a summary statement would be sufficient for matters related to Group II drugs.
The establishment of these rudimentary groups foreshadowed the development of the drug scheduling system that exists today.
The 1988 United Nations Convention Against Illicit Traffic in Narcotic Drugs and Psychotropic Substances has two tables of controlled precursor chemicals.
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.