Over the last century, a worldwide system for control of drugs of abuse has developed gradually through the adoption of a series of international treaties. The important multilateral conventions currently in force are the Single Convention on Narcotic Drugs of 1961 as amended by the 1972 Protocol; the Convention on Psychotropic Substances of 1971 and, adopted in 1988, the United Nations Convention against Illicit Traffic in Narcotic Drugs and Psychotropic Substances. Each successive treaty brought complementary regulations and advances in international law. From the beginning, the basic aim of the international drug control treaties has been to limit the use of drugs to medical and scientific purposes only.
A computer-based system, Computer and Telecommunication System for International and National Drug Control (NDS), has been designed and is available to facilitate management and control over licit movements of psychoactive drugs and precursor chemicals and to enhance timeliness of information exchange at the national and international levels. NDS can be utilized to fulfill varying national drug control management needs. It could be used to: