 In 1919, the first Opium Law (later known as List I of the Opium Law) was introduced, and on 12 May 1928 the second Opium Law (later known as List II of the Opium Law) was introduced.The first Opium Law was created to regulate drugs with a high addiction or abuse factor, or that are physically harmful.As the name indicates the main reason for introduction was to regulate the Opium trade and later to control various other addictive drugs like morphine, cocaine, heroin, barbiturates, amphetamines and several decades later, benzodiazapines, which were used both medically and recreationally.