Explain the concept of “small quantity” and ‘commercial quantity’ under the NDPS Act

Amarsingh Ramjibhai Barot Versus State of Gujarat-NDPS- Narcotic Drugs and Psychotropic Substances Act, 1985—Section 21(a)(b)(c), Section 2(vii a) and 2(xxiii a)—Manufactured drug—”Small quantity” and “commercial quantity”—By notification dated 19.10.2001 Central Government categorized manufactured drug weighing 5 gms as “small quantity” and 250 gms as “commercial quantity”