Purity testing and quantity determination under the NDPS Act depend on whether the seized substance is a mixture or a drug simplicitor.

Under the NDPS Act, quantity determination depends on whether the seized substance is a mixture or preparation, or the narcotic drug/psychotropic substance itself. For mixtures or preparations covered by the relevant notification entry, the exact drug content must be established by purity test before the quantity category can be fixed; absent such testing, the contraband is to be treated as small quantity. Where the substance is the drug simplicitor and not a mixture, no purity test is required and the entire seized weight is taken into account to decide whether it is small, intermediate, or commercial quantity.

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Issues: Whether, in prosecutions under the NDPS Act involving a mixture or preparation containing a narcotic drug or psychotropic substance, the absence of a purity test requires the contraband to be treated as small quantity, and whether the entire quantity can be taken into account where the substance is a narcotic drug or psychotropic substance simplicitor.

Analysis: The decision distinguished between mixtures or preparations covered by Entry 239 of Notification No. S.O. 1055(E) dated 19.10.2001 and a narcotic drug or psychotropic substance simplicitor falling within the relevant drug entry itself. For mixtures or preparations with or without neutral material, the exact content of the narcotic drug or psychotropic substance must be ascertained by purity test before the quantity category under Section 21 can be determined. In the absence of such test, the contraband is to be treated as small quantity. Where the contraband is not a mixture or preparation and is the drug itself, no purity test is required and the whole weight of the substance is to be considered for deciding whether the quantity is small, intermediate, or commercial.

Conclusion: The reference was answered in favour of the appellant to the extent that, for mixtures or preparations covered by Entry 239, failure to conduct a purity test means the quantity must be treated as small quantity; for narcotic drug simplicitor, the entire quantity governs the punishment provision.

Final Conclusion: The reference was disposed of by laying down the governing rule on purity testing and quantity determination under the NDPS Act, with the matter left to be taken up before the learned Single Judges for consequential orders.

Ratio Decidendi: For mixtures or preparations containing a narcotic drug or psychotropic substance and covered by the relevant notification entry, punishment under the NDPS Act depends on proving the exact drug content by purity test, whereas no such test is needed when the seized substance is the narcotic drug simplicitor and its entire weight is decisive.

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