Essential character of diagnostic antisera governs exemption and classification, despite kit form and freeze-drying.

An imported pregnancy-detection kit was treated as agglutinating sera because its essential character remained that of monoclonal anti-HCG antibodies, even though it was freeze-dried, mixed with buffer, and imported in kit form for reconstitution and visual diagnosis. Technical material, medical opinion, and HSN notes supported the view that antisera may be used for diagnostic in vitro tests. On that basis, the product was held eligible for exemption under Sl. No. 216 of Schedule A to Notification No. 208/81-Cus. and classifiable under Heading 3002.10, rather than as a composite diagnostic reagent; the denial of exemption and differential duty demand were therefore unsustainable.

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Issues: (i) Whether the imported pregnancy-detection kit was "agglutinating sera" eligible for exemption under Sl. No. 216 of Schedule A to Notification No. 208/81-Cus. dated 22-9-1981. (ii) Whether the goods were correctly classifiable under Heading 3002.10 of the Customs Tariff Act.

Issue (i): Whether the imported pregnancy-detection kit was "agglutinating sera" eligible for exemption under Sl. No. 216 of Schedule A to Notification No. 208/81-Cus. dated 22-9-1981.

Analysis: The product was found to contain monoclonal antibodies specific to HCG, freeze-dried for preservation and mixed with buffer solution for use. The carrier medium used for visual detection did not alter its basic character, and the kit form was only the mode of import for reconstitution and use. The surrounding technical material, medical opinions, and HSN notes supported the view that antisera can be used for diagnostic purposes, including in vitro tests, and that the product retained the character of agglutinating sera despite its presentation as a diagnostic kit.

Conclusion: The imported goods were agglutinating sera and were eligible for the benefit of exemption under Sl. No. 216 of Schedule A to Notification No. 208/81-Cus. dated 22-9-1981.

Issue (ii): Whether the goods were correctly classifiable under Heading 3002.10 of the Customs Tariff Act.

Analysis: Once the product was held to be agglutinating sera, it fell within the tariff entry covering antisera and other blood fractions rather than composite diagnostic reagents. The heading adopted by the Department did not accord with the product's essential character as an antiserum used for diagnostic purposes.

Conclusion: The goods were classifiable under Heading 3002.10 of the Customs Tariff Act.

Final Conclusion: The exemption denial and differential duty demand could not be sustained, and the import was entitled to full duty exemption as agglutinating sera.

Ratio Decidendi: For exemption and classification purposes, the essential character of the imported product as antisera is not displaced by freeze-drying, coating on a carrier, or import in kit form when those features are only incidental to diagnostic use and reconstitution.

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