Functional tariff classification prevails over general resin heading for ion exchange copolymer resins used only in water treatment.

Imported synthetic ion exchange copolymer resins used only for water purification and boiler treatment were classified by functional use rather than as general artificial resins. Chapter 39 was treated as a broad heading for artificial resins and plastics, but these goods had been specially endowed with ion-exchange properties and were used solely to remove impurities from water. Because item 38.01/19(9) covered water treatment chemicals not elsewhere specified, the specific functional entry prevailed over the general resin classification. On the same reasoning, countervailing duty assessment under item 15A of the Central Excise Tariff was not sustainable, and item 68 was the more appropriate corresponding head.

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Issues: Whether imported synthetic ion exchange copolymer resins used only for water purification and boiler treatment were correctly classifiable as water treatment chemicals under item 38.01/19(9) of the Customs Tariff, or as artificial resins under Chapter 39, and whether the corresponding countervailing duty assessment under item 15A of the Central Excise Tariff was sustainable.

Analysis: The goods were accepted to be synthetic ion exchange resins, but their commercial and functional character was not that of general-purpose artificial resins. Chapter 39 was treated as a general heading for artificial resins and plastic materials meant to be shaped or used as such, whereas the imported products had been specially endowed with ion-exchange properties for removing impurities from water. Their only use was in water treatment, particularly for demineralised water used in boiler operations, and that special function took them out of the ordinary class of resins contemplated by Chapter 39. Since item 38.01/19(9) covered water treatment chemicals not elsewhere specified, the more specific functional classification had to prevail over the general resin entry. On the same reasoning, assessment under item 15A of the Central Excise Tariff was held inappropriate, and item 68 was regarded as the more suitable corresponding head.

Conclusion: The imported ion exchange copolymer resins were assessable as water treatment chemicals under item 38.01/19(9), not as artificial resins under Chapter 39, and the countervailing duty assessment under item 15A was not sustainable.

Final Conclusion: The appeal succeeded and the importer was entitled to reassessment and consequential refund relief.

Ratio Decidendi: Where a product is specially adapted and used only for a specific functional purpose, the specific functional tariff entry prevails over a broader general classification entry for the underlying material.

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