Tariff classification of fused quartz and fused silica turns on commercial identity, not extended meanings from another tariff.

Fused quartz and fused silica were discussed for tariff classification as glass for countervailing duty under Item 23A of the Central Excise Tariff. The governing principle applied was that goods are classified by their commercial identity and functional character in trade, while Indian Standards or ASTM descriptions are only supporting material. An extended meaning of "glass" in Chapter Note 3 of Chapter 70 of the Customs Tariff could support customs classification, but it could not be imported into the Central Excise Tariff without a corresponding note or explanation. On that basis, fused quartz and fused silica were not ordinarily classifiable as glass under Item 23A.

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Issues: Whether fused quartz and fused silica were classifiable as glass for the purpose of countervailing duty under Item 23A of the Central Excise Tariff.

Analysis: The classification of the imported quartz cups had earlier been examined on the same question. The extended meaning of glass in Chapter Note 3 of Chapter 70 of the Customs Tariff Act supported classification as glass for basic customs duty, but there was no corresponding note in the Central Excise Tariff. The Court applied the settled principle that goods are to be classified according to how they are known in trade and by the functions they perform, and treated Indian Standards or ASTM descriptions only as supporting material, not as conclusive. On that basis, fused quartz and fused silica could not ordinarily be treated as glass for Item 23A in the absence of an express tariff note.

Conclusion: The imported goods were not assessable as glass under Item 23A of the Central Excise Tariff; the appeal by the Revenue failed.

Final Conclusion: The assessee retained the benefit of the refund claim in respect of countervailing duty, and the Revenue's challenge to the classification was rejected.

Ratio Decidendi: For tariff classification, the commercial and functional identity of goods prevails, and an extended meaning given to a term in one tariff by a specific chapter note cannot be imported into another tariff in the absence of a corresponding note or explanation.

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