Customs valuation requires a lawful basis for purity-based adjustments before enhancing declared value of mercury goods.

Customs valuation could not be enhanced by comparing 82.1% purity mercury with 100% pure mercury without a demonstrable and legally sustainable basis for adjustment. The Tribunal found no record support for the alleged scientific adjustments and no concurrence by the importer or its CHA, so the declared value could not be displaced on that footing. The enhancement made under the Customs (Valuation) Rules was therefore invalid, the Revenue's appeal was dismissed, and the appellate Commissioner's valuation was upheld.

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Issues: Whether the enhancement of the value of mercury by comparing 82.1% purity mercury with 100% pure mercury, and by making alleged scientific adjustments for valuation, was valid under the Customs valuation rules.

Analysis: The valuation dispute turned on whether the declared value could be displaced by adopting 100% pure mercury as the benchmark for goods found to be 82.1% pure. The lower authority had enhanced value under Rule 7A of the Customs (Valuation) Rules, 1988 after rejecting the declared value. The Tribunal found no record support for the claimed scientific adjustments or for any concurrence by the importer or its CHA. It held that there was no proper basis for comparing mercury of different purity levels for valuation purposes, and that such an adjustment was not permissible on the facts presented.

Conclusion: The enhancement of value was invalid and the Revenue's appeal was dismissed.

Final Conclusion: The assessed value determined by the lower authority was not sustained, and the valuation adopted by the appellate Commissioner was upheld.

Ratio Decidendi: For customs valuation, a benchmark derived from goods of different purity cannot be used without a demonstrable and legally sustainable basis for adjustment.

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