Classification by constituent material defeats extended limitation and penalty where no suppression in filter element imports is shown.

Filter elements were initially classified under Tariff Item 84219900 on a bona fide understanding, and a later Board circular clarified that their classification depends on the constituent material, with paper-based elements falling under the relevant paper headings while filters remain under Heading 84.21. Because the importer had filed invoices, catalogues and technical write-ups, and there was no requirement to declare the constituent material in the Bill of Entry, suppression of material facts or misdeclaration for the past period was not established. The foundation for invoking the extended period of limitation therefore failed, and the past-period demand, interest and penalty were set aside. Classification on the clarified basis was affirmed for the subsequent period.

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Issues: Whether the differential duty demand for the past period could be sustained by invoking the extended period of limitation and whether penalty could be imposed, when the classification of filter elements was clarified to depend on the constituent material.

Analysis: The import of filter elements had earlier been classified under Tariff Item 84219900 on a bona fide understanding. A later Board circular clarified that elements of filters are to be classified according to their constituent material and that paper-based elements would fall under the relevant paper headings, while filters themselves remain under Heading 84.21. The importer had filed import documents such as invoices, catalogues, and technical write-ups, and there was no requirement to declare the constituent material in the Bill of Entry. On these facts, suppression of material facts or mis-declaration for the past period was not established, and the foundation for invoking the extended period failed.

Conclusion: The demand for the past period invoking the extended period of limitation, along with interest and penalty, was set aside. The classification of filter elements as per their constituent material for the subsequent period was affirmed.

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