Expert trade evidence and full disclosure in returns defeated suppression, leading to remand on exemption and relief from penalty.

The exemption dispute turned on whether purified terephthalic acid could be treated as pure terephthalic acid, with the Tribunal noting that the tariff fixed no purity percentage and that trade understanding supported treatment of the product as the highest grade of terephthalic acid. An expert certificate stating that 99.8% purity could qualify as pure terephthalic acid had been produced but not examined by the adjudicating authority, so the exemption question was remanded for fresh consideration with that material and any contrary evidence. On limitation, disclosure of the product description in monthly returns negatived wilful suppression, so the extended period was unavailable and the equal penalty could not stand.

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Issues: (i) Whether the dispute regarding entitlement to exemption on the basis that purified terephthalic acid could be treated as pure terephthalic acid required reconsideration on the basis of expert material and market understanding; (ii) Whether invocation of the extended period of limitation and imposition of equal penalty were sustainable.

Issue (i): Whether the dispute regarding entitlement to exemption on the basis that purified terephthalic acid could be treated as pure terephthalic acid required reconsideration on the basis of expert material and market understanding.

Analysis: The exemption controversy turned on the meaning of "pure" vis-a -vis "purified" terephthalic acid. The record showed that the tariff did not prescribe any purity percentage, and the product was understood in trade and industry as the highest grade of terephthalic acid. An expert certificate from a university chemical engineering department, indicating that the product of 99.8% purity could be treated as pure terephthalic acid, was placed before the Tribunal, but it had not been considered by the adjudicating authority.

Conclusion: The matter was remanded for de novo consideration of the exemption issue after examining the expert certificate and any contrary material.

Issue (ii): Whether invocation of the extended period of limitation and imposition of equal penalty were sustainable.

Analysis: The appellant had disclosed the product description in the monthly returns filed with the department. In a dispute essentially concerning classification and exemption, the Tribunal found no basis for alleging wilful suppression. Once suppression was absent, the precondition for extending limitation failed, and the penalty resting on the same foundation could not survive.

Conclusion: The extended period of limitation was held unavailable and the equal penalty was set aside.

Final Conclusion: The appeal was allowed in part by sending the exemption question back for fresh adjudication, while the limitation and penalty findings were decided in favour of the assessee.

Ratio Decidendi: In classification and exemption disputes, expert trade evidence relevant to the nature and understanding of the goods must be considered, and disclosure in returns negatives wilful suppression for invoking the extended period of limitation.

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