Excise duty exemption cannot be reversed without fresh material and disclosed reasons for departing from the earlier determination.

Excise duty exemption could not be reversed through show cause notices and a higher-duty demand where the department failed to disclose any fresh basis for departing from its earlier exemption determination. The product had previously been treated as exempt on the strength of the Chemical Examiner's report, but the later notices sought recovery and enhanced duty without new analysis or supporting material. The court held that the impugned demand was unsupported on the record then available, quashed the notices and the refund rejection, and restored the exemption position, leaving the authorities free to proceed again only on proper grounds and fresh material in accordance with law.

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Issues: Whether the petitioners were entitled to exemption from excise duty under the relevant notification, and whether the show cause notices and demand for higher duty could stand without disclosure of the grounds for reversal of the earlier exemption.

Analysis: The petitioners' product had earlier been treated as entitled to exemption and lower duty on the basis of the Chemical Examiner's report. The later notices sought to recover the refunded amount and impose duty at a higher rate, but no fresh analysis or material was shown to justify the change in stand. The reasons for departing from the earlier decision were not disclosed, and the demand was held to be unsupported by the department's own material.

Conclusion: The show cause notices and the order rejecting refund were quashed, and the petitioners succeeded in establishing that the impugned demand could not be sustained on the record then available.

Final Conclusion: The petition was allowed, the exemption position in favour of the petitioners was restored, and the authorities were left free to proceed afresh only on proper grounds and fresh material in accordance with law.

Ratio Decidendi: A duty demand or reversal of an existing exemption cannot be sustained unless the authority discloses the basis for departing from its earlier determination and supports the change with relevant material.

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