Excise-duty refund limitation, base-period production and proven mistake of law determine whether duty payments remain unrecoverable.

Excise-duty refund claims must be filed within the prescribed limitation period; the claim was barred because it was filed after six months from the latest duty payment. Exemption under Notification No. 198/76 requires production during the prescribed base period, and nil production caused by complete absence of manufacturing activity does not establish entitlement for subsequent clearances; the notification conditions were not shown to be met. A restitutionary refund based on mistake of law requires proof of the requisite mistake and resulting injury, while ignorance of law is insufficient. The duty payment therefore remained unrecoverable.

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Issues: (i) Whether the excise-duty refund claim was barred by limitation; (ii) Whether a manufacturer with no production during the prescribed base period was entitled to exemption under Notification No. 198/76 dated 16.06.1976; (iii) Whether refund could be claimed on the basis of ignorance or mistake of law.

Issue (i): Whether the excise-duty refund claim was barred by limitation.

Analysis: The refund application was filed on 02.04.1979 for duty paid up to 31.03.1978. Even treating the latter date as the final date of payment, the six-month period expired on 30.09.1978.

Conclusion: The refund claim was time-barred, against the assessee.

Issue (ii): Whether a manufacturer with no production during the prescribed base period was entitled to exemption under Notification No. 198/76 dated 16.06.1976.

Analysis: The exemption scheme requiring fixation of a base period presupposes production during that period. Nil production owing to complete absence of manufacturing activity cannot establish eligibility for exemption on subsequent clearances. Compliance with the notification conditions was also not shown.

Conclusion: The assessee was not entitled to the exemption benefit, against the assessee.

Issue (iii): Whether refund could be claimed on the basis of ignorance or mistake of law.

Analysis: Ignorance of law is distinct from mistake of law. Restitution for payment under mistake requires a common mistake and proof that the payer suffered injury from the payment; no such injury was pleaded or established.

Conclusion: No restitutionary refund was available, against the assessee.

Final Conclusion: The duty payment remained unrecoverable because the claim was untimely and unsupported by either the exemption conditions or a sustainable restitutionary basis.

Ratio Decidendi: A refund claimant must comply with the prescribed limitation period and, where refund is sought on mistake of law, establish both the requisite mistake and resulting injury; an exemption based on a production base period is unavailable where there was no production in that base period.

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