Unlawful import levy on coal and conditional refund governed by limitation and unjust enrichment principles

A levy collected on imported coal was held unlawful because the customs authorities acted under notifications issued only for additional excise duty, while no notification under the provision authorising customs duty on imports was issued; the collection was therefore without authority of law and contrary to Article 265. The refund claim was not defeated by the Customs Act limitation argument, but the plea that time should run only from discovery of mistake was rejected, so refund was confined to the period found reasonable on the facts. Refund was also made subject to verification of unjust enrichment, as the claimant had to show that the burden had not been passed on.

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Issues: (i) whether the additional duty collected on import of coal under Section 6 of the Coal Mines (Conservation and Development) Act, 1974 was lawful; (ii) whether the refund claim could be defeated by limitation under the Customs Act or by the plea of discovery of mistake under the Limitation Act; and (iii) whether refund could be granted without examining unjust enrichment.

Issue (i): whether the additional duty collected on import of coal under Section 6 of the Coal Mines (Conservation and Development) Act, 1974 was lawful.

Analysis: The levy was traced to notifications issued under Section 6, which authorises only additional duty of excise. Section 7, which specifically permits a customs duty on imported coal, was never invoked by a notification. In the absence of a notification under Section 7, the customs authorities could not collect the amount as an import levy. The earlier Supreme Court ruling on the same statutory scheme was treated as squarely governing the matter, and the collection was held to be without authority of law and contrary to Article 265.

Conclusion: The levy on imported coal was unlawful and the assessee succeeded on this issue.

Issue (ii): whether the refund claim could be defeated by limitation under the Customs Act or by the plea of discovery of mistake under the Limitation Act.

Analysis: The claim was not treated as a routine refund under the customs regime, because the amount had been collected without authority of law. However, the Court rejected the contention that the limitation period could be deferred until discovery of mistake on the basis of another assessee's case. Applying the governing principles on refund of illegal taxes, the Court held that a claimant cannot reopen a final levy merely because another person later secured a favorable ruling. The claim was therefore confined to the period found reasonable on the facts.

Conclusion: The refund claim was maintainable only to the limited extent allowed by the Court, and the broader limitation plea was rejected.

Issue (iii): whether refund could be granted without examining unjust enrichment.

Analysis: The doctrine of unjust enrichment applies to indirect tax refunds, including refunds sought through writ proceedings. The claimant must establish that the burden of duty was not passed on to any other person. Since that factual question required examination of material by the revenue authorities, it was not finally determined in the writ petition at the first instance.

Conclusion: Refund was made conditional upon verification that the burden had not been passed on.

Final Conclusion: The Court granted only partial relief: the impugned collection was declared unlawful, but refund was restricted to the specified period and left subject to verification of unjust enrichment, with interest directed on the refundable amount.

Ratio Decidendi: A levy collected without a valid statutory notification under the provision authorising customs duty on imports is unconstitutional and refundable in writ jurisdiction, but refund of indirect tax cannot be granted unless the claimant establishes that the burden was not passed on to others.

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