Optional exemption under Central Excise law and proof of duty collection under section 11D(1) govern the demand's validity.

Before insertion of section 5A(1A), an exemption notification under the Central Excise Act did not compel an assessee to avail the exemption unless the notification itself made it mandatory; the manufacturer could opt to pay duty at the tariff rate, so a demand premised on compulsory exemption was unsustainable. Section 11D(1) applies only where an amount representing duty has actually been collected from customers; where invoices do not show separate recovery of the rule 57CC amount and no contrary evidence is produced, the statutory condition is not met, and a demand under section 11D(1) fails.

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Issues: (i) Whether, prior to insertion of section 5A(1A) of the Central Excise Act, 1944, exemption under notifications could be treated as compulsory so as to deny the assessee the option to pay duty at the tariff rate; (ii) whether the amount paid under rule 57CC of the Central Excise Rules, 1944 and allegedly recovered from customers was liable to be demanded under section 11D(1) of the Central Excise Act, 1944.

Issue (i): Whether, prior to insertion of section 5A(1A) of the Central Excise Act, 1944, exemption under notifications could be treated as compulsory so as to deny the assessee the option to pay duty at the tariff rate.

Analysis: The applicable notifications granted exemption from duty, but the legal position before insertion of section 5A(1A) was that an assessee was not compelled to avail the exemption unless the notification made it mandatory. In that regime, the manufacturer could choose to pay duty at the tariff rate instead of claiming exemption. The demand based on the premise that exemption had to be compulsorily availed was therefore unsustainable.

Conclusion: The exemption was not compulsory for the assessee for the relevant period, and the demand and appropriation based on the supposed failure to avail exemption were not justified.

Issue (ii): Whether the amount paid under rule 57CC of the Central Excise Rules, 1944 and allegedly recovered from customers was liable to be demanded under section 11D(1) of the Central Excise Act, 1944.

Analysis: Liability under section 11D(1) could arise only if the assessee had collected an amount representing duty from customers. The invoices showed that the amount paid under rule 57CC was not recovered as a separate levy from customers, and the Revenue produced no contrary evidence. In the absence of proof of collection, the statutory condition for invoking section 11D(1) was not satisfied.

Conclusion: The demand under section 11D(1) was not sustainable.

Final Conclusion: The Revenue's challenge failed in entirety, and the assessee's relief granted by the appellate authority was sustained.

Ratio Decidendi: Before insertion of section 5A(1A), an exemption notification under section 5A(1) did not compel its availing unless the notification so provided, and section 11D(1) applies only where an amount recoverable as duty has in fact been collected from customers.

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