Cenvat credit reversal does not apply to by-product waste arising incidentally as a technological necessity in manufacture.

Rule 6 of the Cenvat Credit Rules, 2004 applies where common inputs are used to produce both dutiable and exempt final products, requiring credit reversal in that setting. Where the exempt clearance is only a by-product or waste arising incidentally as a technological necessity in the manufacturing process, it is not treated on the same footing as an exempt final product for Rule 6 purposes. The earlier modvat-based interpretation continued to govern that limited category, consistent with the Supreme Court's binding declaration of law. On that basis, the demand was unsustainable, the appeals succeeded, and the impugned order was set aside with consequential relief.

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Issues: Whether Rule 6 of the Cenvat Credit Rules, 2004 applies where a dutiable final product is manufactured and a by-product emerges only as a technological necessity during the manufacturing process.

Analysis: The relevant scheme distinguishes between exempted final products cleared with common inputs and a by-product or waste that emerges incidentally in the course of manufacture. A combined reading of the credit rules shows that Rule 6 is attracted when common inputs are used to produce two final products, one dutiable and the other exempt. Where the exempt clearances are of a by-product arising as a technological necessity, they do not stand on the same footing as a final product for the purpose of reversing credit. The earlier interpretation under the erstwhile modvat regime remained applicable to that limited class of cases, and the binding declaration of law by the Supreme Court governed the issue.

Conclusion: Rule 6 was held not applicable to the by-product generated as a technological necessity, and the demand could not be sustained.

Final Conclusion: The appeals succeeded and the impugned order was set aside with consequential relief.

Ratio Decidendi: Credit-reversal provisions apply only where common inputs yield dutiable and exempt final products; they do not extend to a by-product or waste arising incidentally as a technological necessity in manufacture.

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