Modvat credit for exempt by-products remains protected when waste arises during manufacture and inputs serve dutiable production.

Modvat credit is protected where waste, refuse or exempt by-products arise during manufacture and the inputs are used for the principal dutiable products. The text explains that zinc residue, lead slag, beta cake and waltz kiln slag generated in the manufacturing process did not justify denial or proportionate reversal of credit merely because part of the inputs was contained in those by-products or because the by-products were exempt. Rule 57D(1) of the Central Excise Rules, 1944 was treated as preserving the credit position, and the earlier Tribunal reasoning in the assessee's own matter was followed; the contrary cases were distinguished on facts.

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Issues: Whether zinc residue, lead slag, beta cake and waltz kiln slag generated in the course of manufacture were eligible for exemption under Notification No. 19/88-C.E. as amended by Notification No. 27/91-C.E., where modvat credit had been taken on the inputs used in manufacture.

Analysis: The goods in question arose as residue or by-product in the manufacturing process, while credit had been availed on the duty-paid inputs used for the principal final products. The applicable framework under Rule 57D(1) of the Central Excise Rules, 1944 protected modvat credit from denial merely because part of the inputs was contained in waste, refuse, or by-product, or because such by-product was exempt from duty. The issue was already covered by the Tribunal's earlier decision in the respondent's own case, and the reasoning accepted there applied equally here. The cited contrary authorities were found distinguishable on their facts.

Conclusion: The exemption and credit position was decided in favour of the assessee, and the revenue's challenge failed.

Ratio Decidendi: Modvat credit cannot be denied on the ground that exempt by-products or waste arise during manufacture where the inputs are used for the principal dutiable production, and Rule 57D(1) protects such credit from proportionate reversal.

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