Modvat credit for viscosity-control input, commercial valuation of goods, and no extended limitation without suppression.

Scrubber liquor used in the manufacture of sodium silicate to adjust viscosity was treated as an input used in or in relation to manufacture, so Modvat credit was admissible. The transaction price of sodium silicate was accepted as the assessable value because a fully commercial, market-driven sale price is not to be disturbed merely because the value of a waste or incidental material was not separately added, and no undervaluation was shown. Allegations of collusion were unsupported by concealment, suppression, or intent to evade duty, so the extended period of limitation under excise law was not available.

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Issues: (i) Whether scrubber liquor used for adjusting viscosity in the manufacture of sodium silicate was an input eligible for Modvat credit; (ii) whether the sale price of sodium silicate was liable to be disturbed on the ground that the value of scrubber liquor was not added, resulting in undervaluation; (iii) whether allegations of collusion justified invocation of the extended period of limitation under the excise law.

Issue (i): Whether scrubber liquor used for adjusting viscosity in the manufacture of sodium silicate was an input eligible for Modvat credit.

Analysis: Scrubber liquor was added in the manufacturing process before clearance of the final product and was used to achieve the required viscosity. Under Rule 57A of the Central Excise Rules, credit is available on goods used in the manufacture of final products, and Rule 57B extends the credit even where the inputs are used in or in relation to manufacture, directly or indirectly, whether or not contained in the final product. A material used to control viscosity in the course of manufacture is sufficiently connected with manufacture. The fact that duty was paid on the input, even if its payment was disputed, did not defeat credit once payment had in fact been made. The process also fell within the inclusive understanding of manufacture under Section 2(f)(i) of the Central Excise Act.

Conclusion: Modvat credit on scrubber liquor was admissible and the denial of credit was unsustainable.

Issue (ii): Whether the sale price of sodium silicate was liable to be disturbed on the ground that the value of scrubber liquor was not added, resulting in undervaluation.

Analysis: Under Section 4 of the Central Excise Act, the assessable value is the normal commercial price at which the goods are sold. Once the transaction price is found to be fully commercial and market-driven, it is not to be dissected to test whether every component of production cost has been separately recovered. The record showed that scrubber liquor had no real commercial value, that its substitute was water, and that sales to other buyers were also at comparable prices. There was no basis to infer any price distortion arising from the supply arrangement or any undervaluation of sodium silicate.

Conclusion: The allegation of undervaluation failed and the sale price could be accepted as the assessable value.

Issue (iii): Whether allegations of collusion justified invocation of the extended period of limitation under the excise law.

Analysis: The supply arrangement was contractual, recorded in invoices and reflected contemporaneously in excise records. Scrubber liquor was a waste product that required costly disposal, and its free supply to local manufacturers did not indicate any hidden benefit or clandestine arrangement. In the absence of concealment or intent to evade duty, the foundation for alleging collusion was not made out. Consequently, the conditions for invoking the extended period under Section 11A of the Central Excise Act were not satisfied.

Conclusion: The extended period of limitation could not be invoked.

Final Conclusion: The demands, penalties and related adverse findings could not stand, and the appeals succeeded with consequential relief.

Ratio Decidendi: A material used in the manufacturing process to achieve the required characteristics of the final product is an input for Modvat purposes, and a fully commercial transaction price accepted by the market is the proper assessable value unless there is evidence of concealment, suppression or price manipulation.

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