Concessional exemption for manufacturing input survives incidental by-product diversion; extended limitation, interest and penalty also fail.

A concessional exemption for naphtha used in fertilizer manufacture was upheld where carbon dioxide arose inevitably and technologically as a by-product of the chemical process, even though part of that gas was later used for ammonium bicarbonate, a non-fertilizer product. The operative use of the input was treated as manufacture of fertilizer or ammonia, so the exemption could not be denied on account of incidental diversion of the by-product. The extended period of limitation was also rejected because the manufacturing process and declarations had been disclosed, and the demand lacked legal basis. Interest and penalty fell with the underlying demand and were therefore not sustainable.

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Issues: (i) Whether naphtha cleared under the concessional exemption could be denied the benefit on the ground that carbon dioxide generated in the manufacturing process was partly used for ammonium bicarbonate, a non-fertilizer product; (ii) Whether the invocation of the extended period of limitation and the consequential levy of interest and penalty were sustainable.

Issue (i): Whether naphtha cleared under the concessional exemption could be denied the benefit on the ground that carbon dioxide generated in the manufacturing process was partly used for ammonium bicarbonate, a non-fertilizer product.

Analysis: The exemption was conditioned on naphtha being intended for use in the manufacture of fertilizer or ammonia. The carbon dioxide emerged during the chemical process as an inevitable and technologically necessary consequence of reforming naphtha and its separation was required to avoid poisoning of the catalyst. The quantity of carbon dioxide generated was determined by the chemical process itself and could not be controlled so as to prevent its emergence. The Court relied on the principle that goods intended for the exempted use do not lose exemption merely because incidental or involuntary by-products arise, and treated the whole of the raw naphtha as having been used for the intended fertilizer manufacture.

Conclusion: The denial of exemption was unsustainable and the assessee was entitled to the concessional benefit.

Issue (ii): Whether the invocation of the extended period of limitation and the consequential levy of interest and penalty were sustainable.

Analysis: The assessee had disclosed the manufacturing process and filed the relevant declarations, and the demand was founded on a view that was not legally tenable. In these circumstances, the extended period was not justified. Once the demand itself failed, the ancillary claims for interest and penalty also could not survive.

Conclusion: The extended period could not be invoked and the demands for interest and penalty were not sustainable.

Final Conclusion: The appeals succeeded because the entire demand was held to be untenable on merits, with the limitation objection additionally accepted, and the assessee was granted consequential relief.

Ratio Decidendi: Where an exempt input is procured for an intended manufacturing use, exemption cannot be denied merely because an incidental and unavoidable by-product arising from the same chemical process is diverted to a non-exempt use, if the by-product's emergence is technologically necessary and not a separate intended use of the input.

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