By-product recovery inputs and credit reversal: inevitable coke oven gas did not justify MODVAT/CENVAT disallowance.

Wash oil and sulphuric acid used in the by-product recovery stage of coke oven gas production were not treated as inputs used in the manufacture of the gas itself, because coke oven gas arose inevitably during coal carbonisation as a technological by-product. On that reasoning, reversal of MODVAT/CENVAT credit was held unsustainable. The extended limitation period and penalty also could not be invoked, as the record did not establish wilful suppression, fraud, collusion, misstatement, or intent to evade duty. The departmental appeal therefore failed, and the assessee's relief was affirmed on both credit reversal and limitation.

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Issues: (i) Whether wash oil and sulphuric acid were used in or in relation to the manufacture of coke oven gas so as to attract reversal of credit and the amount payable under the MODVAT/CENVAT rules; and (ii) whether the extended period of limitation and penalty were rightly invoked on the allegation of suppression of facts and intent to evade duty.

Issue (i): Whether wash oil and sulphuric acid were used in or in relation to the manufacture of coke oven gas so as to attract reversal of credit and the amount payable under the MODVAT/CENVAT rules.

Analysis: The manufacturing process showed that coke oven gas emerged inevitably during coal carbonization as a by-product of metallurgical coke manufacture. The gas first came into existence in the coke oven battery, and the subsequent cleaning or recovery operations in the by-product recovery plant were directed to removal of tar, ammonia, naphthalene, benzene and other impurities and to extraction of other saleable by-products. The inputs in question were used at that later stage and not for producing coke oven gas itself. The rules governing reversal of credit apply where common inputs are used in the manufacture of exempted or nil-rated final products, but they do not extend to an inevitable by-product which arises as a technological necessity and is not itself shown to be the final product manufactured with those inputs.

Conclusion: The credit reversal demand was not sustainable, and the finding is in favour of the assessee.

Issue (ii): Whether the extended period of limitation and penalty were rightly invoked on the allegation of suppression of facts and intent to evade duty.

Analysis: The adjudication order did not record a supported finding of wilful suppression, fraud, collusion, or misstatement with intent to evade duty. Mere allegation that credit was taken on inputs used in relation to nil-rated goods was insufficient to justify the extended limitation period or the consequential penalty provisions. On the materials recorded, the requisite statutory ingredients for invoking the extended period were not established.

Conclusion: The extended period and penalty were not legally invocable, and the finding is in favour of the assessee.

Final Conclusion: The departmental appeal fails, and the order in favour of the assessee stands affirmed on both the credit issue and the limitation and penalty issue.

Ratio Decidendi: A statutory reversal of credit cannot be fastened where the disputed input is used only in a subsequent recovery process and the nil-rated product arises as an inevitable by-product by technological necessity; the extended limitation and penalty provisions require a clear finding of wilful suppression or intent to evade duty.

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