By-product coal-gas not separately taxable; cenvat credit on common inputs allowed under relevant rules

CESTAT Kolkata allowed the appeal, holding that coal-gas as a by-product arising during manufacture cannot be separately accounted for, and cenvat credit utilized for common inputs is justified. The tribunal relied on Calcutta HC precedent, which ruled that inputs have no role in producing the by-product, negating duty demands on it. Additionally, the demand raised beyond the limitation period was set aside since the appellant, a PSU, had proportionately reversed cenvat credit and maintained proper records without intent to evade duty. Both the merits and time-bar challenges succeeded, resulting in the impugned order being quashed.

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ISSUES:

Whether the by-product (coal gas) emerging incidentally during the manufacture of dutiable goods is liable to excise duty when sold at nil rate under the Central Excise Tariff.Whether the failure to maintain separate accounts for Cenvat credit attributable to exempted by-products justifies demand of excise duty and reversal of Cenvat credit under Rule 6(3)(b) of the CENVAT Credit Rules.Whether the demand for excise duty and penalty for the extended period is barred by limitation (time-bar).

RULINGS / HOLDINGS:

On the issue of liability of excise duty on by-product coal gas: The Court held that "the alleged exempted goods are not manufactured goods but are the by-products emerging in the manufacturing process" and that "the impugned inputs have no role in the production of the coke oven gas and these are merely used in the production of the by-products." Therefore, demand of excise duty on coal gas attracting NIL rate is not justified.Regarding maintenance of separate accounts and Cenvat credit reversal: The Court found that due to "practical difficulties," separate accounting for inputs attributable to exempted by-products is not feasible, and since the appellant had proportionately reversed the Cenvat credit as per Rule 6(3)(b), the demand for additional duty and penalty is unsustainable.On time-bar for extended period demand: The Court held that since the appellant had properly recorded all transactions and reversed Cenvat credit proportionately without intent to evade duty, the Revenue failed to prove suppression or evasion, and thus the confirmed demand for the extended period is set aside on account of time-bar.

RATIONALE:

The Court applied the legal framework under the Central Excise Tariff Act, 1985, and the CENVAT Credit Rules, specifically Rule 6(3)(b), which governs reversal of credit on exempted goods.The Court relied on precedent decisions including Commissioner of Central Excise, Bolpur Vs. Indian Iron and Steel Co. Ltd. and Union of India Vs. Hindustan Zinc Ltd., which established that by-products emerging incidentally in the manufacturing process and attracting NIL rate of duty do not justify excise demand or penalty if proportionate credit reversal is made.The Court recognized the practical impossibility of separate accounting for inputs used in manufacture of exempted by-products, thereby endorsing a proportional reversal approach.The Court also emphasized the absence of any evidence of suppression or intent to evade duty, which is a prerequisite for extending limitation periods under excise law.

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