Captive power exemption and duty recovery upheld where generated electricity was mixed with purchased supply and demand was lawfully sustained.

Exemption under Notification No. 52/78-CE was unavailable where electricity generated in the plant was mixed with purchased electricity in a common grid and part of the supply was used outside the generating station; in that situation, the exempt quantity had not been distinctly proved and a proportionate duty basis was justified. Recovery of short-levied duty under Section 11-A could validly cover the statutory six-month period before the notice, as that provision was treated as the complete recovery mechanism. A wrong reference to Rule 9(2) did not invalidate the demand where the substantive requirements for recovery were satisfied.

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Issues: (i) whether electricity generated in the appellants' plant, mixed with purchased electricity in a common grid and partly consumed outside the plant, qualified for exemption under Notification No. 52/78-CE; (ii) whether demand of duty could be sustained for the period of six months prior to the show cause notice under Section 11-A of the Central Excises and Salt Act, 1944; and (iii) whether the demand was invalid because the Collector referred to Rule 9(2) instead of Section 11-A.

Issue (i): whether electricity generated in the appellants' plant, mixed with purchased electricity in a common grid and partly consumed outside the plant, qualified for exemption under Notification No. 52/78-CE

Analysis: The exemption was available only where the electricity was proved to the satisfaction of the Assistant Collector to have been produced by the generating station and subsequently used in the generating station. On the facts, the electricity generated by the appellants and the electricity purchased from D.V.C. were mixed before consumption, and part of the supply was used for non-industrial purposes in the township. In such a situation, the exemption could not be granted on a mere presumption that the generated electricity was wholly captively consumed. The proportional method adopted by the Collector, following the Patna High Court, was held to be reasonable and justified.

Conclusion: The issue is decided against the appellants and in favour of Revenue.

Issue (ii): whether demand of duty could be sustained for the period of six months prior to the show cause notice under Section 11-A of the Central Excises and Salt Act, 1944

Analysis: Section 11-A was treated as the governing provision for recovery of duty not levied, not paid, short-levied, or short-paid, and the Tribunal held that a demand could validly be raised for the statutory period of six months prior to the notice. The earlier Tribunal decisions relied upon by the appellants were distinguished because they involved long-standing approved classifications and a proposed change in classification, which was not the factual position here. The Tribunal also relied on the view that Section 11-A is an independent and complete provision for such recovery.

Conclusion: The issue is decided against the appellants and in favour of Revenue.

Issue (iii): whether the demand was invalid because the Collector referred to Rule 9(2) instead of Section 11-A

Analysis: The Tribunal held that there was no clandestine removal, but duty was nevertheless recoverable under Section 11-A. A wrong citation of the rule in the adjudication order did not vitiate the demand when the substantive ingredients for levy and recovery were satisfied and the demand was otherwise legally sustainable. The Collector was also held competent to exercise the powers of the subordinate authority under the Central Excise Rules, including by virtue of Rule 6(1). The demand was therefore not invalid on the ground of jurisdiction or mis-citation.

Conclusion: The issue is decided against the appellants and in favour of Revenue.

Final Conclusion: The exemption claim failed, the six-month pre-notice demand was upheld, and the duty demand was sustained notwithstanding the reference to Rule 9(2), with the appeal ending in dismissal.

Ratio Decidendi: Where generated and purchased electricity are mixed before consumption and the exempted quantity is not distinctly proved, duty may be levied on a proportionate basis; recovery of short-levied duty may validly be made for the statutory pre-notice period under Section 11-A, and a wrong procedural reference does not invalidate an otherwise lawful demand.

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