Tariff classification as Motor Spirit requires conclusive expert proof of fuel suitability; inconclusive chemical evidence is insufficient.

Tariff classification as "Motor Spirit" under Chapter 27 turns on proof that the product satisfies the statutory technical criteria, including suitability for use as fuel in spark ignition engines. The text states that the revenue bears the burden of establishing all essential conditions through reliable expert evidence; a chemical report showing only hydrocarbon composition and a flash point below 25 C is not enough if it does not conclusively address fuel suitability. On that basis, the classification and the consequential demand of differential duty, interest and penalty are described as unsustainable.

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Issues: Whether the disputed product was classifiable as "Motor Spirit" under Chapter 27 of the Central Excise Tariff Act, 1985, and whether the demand of differential duty, interest and penalty could be sustained.

Analysis: The Department, having sought to classify the product as "Motor Spirit", carried the burden of proving that the goods satisfied the statutory definition. The chemical analysis established only that the product was composed of hydrocarbon oil and had a flash point below 25 C. The report did not determine whether the product, by itself or in admixture with any other substance, was suitable for use as fuel in spark ignition engines. In the absence of a conclusive expert finding on this essential requirement, the classification adopted by the adjudicating authority rested on an unsupported assumption rather than scientific verification.

Conclusion: The product could not be sustained as classifiable under the heading for "Motor Spirit", and the demand of differential duty, together with interest and penalty, was unsustainable.

Final Conclusion: The appeals succeeded and the impugned orders confirming the duty demand were set aside.

Ratio Decidendi: Where tariff classification depends on fulfilment of specific technical criteria, the revenue must prove all essential conditions by reliable expert evidence, and an inconclusive chemical report cannot sustain the classification or consequential demand.

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