Distinct commercial commodity principle makes assembled lorry sale taxable; later beneficial explanation applies only prospectively.

A lorry assembled by mounting a body on a chassis was treated as a distinct commercial commodity, not a mere continuation of the chassis and body materials already taxed. On that basis, the sale of the completed lorry was held taxable and not protected as a second sale. The later explanation to entry 94, which granted relief where tax had already been levied on the chassis or body built on it, was treated as a new beneficial provision and therefore applied only prospectively. As the relevant assessment period preceded its introduction, no relief was available to the assessee.

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Issues: (i) Whether the sale of a lorry assembled by mounting a body on a chassis, after tax had already been paid on the chassis and body materials, was a second sale exempt from tax or a taxable sale of a distinct commercial commodity; (ii) Whether the explanation added to entry 94 of the First Schedule to the Kerala General Sales Tax Act, 1963 could be applied retrospectively to grant relief.

Issue (i): Whether the sale of a lorry assembled by mounting a body on a chassis, after tax had already been paid on the chassis and body materials, was a second sale exempt from tax or a taxable sale of a distinct commercial commodity.

Analysis: Entry 86 of the First Schedule grouped motor vehicles, chassis of motor vehicles, and motor bodies built on chassis in the same entry, but the legislative classification itself showed that a chassis and a motor vehicle are distinct commercial commodities. Applying the principle that sales tax attaches to the sale of separate commercial commodities and not to the underlying materials out of which they are made, the completed lorry was treated as a different taxable goods entity from the chassis and the body components. The authorities were therefore justified in treating the sale of the lorry as a taxable transaction and not as a protected second sale.

Conclusion: The issue was decided against the assessee and in favour of the Revenue; the sale of the lorry was held taxable.

Issue (ii): Whether the explanation added to entry 94 of the First Schedule to the Kerala General Sales Tax Act, 1963 could be applied retrospectively to grant relief.

Analysis: The explanation introduced with effect from 1 January 2000 gave a reduction where tax had already been levied on the chassis or body built on such chassis. The Court treated this explanation as creating a new benefit rather than merely clarifying existing law, and therefore held that it operated prospectively only. Since the relevant assessment period preceded its introduction, no relief could be granted under the explanation.

Conclusion: The issue was decided against the assessee and in favour of the Revenue; the explanation was held to be prospective.

Final Conclusion: The revision failed because the sale of the lorry was liable to tax under the Act and the later explanatory benefit could not be extended to the assessee for the relevant period.

Ratio Decidendi: Where the statutory entry itself treats a chassis and the completed motor vehicle as distinct taxable goods, the assembled vehicle constitutes a separate commercial commodity for sales tax purposes, and a later enlarging or beneficial explanation applies only prospectively unless expressly made retrospective.

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