Integrated drilling rigs on truck chassis classify as drilling machinery, not special purpose motor vehicles.

Water well drilling rigs mounted on truck chassis were treated as an integrated drilling unit where structural alterations and a power take-off arrangement meant the chassis could not function independently as a motor vehicle. On materially similar facts, the applicable tariff heading was held to be the one for drilling or boring machinery rather than the heading for special purpose motor vehicles. Applying that reasoning, the goods were correctly classifiable under Heading 84.30 and not under Heading 87.05, and the impugned classification was set aside.

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Issues: Whether water well drilling rigs mounted on truck chassis were classifiable under Heading 84.30 or under Heading 87.05 of the Central Excise Tariff Act, 1985.

Analysis: The goods consisted of drilling rigs mounted on chassis with structural alterations and a power take-off arrangement, so that the chassis and the drilling equipment operated as an integrated unit. The classification issue had already been decided in an earlier Tribunal order on materially similar facts, which held that such rigs are not to be treated as special purpose motor vehicles when the chassis cannot be separately used as a motor vehicle and the assembly is essentially machinery for boring or drilling. Applying that reasoning, the tariff entry for special purpose motor vehicles did not govern the goods, while the heading covering drilling or boring machinery was the appropriate classification.

Conclusion: The goods were correctly classifiable under Heading 84.30 and not under Heading 87.05.

Final Conclusion: The impugned classification was set aside and the appeal was allowed.

Ratio Decidendi: Where drilling machinery mounted on a vehicle chassis is so integrated that the chassis loses independent motor-vehicle character, the goods are classifiable as drilling or boring machinery rather than as special purpose motor vehicles.

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