Tax deduction at source for works contracts upheld as a valid machinery provision within the State's legislative field.

Section 13AA(1) of the Orissa Sales Tax Act, 1947, was upheld as a valid machinery provision for deduction of tax at source in works contracts, because it operated as an advance collection device within the State's sales tax field and not as a charging provision. The court held that the State could enact such an ancillary measure, and that Article 286 did not invalidate a provision merely regulating collection at source. The amended scheme, including the certificate and penalty mechanism, was also found constitutionally sound. The challenge to the notices therefore failed and the writ petition was dismissed.

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Issues: Whether section 13AA(1) of the Orissa Sales Tax Act, 1947, providing for deduction of tax at source in relation to works contracts, was beyond the legislative competence of the State or otherwise unconstitutional, and whether the impugned notices issued under that provision were liable to be quashed.

Analysis: The provision was treated as a machinery provision for advance collection of tax and not as a charging provision. The power to enact such a measure was held to flow from the State's legislative field over sales tax and from the ancillary and incidental powers connected with that field. Article 286 was held to operate on laws imposing tax on inter-State, import, export, or declared goods transactions, but not on a provision that merely regulated collection at source. The amended scheme, including the certificate mechanism and penalty provision, was found not to suffer from constitutional infirmity, and the challenge based on divisibility of contracts and alleged absence of liability at the stage of deduction was rejected.

Conclusion: Section 13AA(1) was upheld as constitutionally valid, and the challenge to the impugned notices failed. The writ petition was dismissed.

Ratio Decidendi: A statutory provision requiring deduction at source as an advance collection mechanism for works contracts is constitutionally valid if it operates as machinery for tax collection within the State's legislative field and does not itself impose tax on transactions barred by Article 286 of the Constitution of India.

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