Works contract tax under section 6D remains subject to constitutional limits, while overriding the West Bengal Sales Tax Act.
Section 6D of the Bengal Finance (Sales Tax) Act, 1941 was treated as a self-contained levy for works contracts, but its operation remains subject to article 286 of the Constitution and sections 3, 4 and 5 of the Central Sales Tax Act, 1956. The Tribunal declined to lay down a general rule on whether tax can arise both at the sub-contractor stage and again when the main contractor completes the contract, because that depends on the contractual terms and facts of each case. It also refused to answer abstract inter-State and import questions on hypothetical facts. Commodities otherwise taxable under the West Bengal Sales Tax Act, 1954 could still fall within section 6D for works contract purposes, so the challenge on double-taxation grounds failed.
Issues: (i) Whether, in a works contract executed through a sub-contractor, tax liability can arise at both the sub-contractor stage and again when the main contractor transfers the executed work to the contractee; (ii) Whether section 6D of the Bengal Finance (Sales Tax) Act, 1941 can be applied to transactions said to be in the course of inter-State trade or in the course of import, having regard to article 286 of the Constitution of India and sections 3, 4 and 5 of the Central Sales Tax Act, 1956; (iii) Whether section 6D and rule 48B can operate in respect of commodities already taxable under the West Bengal Sales Tax Act, 1954.
Issue (i): Whether, in a works contract executed through a sub-contractor, tax liability can arise at both the sub-contractor stage and again when the main contractor transfers the executed work to the contractee.
Analysis: The question was treated as hypothetical and dependent on the terms of the particular contract and the surrounding facts. If the sub-contractor is merely an agent of the contractor, no sale arises. If, on the other hand, there is in fact a deemed sale when the sub-contractor supplies and utilises materials in execution of his part of the work, that transaction may attract tax under section 6D. A further levy when the main contractor later executes the overall contract would depend on whether the facts disclose a separate deemed sale; no general rule could be laid down in the abstract.
Conclusion: The issue was left to be decided on the facts of individual cases; no general declaration was granted.
Issue (ii): Whether section 6D of the Bengal Finance (Sales Tax) Act, 1941 can be applied to transactions said to be in the course of inter-State trade or in the course of import, having regard to article 286 of the Constitution of India and sections 3, 4 and 5 of the Central Sales Tax Act, 1956.
Analysis: The decision recognised that the Forty-sixth Amendment did not remove the constitutional restrictions contained in article 286, and that those restrictions, read with the Central Sales Tax Act, 1956, continue to govern deemed sales under section 6D. At the same time, the applicability of those restrictions depends on the facts of the particular transaction. Because the arguments were presented on hypothetical situations rather than a concrete dispute, the Tribunal declined to pronounce upon the abstract questions raised.
Conclusion: No general ruling was given on the hypothesised inter-State or import situations, though the constitutional restrictions were stated to remain relevant.
Issue (iii): Whether section 6D and rule 48B can operate in respect of commodities already taxable under the West Bengal Sales Tax Act, 1954.
Analysis: Explanation 2 to section 6D was treated as making section 6D a self-contained code for works contract tax and as overriding the general position under the West Bengal Sales Tax Act, 1954, including the protection against second or subsequent sales. Accordingly, commodities otherwise taxable under the 1954 Act may still be treated, for the purpose of section 6D, as goods taxable under the 1941 Act when supplied in execution of a works contract, subject to the deductions and mechanics of section 6D itself.
Conclusion: The challenge on this ground failed; section 6D was held applicable notwithstanding prior taxation under the 1954 Act.
Final Conclusion: The application succeeded only in part. The Tribunal declined to issue broad rulings on the first two hypothetical questions, while upholding the applicability of section 6D in relation to commodities otherwise taxable under the 1954 Act.
Ratio Decidendi: In works contract taxation, constitutional restrictions under article 286 and the Central Sales Tax Act continue to operate, but section 6D functions as a self-contained levy that overrides the West Bengal Sales Tax Act, 1954 for commodities brought within its scope.