Delegated tax concession rules upheld where fiscal policy was clear and coal was validly excluded from raw materials.

A fiscal incentive scheme for new industrial units was upheld as valid because the Legislature had clearly set the policy of granting tax concession on raw materials used in manufacture and left only the identification or exclusion of specific items to delegated rules. Rule 2(f), which excluded coal from the definition of raw material, was therefore treated as a permissible exercise of ancillary rule-making power, not excessive delegation. The exclusion was also not treated as impermissibly retrospective, since the statutory scheme and refund provision operated subject to the State's power to prescribe excluded materials. On that basis, no refund or adjustment of tax paid on coal was available.

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Issues: (i) Whether section 4(4) of the Assam Industries (Sales Tax Concession) Act, 1986 and rule 2(f) of the Assam Industries (Sales Tax Concession) Rules, 1988 were ultra vires on the ground of excessive delegation; (ii) Whether rule 2(f), excluding coal from the definition of raw material, was invalid for retrospectivity and whether the petitioner was entitled to refund or adjustment of tax paid.

Issue (i): Whether section 4(4) of the Assam Industries (Sales Tax Concession) Act, 1986 and rule 2(f) of the Assam Industries (Sales Tax Concession) Rules, 1988 were ultra vires on the ground of excessive delegation.

Analysis: The Act was treated as a special fiscal measure implementing the State's industrial policy and granting tax concession to new industrial units. The legislative policy was held to be sufficiently clear: exemption was intended for raw materials used in manufacture, while the details of identifying and excluding particular raw materials were left to the rule-making authority. This was characterised as delegation of ancillary power to work out details within the framework of the policy, and not abdication of an essential legislative function.

Conclusion: Section 4(4) was held valid and not ultra vires on the ground of excessive delegation, and rule 2(f) was upheld as within delegated power.

Issue (ii): Whether rule 2(f), excluding coal from the definition of raw material, was invalid for retrospectivity and whether the petitioner was entitled to refund or adjustment of tax paid.

Analysis: The rule was brought into force along with the Act and was treated as co-extensive with the statutory scheme, including the proviso providing refund for the pre-commencement period. The exemption was held to be conditional and subject to the State's power under section 4(4) to prescribe or exclude raw materials. Since the legislative scheme expressly allowed such exclusion, the application of rule 2(f) to the earlier concession period was not treated as impermissible retrospectivity.

Conclusion: Rule 2(f) was held valid, and the petitioner was not entitled to refund or adjustment of tax paid on coal.

Final Conclusion: The challenge to the exclusion of coal from tax concession failed, and the writ petitions were dismissed, leaving the State's denial of refund and adjustment undisturbed.

Ratio Decidendi: Where a fiscal statute clearly states its policy and leaves only the identification or exclusion of items for concession to delegated rules, such delegation is valid and the resulting exclusionary rule may apply consistently with the statutory refund scheme.

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