Sales tax rule-making power upheld with prospective operation, valid filing deadline, and limited authority to specify raw materials.

Substituted rule 46A under the Assam Finance (Sales Tax) framework was upheld against challenge for want of previous publication because it was traceable to the specific rule-making power in section 24A(2), which displaced the general publication requirement. The rule could not validly operate retrospectively in the absence of statutory authorisation and was effective only from its actual notification date. Construed prospectively, the three-month application period was not unconstitutional under article 19. The power to specify raw materials under sub-rule (3) was also sustained when confined to regulating, and not defeating, the concession for goods ordinarily treated as raw materials.

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Issues: (i) whether the substituted rule 46A was invalid for want of previous publication; (ii) whether the rule could operate retrospectively from 1 January 1968; (iii) whether the time-limit of three months for filing applications was unconstitutional; and (iv) whether the power under sub-rule (3) to specify raw materials was ultra vires the enabling provision.

Issue (i): whether the substituted rule 46A was invalid for want of previous publication.

Analysis: The governing provision was section 24A(2) of the Assam Finance (Sales Tax) Act, 1956, which specifically empowered the State Government to make rules laying down the circumstances and conditions for grant of drawback, set-off or refund. That specific power prevailed over the general rule-making provision in section 39, which carried a condition of previous publication. Since the rule was traceable to section 24A(2), the omission of previous publication did not invalidate it.

Conclusion: The challenge based on absence of previous publication failed and the rule was upheld on this ground.

Issue (ii): whether the rule could operate retrospectively from 1 January 1968.

Analysis: The Act did not authorise retrospective rule-making. A delegated authority cannot confer retrospective effect on a rule unless the parent statute permits it. The retrospective part of the substitution therefore could not stand, and the rule was treated as effective only from the date of its actual notification.

Conclusion: The rule was not validly retrospective and was effective only from 2 November 1971.

Issue (iii): whether the time-limit of three months for filing applications was unconstitutional.

Analysis: Once the rule was held to operate only from 2 November 1971, the three-month filing period had to be applied only to sales occurring on or after that date. So construed, the condition did not impose an impossible obligation and did not violate article 19 of the Constitution of India.

Conclusion: The time-limit was upheld as valid on a prospective construction.

Issue (iv): whether the power under sub-rule (3) to specify raw materials was ultra vires the enabling provision.

Analysis: Section 24A(2) permitted rules to specify the circumstances and conditions for granting the concession. The power to specify raw materials under sub-rule (3) could not be used to defeat the statutory benefit by excluding goods that were ordinarily raw materials, but it could regulate the class of goods which, in ordinary parlance, might not be treated as raw materials. Read in that limited manner, the provision remained within the rule-making power.

Conclusion: Sub-rule (3) was not struck down as ultra vires.

Final Conclusion: The substituted rule was substantially upheld, but it could not operate retrospectively; the petitioners were entitled to the concession for the period covered by the earlier rule up to 30 September 1971.

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