Annual tax liability and mid-year deduction rules apply to the whole assessment year unless prospectively limited.

Liability under the Central Sales Tax Act was treated as annual because the charging provision applied to sales during a year and the assessment machinery followed the same yearly basis. On that construction, a notification or deduction introduced during the relevant year applied to the whole assessment year unless the statute or instrument limited it prospectively. Sub-rule (2) of rule 11, inserted on 6 November 1957, was therefore held to operate from 1 July 1957, making the deduction available for the earlier part of the year. The remaining questions were not pressed and were left unanswered.

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Issues: (i) Whether liability to tax under the Central Sales Tax Act, 1956, was yearly; (ii) whether sub-rule (2) of rule 11 of the Central Sales Tax (Registration and Turnover) Rules, 1957, inserted by notification dated 6 November 1957, operated retrospectively from 1 July 1957.

Issue (i): Whether liability to tax under the Central Sales Tax Act, 1956, was yearly.

Analysis: The charging provision imposed liability on sales effected during any year, and the assessment machinery adopted from the State law also required assessment separately for each year. The statutory scheme therefore treated both chargeability and assessment as annual. On that construction, any notification coming into force during the year governed the whole assessment year unless the statute or notification provided otherwise.

Conclusion: The liability to tax under the Central Sales Tax Act, 1956, was yearly and not confined to a different period.

Issue (ii): Whether sub-rule (2) of rule 11 of the Central Sales Tax (Registration and Turnover) Rules, 1957, inserted by notification dated 6 November 1957, operated retrospectively from 1 July 1957.

Analysis: The rule concerned deductions in determining turnover for the purposes of section 8, and it was inserted during the relevant assessment year. Since the tax liability and assessment were annual, the later notification was treated as affecting the year as a whole. The Court applied the same principle recognised in the controlling authority that an exemption or deduction introduced in the course of a tax year operates for that year unless the enactment or notification restricts it prospectively.

Conclusion: The rule was held to operate retrospectively from 1 July 1957, and the deduction was allowable for the earlier part of the year.

Final Conclusion: The reference was answered against the assessee on the question of annual liability but in favour of the assessee on the retrospective operation of the deduction rule, with the remaining questions not pressed and left unanswered.

Ratio Decidendi: Where a taxing statute imposes liability and adopts assessment on an annual basis, a notification or deduction introduced during the relevant year applies to that entire year unless the statute or notification clearly limits its operation prospectively.

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