Retrospective withdrawal of sales tax exemption is invalid without clear statutory authority

Retrospective withdrawal of a sales tax exemption was impermissible where the enabling provision did not expressly or by necessary implication authorise retrospectivity. The Government Order attempting to withdraw the exemption on cycle tyres and tubes from the same date it had operated was held to be beyond delegated power. Section 9 of the A.P. General Sales Tax Act did not permit such retrospective action, and the later insertion of section 39(2A) did not validate the impugned notification. The assessments were therefore required to be revised by excluding the period covered by the invalid retrospective withdrawal, and relief was granted to that extent.

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Issues: Whether the Government could, under section 9 of the A.P. General Sales Tax Act, withdraw an exemption from sales tax with retrospective effect so as to validate provisional assessments on cycle tyres and tubes for the past period.

Analysis: The exemption in favour of sales of cycle tyres and tubes had operated from 15 June 1987, and the impugned Government Order sought to withdraw that exemption retrospectively from the same date. The controlling principle applied was that a delegate can make a notification with retrospective effect only if the enabling provision expressly or by necessary implication authorises such retrospectivity. Section 9 of the Act was found not to confer any such power, and the later introduction of section 39(2A) did not enlarge the power under section 9 for the impugned notification. The attempted retrospective withdrawal therefore exceeded the Government's authority.

Conclusion: The retrospective withdrawal of exemption was invalid and without authority of law. The assessments were required to be revised by excluding the period covered by the impermissible retrospective withdrawal, and the writ petitions were allowed to that extent.

Final Conclusion: Retrospective modification of a tax exemption by subordinate executive action was held impermissible in the absence of clear legislative authority, and the petitioners obtained relief against the tax demand for the affected period.

Ratio Decidendi: A delegated authority cannot issue a tax exemption or withdrawal notification with retrospective effect unless the enabling statute expressly or by necessary implication authorises retrospectivity.

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