Public publication governs delegated legislation, and timely exemption intimation can defeat motor vehicle tax liability.

Delegated legislation affecting motor vehicle tax liabilities takes effect only when the Gazette notification is reasonably made available to the public, not merely on the date printed on the Gazette. Applying that principle, the Kerala Motor Vehicles Taxation Rules, 1975 were treated as operative from public release. Read with Section 5(1) and Rule 10(1), an intimation seeking exemption from tax was valid when filed within one week of that release. Because the vehicles were not used on the roads during the relevant period, the demand for tax for that quarter was held unsustainable and the exemption claims were treated as valid.

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Issues: (i) Whether the Kerala Motor Vehicles Taxation Rules, 1975 came into force only when the Gazette copies were released to the public, or from the date borne on the Gazette; (ii) Whether an intimation seeking exemption from tax under Section 5(1) of the Kerala Motor Vehicles Taxation Act, 1976 was in time when it was given within one week of the public release of the Rules, and whether tax could be levied for the relevant quarter despite non-use of the vehicles.

Issue (i): Whether the Kerala Motor Vehicles Taxation Rules, 1975 came into force only when the Gazette copies were released to the public, or from the date borne on the Gazette.

Analysis: The rule-making power under Section 28 required the Rules to be made by notification in the Gazette. The statutory scheme was examined in the light of the distinction between plenary legislation and subordinate legislation. The controlling principle applied was that delegated legislation must be promulgated or published in a manner reasonably calculated to make it known to those affected by it; mere printing or dating of the Gazette is not enough if the Gazette was not made available to the public. The earlier contrary view that publication was unnecessary was held to be unsound.

Conclusion: The Rules came into force only when the Gazette containing them was released to the public, not on the earlier printed date.

Issue (ii): Whether an intimation seeking exemption from tax under Section 5(1) of the Kerala Motor Vehicles Taxation Act, 1976 was in time when it was given within one week of the public release of the Rules, and whether tax could be levied for the relevant quarter despite non-use of the vehicles.

Analysis: Section 5(1) and Rule 10(1) were read together as permitting exemption where intimation was given within the period prescribed by the Rules, and the rule-making authority had relaxed the strictness of the section. The Court also accepted the departmental concession that exemption was available for any month, two months, a quarter, or a year, so long as the statutory requirements were met. Since the intimation was given within one week of the public release of the Rules, the claim for exemption for the relevant period could not be rejected on delay. On the facts, the vehicles were not used on the roads during the period in question.

Conclusion: The intimation was within time and the demand for vehicle tax for the relevant period was unsustainable.

Final Conclusion: The exemption claims were held to be valid, the impugned tax demands for the disputed quarter were set aside, and the writ petitions were allowed.

Ratio Decidendi: Subordinate legislation that regulates citizens' liabilities takes effect only upon reasonable publication or notification to the public, and where the governing rule permits exemption on timely intimation, such intimation is valid if made within the period prescribed from the date the rule is actually made available to those affected.

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