Municipal tax on mobile towers fails under Entry 49, but attached cabins remain taxable as buildings.

The Indian Telegraph Act, 1885 did not occupy the field so as to exclude State municipal taxation of mobile towers, because it regulated telegraph establishment and licensing while the Gujarat enactments operated in the distinct field of local taxation under the doctrine of pith and substance. For Entry 49 of List II, "building" must bear its ordinary common-parlance meaning; a steel mobile tower without walls or roof did not qualify and was more akin to plant and machinery. The attached cabin or shelter, however, had the attributes of a building and remained taxable. Accordingly, the impugned provisions were ultra vires to the extent they authorised tax on towers.

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Issues: (i) Whether the Indian Telegraph Act, 1885 occupied the field so as to exclude State legislation levying tax on mobile towers. (ii) Whether mobile towers were "buildings" within Entry 49 of List II and whether section 145A of the Gujarat Provincial Municipal Corporations Act, 1949 and similar provisions were within legislative competence.

Issue (i): Whether the Indian Telegraph Act, 1885 occupied the field so as to exclude State legislation levying tax on mobile towers.

Analysis: The scheme of the Indian Telegraph Act, 1885 was held to regulate the establishment, maintenance and working of telegraphs and the grant of licences for that purpose. The Gujarat municipal enactments, by contrast, operated in the distinct field of municipal taxation for local bodies. Applying the doctrine of pith and substance, the Court held that any overlap was only incidental and that the two enactments addressed different subjects. The State law authorising tax on mobile towers was therefore not excluded merely because mobile towers may also answer the description of telegraph for other purposes.

Conclusion: The State Legislature was not barred from enacting a tax on mobile towers on the ground that the Indian Telegraph Act, 1885 occupied the field.

Issue (ii): Whether mobile towers were "buildings" within Entry 49 of List II and whether section 145A of the Gujarat Provincial Municipal Corporations Act, 1949 and similar provisions were within legislative competence.

Analysis: The term "building" in Entry 49 had to be understood in its ordinary and common parlance sense, and not by reference to an expanded statutory definition in the impugned municipal enactment. On that test, the steel tower itself, lacking walls, roof and the normal attributes of a building, could not be treated as a building; it was more akin to plant and machinery. The cabin or shelter attached to the BTS system, however, had the characteristics of a building and remained taxable under the ordinary municipal regime. Since the impugned levy was directed at the tower structure, the legislative foundation under Entry 49 failed to that extent. The challenge based on excessive delegation was not separately sustained in view of the broader invalidity.

Conclusion: Section 145A of the Gujarat Provincial Municipal Corporations Act, 1949 and similar provisions were ultra vires to the extent they authorised tax on mobile towers, though the cabin or shelter remained exigible to tax as a building.

Final Conclusion: The tax levies on mobile tower structures were struck down, while municipal authorities retained power to tax the associated cabin structures under the ordinary property-tax regime. The connected tax bills were therefore invalid to the extent they treated the towers as taxable buildings, and the petitions succeeded in part.

Ratio Decidendi: For purposes of legislative competence under Entry 49 of List II, a structure can be taxed as a building only if it bears the ordinary attributes of a building as understood in common parlance; a mobile tower lacking walls and roof does not qualify, and a State may not enlarge that constitutional entry by an expansive statutory definition.

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