NHPC Ltd. vs State of Himachal Pradesh Secretary & Ors.
Background
NHPC Ltd. and the Bhakra Beas Management Board run hydro-power and irrigation projects in remote parts of Himachal Pradesh and, as a welfare measure, ran their own buses free of charge to ferry employees to work sites and employees' children to school. The State's tax authorities sought to levy "passenger tax" on this free transport under the Himachal Pradesh Passengers and Goods Taxation Act, 1955. The companies had earlier won a High Court ruling (1997) that the Act's wording didn't cover non-fare-paying passengers, but the State Legislature then amended the Act (the 1997 Amendment and Validation Act) specifically to bring free/gratis passengers within the tax net, and the High Court upheld this amendment and the fresh tax demands, prompting these appeals to the Supreme Court.
Decision Breakdown
The Supreme Court held that the 1997 Amendment and Validation Act was a valid exercise of the State Legislature's power under Entry 56, List II of the Constitution (taxes on passengers and goods carried by road), and that it had validly cured the earlier defects the High Court had identified: the tax is on the passengers/goods, not on the vehicles themselves, and employers who don't collect the fare from their "free-riding" employees must bear the tax themselves as a statutory duty. The Court agreed that the companies' free transport of employees and their children is a taxable activity under the amended law. However, exercising its special discretionary power under Article 142, given that about 26 years had passed and the companies are public sector bodies (not private bus operators) that had genuinely relied on the earlier favourable ruling, the Court limited the tax liability to prospective effect only: payable from 1 April 2023 onward, with no liability for the entire back period in dispute.
Lesson Learnt
A state legislature can retrospectively amend a tax law to close a loophole exposed by a court ruling, and free/non-fare transport can still be taxed as a "passenger" activity if the law is worded to cover it, but courts retain discretion to soften the practical impact (e.g., making liability apply only going forward) where a long, good-faith reliance on an earlier ruling would otherwise cause unfair hardship, especially to public-sector bodies.