101st Constitutional Amendment Act (GST), 2016

The 101st Constitutional Amendment Act, 2016, enacted as the Constitution (One Hundred and First Amendment) Act, received presidential assent on 8 September 2016 after passage by the Lok Sabha and Rajya Sabha in August 2016 and ratification by more than half the state legislatures, as required for amendments touching the federal distribution of powers under the proviso to Article 368(2). The legislation gave effect to the Goods and Services Tax (GST), a destination-based consumption tax conceived to subsume a fragmented architecture of central and state indirect levies. Its statutory genesis lay in the insertion of Article 246A, which for the first time conferred a concurrent, source-defining power on both Parliament and state legislatures to legislate on the taxation of goods and services, departing from the rigid List I–List II separation that had governed indirect taxation since 1950. The Act was the constitutional precondition for the four implementing statutes—the CGST, IGST, UTGST, and GST (Compensation to States) Acts—passed in 2017, with the unified tax taking effect at midnight on 1 July 2017.

The procedural architecture rests on a cluster of newly inserted or substituted provisions. Article 246A empowers both the Union and the states to tax intra-state supplies, while reserving exclusively to Parliament, under Article 246A(2), the power to tax inter-state supply. Article 269A operationalises the latter by levying Integrated GST (IGST) on inter-state trade and on imports, with the Union collecting and then apportioning the proceeds between the Centre and the consuming state—the mechanism that makes GST genuinely destination-based. Article 270 was amended to govern the distribution of the central component of GST among the states. The single most consequential institutional innovation is Article 279A, which mandated the President to constitute the GST Council within sixty days of commencement; the Council was duly notified on 12 September 2016. It is chaired by the Union Finance Minister, with the Union Minister of State for Finance and the finance or taxation minister of every state as members, and functions as the cooperative federal forum that recommends rates, exemptions, threshold limits, model laws, and the special provisions for the north-eastern and hill states.

Decision-making within the Council follows a weighted formula prescribed by Article 279A(9): every decision requires a three-fourths majority of weighted votes of members present and voting, with the Union government commanding one-third of the total votes and all state governments together holding the remaining two-thirds. The quorum is one-half of the total membership. The Act also amended Article 366 by inserting clauses (12A) and (26A), defining "goods and services tax" and "services" respectively, and amended Article 286, which restricts state taxation of inter-state supplies. Certain commodities were kept outside or partially outside GST: alcohol for human consumption was constitutionally excluded, while petroleum crude, diesel, petrol, natural gas, and aviation turbine fuel were brought within Article 246A but subjected to GST only from a future date to be notified by the Council, leaving them under the older excise-and-VAT regime in the interim.

In practice, the Council—headquartered in New Delhi and serviced by a secretariat under the Department of Revenue—has met more than fifty times since its first sitting in September 2016, setting the principal rate slabs of 5, 12, 18, and 28 percent plus a compensation cess on demerit and luxury goods. Successive Union Finance Ministers, including Arun Jaitley and later Nirmala Sitharaman, have chaired sittings that resolved contentious questions on rates for textiles, online gaming, and food items. State finance ministers from West Bengal, Tamil Nadu, Punjab, and Kerala have repeatedly pressed federal-balance concerns within the forum, making the Council the most visible laboratory of Indian cooperative federalism in the post-2016 era.

The 101st Amendment must be distinguished from the implementing CGST and IGST Acts, which are ordinary central statutes operationalising powers the amendment created; the amendment itself is constitutional and supplies only the enabling framework. It is likewise distinct from the pre-2017 VAT and central excise regimes it replaced, and from the Finance Commission mechanism under Article 280, which addresses vertical and horizontal devolution of the divisible pool rather than indirect-tax design. The Council under Article 279A is also separate from the Inter-State Council under Article 263, the latter being a broader advisory body on Centre–state relations.

Controversy has attended the Act's federal implications. In Union of India v. Mohit Minerals (2022), the Supreme Court held that the GST Council's recommendations are not binding on either Parliament or the state legislatures, characterising them as persuasive and emphasising that both tiers possess simultaneous legislative power under Article 246A—a ruling that recalibrated assumed Union dominance over the forum. The expiry of the five-year compensation guarantee under the Compensation to States Act on 30 June 2022 reopened fiscal-stress debates, with several states demanding extension amid pandemic-era revenue shortfalls. The continued exclusion of petroleum products and the persistence of the compensation cess remain live policy questions before the Council.

For the working practitioner, the 101st Amendment is the constitutional anchor of India's single largest indirect-tax reform and a recurring touchstone in fiscal-federalism analysis. Diplomats and trade officers cite it as evidence of India's move toward a unified national market; policy researchers track Council voting dynamics as a barometer of Centre–state bargaining; and UPSC candidates must command Articles 246A, 269A, and 279A, the ratification requirement under Article 368, and the Mohit Minerals holding. Mastery of this single amendment unlocks the legal logic of how a federal polity reconciled tax sovereignty with a common market.