Constitutional Architecture of GST in India: Concurrent Powers, Federal Institutions and Judicial Clarity
India's Pre-GST Indirect Tax Landscape and the Need for Reform
When India's Goods and Services Tax came into force on July 1, 2017, it represented the most sweeping transformation of the country's indirect tax structure since independence. To appreciate the significance of this shift, one must first understand the deeply siloed nature of the tax regime it replaced.
Under the constitutional framework that existed prior to the reform, taxing authority over goods and services was strictly bifurcated. The Central Government exercised exclusive jurisdiction over manufacturing-stage taxation through Central Excise Duty, and over services through Service Tax. State Governments, on the other hand, held independent authority to levy Value Added Tax on intra-state sale of goods, along with entry taxes such as Octroi at local levels.
This fragmented arrangement created serious economic distortions:
- Tax cascading became pervasive — taxes were imposed on previously taxed values at each stage of the supply chain, inflating costs for businesses and ultimately consumers
- Inter-state commerce was burdened by multiple checkpoints, divergent state-level tax rates, and cumbersome compliance obligations
- Input tax credit was unavailable across the goods-services divide, leading to significant embedded tax costs in final prices
The critical constitutional barrier to reform was equally stark. Under the original 1950 framework, neither Parliament nor State Legislatures possessed the power to simultaneously tax the supply of both goods and services. Bridging this gap required a direct amendment to the Constitution itself.
That amendment — the Constitution (One Hundred and First Amendment) Act, 2016 — introduced three foundational provisions: Article 246A, Article 269A, and Article 279A. Together, these articles restructured the economic relationship between the Centre and the States and provided the legal bedrock upon which the entire GST regime stands.
Key Constitutional Provisions Governing GST
Article 246A: The Source of Concurrent Legislative Authority
Article 246A is the cornerstone of the GST constitutional framework. It operates through a non-obstante clause, expressly overriding the conventional division of legislative power established under Article 246 and the Seventh Schedule of the Constitution of India.
The provision works through two distinct clauses:
- Clause (1) grants Parliament and every State Legislature concurrent authority to legislate on the levy of goods and services tax
- Clause (2) reserves exclusive legislative competence over inter-state trade and commerce to Parliament alone
This departure from the rigid exclusive-list model was unprecedented in Indian constitutional history. For the first time, both tiers of government — Union and States — were empowered to tax the same transaction simultaneously, albeit within a coordinated framework. Article 246A(5) also defines the scope of excluded goods, discussed separately below.
Article 269A: Governing Inter-State Supplies and Imports
Cross-border transactions introduce complexity in any federal tax system. Article 269A addresses this by establishing that the Integrated GST (IGST) applicable to inter-state supplies is levied and collected exclusively by the Union Government.
Post-collection, the proceeds are apportioned between the Union and the relevant consuming State in accordance with statutory rules, with recommendations from the GST Council guiding the distribution mechanism.
A particularly significant aspect of Article 269A is found in the Explanation to Article 269A(1), which treats imports of goods or services into India as inter-state supplies. This brings all cross-border trade firmly within the IGST framework, ensuring uniform treatment of imports and preventing jurisdictional ambiguity at the point of entry.