# Constitutional Backbone of GST
India's Constitution is a three-tier federal tax structure — Union, State, and Local. Pre-GST, the Centre and States had mutually exclusive tax powers (Centre: manufacture/services; State: sale of goods). GST needed concurrent power on the same supply → required a constitutional amendment.
## The starting point — basic articles
- Article 265: 'No tax shall be levied or collected except by authority of law.' The bedrock principle.
- Article 245: Parliament can make laws for whole/part of India; State legislatures for whole/part of their State. Extraterritorial operation cannot invalidate a Parliamentary law.
- Article 246: Distributes legislative power between Centre and States.
- Seventh Schedule to Article 246: Three Lists —
- List I (Union): Entries 82–91 are tax entries (Income tax = Entry 82, Customs = Entry 83).
- List II (State): Entries 45–63 are tax entries.
- List III (Concurrent): Both can legislate.
## Why constitutional amendment was needed
Before GST:
- Centre levied: Excise (Entry 84), Service Tax, Customs, CST.
- States levied: VAT, Entry tax, Luxury tax, Entertainment tax, Octroi.
GST requires both to tax the same supply concurrently — which Article 246 did not permit. Hence the Constitution (101st Amendment) Act, 2016 — 20 sections; Article 279A notified on 12 September 2016; remaining provisions notified on 16 September 2016.
## The new and amended articles
### Article 246A (NEWLY INSERTED) — heart of GST
- Empowers both Centre and States to make laws for levy of GST.
- Centre has exclusive power for GST on inter-State supplies.
- Operates notwithstanding Articles 246 and 254 (which deal with parliamentary supremacy).
### Article 248 (amended)
Parliament's residuary power to legislate on matters not in any List is now subject to Article 246A — so GST takes priority over residuary power.
### Articles 249 and 250 (amended)
Parliament can legislate on State-List matters in the national interest (by ≥ 2/3rd majority of members present and voting) or during a Proclamation of Emergency — extended to GST under Article 246A.
### Article 268 (amended)
This covered duties levied by Centre but collected by States. The CAA omits 'excise duties on medicinal & toilet preparations' since they are now under GST.
### Article 268A (omitted)
Service tax (originally Entry 97 of Union List; moved to Entry 92C by the 88th Amendment, 2003) was carved into Article 268A — but never operationalised. The CAA omits it.
### Article 269A (NEW) — Inter-State GST
- GST on inter-State supply is levied and collected by the Government of India.
- Apportioned between Union and States as per law on GST Council recommendation.
- Imports are deemed inter-State trade → IGST replaces erstwhile CVD/SAD.
- If IGST is used towards SGST (or vice versa), the amount does not go to the Consolidated Fund of India / State.
- Parliament shall define the principles for place of supply for inter-State trade.
### Article 270 (amended)
Distributes GST between Centre and States based on Finance Commission recommendations, for taxes levied under Articles 246A(1), (2) and 269A(1).
### Article 271 (amended)
Parliament's power to levy surcharges under Articles 269/270 is excluded for GST — Centre cannot unilaterally surcharge GST.
### Article 286 (amended)
Restricts States from taxing supplies outside the State or in the course of import/export. CAA replaced 'sale/purchase' with 'supply' and 'goods' with 'goods/services/both'.
### Article 366 — KEY DEFINITIONS
- Article 366(12A): 'Goods and services tax' means any tax on supply of goods, or services, or both, except taxes on supply of alcoholic liquor for human consumption.
- Article 366(26A): 'Services' means anything other than goods.
- Article 366(26B): 'State' includes a Union Territory with legislature.
### Article 368 (amended)
Any amendment of Article 279A (GST Council) requires:
- Two-thirds majority in Parliament, and
- Ratification by at least half of the States.
## Memory grid
| Article | Quick label |
|---|---|
| 246A | Power to levy GST (both Centre & State; Centre alone for inter-State) |
| 248 | Residuary power, subject to 246A |
| 249/250 | Parliament's power on State-List matters (incl. GST) in national interest/emergency |
| 268 | Stamp duties etc. — medicinal/toilet excise excluded |
| 268A | Omitted (service tax) |
| 269A | Inter-State GST levy & apportionment |
| 270 | Distribution of GST |
| 271 | No surcharge on GST |
| 279A | GST Council |
| 286 | Restriction on States on inter-State/import/export supplies |
| 366 | Definitions |
| 368 | Amendment process incl. 279A |