What Happened
- The Constitution (131st Amendment) Bill, 2026 — the constitutional backbone of the government's women's reservation and delimitation package — failed the floor test in the Lok Sabha on April 17, 2026.
- The NDA alliance, with approximately 293 seats in the 543-seat Lok Sabha, secured 298 votes in favour but needed 352 (two-thirds of the 528 present and voting) to pass the constitutional amendment.
- A united opposition bloc of approximately 230 votes defeated the measure — in a rare instance of the INDIA bloc holding together completely on a constitutional vote.
- The bill's defeat immediately triggered the withdrawal of the linked Delimitation Bill, 2026 and the Union Territories Laws (Amendment) Bill, 2026.
- This marks the first instance of the NDA government failing to pass a constitutional amendment bill in the Lok Sabha since 2014.
Static Topic Bridges
Floor Test vs. Constitutional Majority: Key Distinctions
In parliamentary parlance, a "floor test" typically refers to a vote of confidence — testing whether a government commands majority support on the floor of the House. In a broader sense, any division vote tests a bill on the floor. For constitutional amendment bills, the relevant test is not the government's ability to remain in power (simple majority = more than half of 272 members present and voting) but the bill's ability to cross the two-thirds threshold of members present and voting. A government can survive a no-confidence motion with a simple majority while simultaneously failing to pass a constitutional amendment that requires a supermajority.
- Simple majority (Article 100): more than half of members present and voting — applies to ordinary legislation
- Absolute majority: majority of total membership (at least 272 of 543) — applies to some specific constitutional provisions
- Special majority (Article 368): two-thirds of members present and voting AND majority of total membership — applies to constitutional amendments
- Effective majority: more than half of the effective strength (total membership minus vacancies) — applies to Rajya Sabha removal of Vice President
- No-confidence motion: requires simple majority under Article 75(3) — not relevant here but a common UPSC comparison point
Connection to this news: The NDA's ~293 seats gave it a comfortable simple majority but was structurally insufficient for a two-thirds supermajority without opposition support. The term "floor test" here is used loosely — what was actually tested was the government's ability to secure a special constitutional majority.
NDA's Lok Sabha Arithmetic and the Supermajority Problem
The 2024 Lok Sabha elections returned the NDA with approximately 293 seats out of 543 — BJP alone won 240 seats, falling short of the 272 majority mark on its own. The coalition arithmetic means the government's working majority depends on allies. For ordinary legislation, 272+ votes suffice. For constitutional amendments, the bar rises to 362 (two-thirds of the total strength of 543) if all members are present, or 352 of 528 present and voting in this instance. No single party in Indian history has commanded a two-thirds majority in the Lok Sabha since the 1970s — constitutional amendments have therefore always required some degree of cross-party consensus.
- BJP's 2024 Lok Sabha seats: approximately 240 (short of the 272 simple majority mark)
- NDA total 2024: approximately 293 seats
- INDIA bloc approximate strength: approximately 230 seats
- Two-thirds of 543 total sanctioned strength: 362 votes (required if all present)
- Two-thirds of 528 present and voting: 352 votes (required in this specific vote)
- Government secured: 298 votes (some non-NDA members may have voted with government)
- Historical context: Congress-led governments routinely commanded two-thirds+ majorities in the 1950s-70s, enabling multiple constitutional amendments without opposition support
Connection to this news: The defeat illustrates that the NDA's current Lok Sabha strength — while sufficient for governing — is insufficient for unilateral constitutional change. The government required approximately 59 more votes than it received.
Consequences of a Failed Constitutional Amendment Bill
When a constitutional amendment bill is defeated in one House of Parliament, it lapses — there is no provision for a second reading in the same session or a joint sitting. The government may re-introduce the bill in a future session. However, re-introduction requires renewed political will, fresh parliamentary time, and potentially a different political context. Legislative lapse may also require re-tabling the bill from scratch in a future Lok Sabha if the current Lok Sabha is dissolved before the bill is re-introduced and passed.
- Article 107(3): if a bill lapses due to dissolution of Lok Sabha, it does not survive into the next Lok Sabha (no protection for bills pending in Parliament at dissolution)
- Constitutional amendment bills have no special continuity provision — they must be reintroduced if they lapse
- The linked ordinary bills (Delimitation Bill, UT Laws Amendment Bill) can be re-introduced independently, but only after a future constitutional amendment creates the enabling framework
- Political consequence: the defeat creates momentum for a renegotiated approach to delimitation — potentially using the 2027 Census and including OBC sub-quotas
Connection to this news: The 131st Amendment Bill's defeat means the government must either accept the 2027 Census timeline and potentially include OBC sub-quotas in a future constitutional amendment, or find a path to build the supermajority coalition it lacked in April 2026.
Key Facts & Data
- Vote: 298 ayes, 230 noes, 0 abstentions; 528 present and voting
- Required: 352 (two-thirds of 528)
- Shortfall: 54 votes
- NDA approximate strength: ~293 seats; INDIA bloc: ~230 seats
- Two-thirds of total Lok Sabha strength (543): 362 votes (if all members present)
- First NDA constitutional amendment bill defeat since 2014
- Bills withdrawn after defeat: Delimitation Bill 2026, UT Laws Amendment Bill 2026
- Proposed Lok Sabha strength under 131st Amendment: 850 seats (815 from states + 35 from UTs)
- Current Lok Sabha strength: 543 seats (based on 1971 Census data, frozen since 42nd Amendment 1976)
- 106th Amendment (women's reservation) notified April 16, 2026 — day before the defeat
- Without new enabling legislation, women's reservation cannot be implemented before the 2034 General Elections