Why the numbers matter in the renewed push for delimitation | Explained
Parliament's Monsoon Session has renewed focus on the pending constitutional amendment package needed to enable delimitation, with attention centred on whether the ruling alliance can cross the two-thirds threshold required in each House.
Estimates put the number needed to secure a two-thirds majority, if all members participate in voting, at around 360 votes in the Lok Sabha; the ruling alliance's current strength is reported to fall short of this by roughly three dozen seats.
Passage requires either garnering additional support from non-aligned parties or securing abstentions that reduce the base used to calculate "members present and voting," since abstaining members are excluded from that count.
Failure to secure the two-thirds special majority would mean the constitutional amendment enabling delimitation cannot be passed, irrespective of the ruling alliance being the single largest bloc.
Special Majority under Article 368
Article 368 of the Constitution lays down the procedure for constitutional amendments. Most amendments — including one altering the number of seats in the Lok Sabha or triggering delimitation — require a "special majority": passage in each House by (a) a majority of the total membership of that House, and (b) a majority of not less than two-thirds of the members of that House present and voting. Some amendments affecting federal provisions (e.g., relating to the election of the President under Article 54/55, or the distribution of legislative powers) additionally need ratification by at least one-half of state legislatures.
Key Details
- Article 368(2) is the operative clause: it requires the Bill to be passed in each House separately — a joint sitting under Article 108 is not available for constitutional amendment bills.
- "Two-thirds of members present and voting" is calculated only on those who actually vote (for or against); members who abstain are excluded from the denominator, which is why abstentions — not just votes in favour — can help a coalition clear the threshold.
- This differs from a "simple majority" (more than 50% of members present and voting, used for ordinary legislation) and an "effective majority" (more than 50% of the House's effective strength, excluding vacancies, used for removing the Vice-President or Speaker/Deputy Speaker).
- The Lok Sabha's total sanctioned strength is currently 543; the "around 360" figure cited for two-thirds reflects a scenario where nearly all members are present and voting across both Houses.
The push for delimitation cannot proceed as an ordinary law — because it involves a Constitution Amendment Bill (altering Article 82 and related seat-related provisions), it must clear the Article 368 special-majority bar in both Houses, which is why the ruling alliance's exact seat count, and the behaviour of non-aligned parties (support versus abstention), is being closely tracked ahead of the vote.
Delimitation and the Seat-Number Freeze
Delimitation is the exercise of redrawing constituency boundaries and reallocating seats among states based on updated population figures, carried out under Article 82 (for the Lok Sabha and states) after every census. To prevent states that controlled population growth from being penalised with fewer seats relative to high-growth states, Parliament froze the total number of Lok Sabha and Assembly seats.
Key Details
- The 42nd Constitutional Amendment Act, 1976 first froze Lok Sabha and Assembly seat numbers at 1971-census levels until the first census after 2000.
- The 84th Constitutional Amendment Act, 2001 extended this freeze to the first census taken after 2026, while permitting constituency boundaries (not total seat numbers) to be redrawn using 2001 census data.
- The 87th Constitutional Amendment Act, 2003 clarified that this constituency redrawing would use the 2001 census population figures.
- Any move to end the freeze earlier, or to expand the Lok Sabha's total strength, requires a fresh constitutional amendment — the one now before Parliament — cleared by the Article 368 special majority described above.
The pending Bills would end the seat freeze ahead of schedule and expand the Lok Sabha, which is exactly why the special-majority arithmetic — not a simple majority — governs whether the exercise can move forward this session.
- Two-thirds threshold for the current Lok Sabha strength works out to roughly 360 votes if all members are present and voting.
- 543 — sanctioned strength of the existing Lok Sabha.
- 1976 (42nd Amendment) — first freeze on seat numbers; 2001 (84th Amendment) — freeze extended to the first census after 2026; 2003 (87th Amendment) — clarified use of 2001 census data for constituency boundaries.
- Constitutional amendments under Article 368 need a special majority (majority of total membership + two-thirds of members present and voting) in each House separately; some also need ratification by half the state legislatures.