The anti-defection law decides when an elected member loses their seat for switching sides. It sits in the Tenth Schedule of the Constitution, added by the Fifty-second Amendment in 1985, and it explains a great deal of what happens when a government’s majority becomes uncertain.
What triggers disqualification
For a member elected on a party ticket, two things:
- Voluntarily giving up membership of that party. Courts have read this more widely than formal resignation; conduct such as publicly campaigning against the party can count.
- Voting, or abstaining, against the party whip, unless the party condones it within fifteen days.
An independent member is disqualified if they join any party after being elected. A nominated member may join a party within six months of taking their seat, but not afterwards.
The merger exception
One route survives. If two-thirds of a legislature party agree to merge with another party, they are not disqualified.
The original law also protected a split by one-third of members, which made group defections straightforward. That exception was removed by the Ninety-first Amendment in 2003, leaving only the higher two-thirds merger threshold.
This is why defections now tend to arrive either as a single resignation or as a large bloc. The arithmetic of the Tenth Schedule shapes the form they take.
Who decides
The Speaker or Chairman of the House decides, not a court or the Election Commission.
That is the most criticised feature of the law. The presiding officer is usually elected on a party ticket, and no time limit is written into the Tenth Schedule for deciding a petition. A decision deferred through the remainder of a term produces the same practical result as dismissing it.
The Supreme Court has held that the Speaker’s decision is subject to judicial review, and has urged that petitions be decided within a reasonable period, commonly framed as around three months. Delay remains a recurring feature.
What it means for you
You vote for a person, not a party, as our explainer on how Indian elections work sets out. The anti-defection law is the mechanism that ties that person to the party label they carried on the ballot.
It also constrains your representative. On any matter where a whip is issued, an MLA or MP votes with their party or risks their seat. Independent judgement on a whipped vote is not a practical option.
Whether that is good for democracy is genuinely contested. It was introduced to stop the era of members changing sides for office, and it did. The cost is a legislature where individual conscience has little room, and where power shifts from members to party leaderships.
Disqualification and what follows
A disqualified member loses their seat, and the vacancy is normally filled by a by-election. The winner serves only the remainder of the original term.
Disqualification under the Tenth Schedule does not by itself bar someone from contesting that by-election, which is why a resigned member can reappear on the ballot within months, often under a different symbol.
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