Why India has an anti-defection law
India added the Tenth Schedule to the Constitution in 1985 to discourage elected legislators from switching parties for political office or other advantage. The basic idea is that an MP or MLA elected on a party ticket should not be able to abandon that mandate without consequences.
The law reduced some individual defections, but large group shifts and strategic resignations continue to test it. Critics also argue that the law gives party leaders too much control over how legislators vote.
Understanding the rules requires separating three questions: what counts as defection, when a group qualifies for the merger exception, and who decides disqualification.
When a party member can be disqualified
A legislator belonging to a political party may be disqualified if the member voluntarily gives up party membership or votes—otherwise abstains—against an official party direction without permission.
“Voluntarily gives up” is broader than a written resignation. Courts have held that conduct can show that a person has effectively left the party even if no formal letter was submitted. Public alignment with a rival group and actions inside or outside the House may become evidence.
A member who defies a party whip may avoid disqualification if the party gave prior permission or condones the action within 15 days.
Rules for independent and nominated members
An independent member is elected without a party ticket. If that member joins a political party after the election, the Tenth Schedule provides for disqualification.
A nominated member has a six-month window after entering the House to join a party. Joining after that period can attract disqualification.
These rules are designed to preserve the political status on which the member entered the legislature, although their application can still produce disputes about facts and timing.
What is the two-thirds merger exception?
The best-known exception applies when at least two-thirds of the members of a legislature party agree to a merger. Those members may join the merged party or choose to function separately without being disqualified under the merger provision.
The old protection for a one-third “split” was removed. This is why news reports focus on whether a rebel group has crossed the two-thirds threshold.
The number alone does not resolve every issue. Courts and presiding officers may examine the relationship between the original political party outside the House and the legislature party inside it, as well as the sequence of events.
Who decides a disqualification petition?
The Speaker or Chairman of the House decides petitions under the Tenth Schedule. When doing so, the presiding officer acts like a tribunal, and the final decision can be reviewed by courts.
Delay is a recurring controversy. The Constitution does not state a fixed deadline. The Supreme Court has said that, in ordinary circumstances, such petitions should be decided within a reasonable period and indicated three months in a 2020 judgment.
Critics question whether a Speaker dependent on a political majority can always act impartially. Reform proposals have suggested transferring the decision to the President or Governor acting on Election Commission advice, but that model has not replaced the current rule.
Does resignation avoid disqualification?
Resignation and defection proceedings can overlap. A member may resign before a vote, potentially changing the government's majority. Speakers can examine whether a resignation is voluntary and genuine, while a pending defection allegation may continue to affect the legal dispute.
The Supreme Court has allowed disqualified legislators to contest by-elections in circumstances where a Speaker attempted to bar them for the entire remaining term. The exact consequence depends on the constitutional text, the order and the court ruling in that case.
The democratic criticism
Party discipline can stabilise governments, but applying a whip to every legislative vote reduces independent judgment. An MP may believe a bill harms the constituency yet risk disqualification for voting against the party.
Committees have proposed limiting binding whips to votes that determine government survival, such as confidence motions and money bills. Supporters say that would preserve stability while allowing more genuine debate on ordinary legislation.
For more constitutional coverage, visit our Politics section. Our guide to how Indian general elections work explains the mandate that the anti-defection law seeks to protect.
This article is a general explainer and not legal advice. Individual cases depend on their facts and current court orders.
