Until 1985, an Indian MP or MLA could change parties after winning election with no constitutional consequence. The result was rampant defection — politicians switching parties for ministerships, financial gain, or political opportunity. State governments rose and fell on bulk defections. The 52nd Amendment of 1985 changed this. It added the Tenth Schedule to the Constitution, codifying the Anti-Defection Law. Defection from one's party became a ground for disqualification from the legislature. The Speaker (or Chairman in the Rajya Sabha / Legislative Council) decides; judicial review is available. The 91st Amendment of 2003 tightened the regime by removing the "split" exception. The 2014 Prelims tested where the law sits in the Constitution; the 2022 Prelims tested operational details.
Origin — bulk defection and the 52nd Amendment
The Indian political system in the 1960s and 1970s saw extensive party-switching. The phrase "Aaya Ram Gaya Ram" — coined after a Haryana MLA who changed parties three times in a single day in 1967 — captured the public mood. Defection was widely seen as corruption: legislators were elected on a party programme, then changed parties for personal benefit, betraying the voters who had elected them on the original programme.
By the early 1980s, the political consensus had built up to enact a law against defection. The Rajiv Gandhi government, with a comfortable Congress majority after the 1984 election, brought the Constitution (Fifty-Second Amendment) Bill in 1985. The Bill was passed quickly and added the Tenth Schedule to the Constitution. It came into force on 1 March 1985.
The 52nd Amendment also amended four other Articles — 101(3)(a), 102(2), 190(3)(a), and 191(2) — to provide that disqualification under the Tenth Schedule has the same effect as other disqualifications.
The 2014 Prelims tested where exactly the Anti-Defection Law sits in the Constitution.
Grounds for disqualification
Paragraph 2 of the Tenth Schedule lists the grounds for disqualification. Three categories:
For members elected on a party ticket (most members):
Ground 1 — voluntarily giving up membership of the party. The member need not formally resign; "voluntary giving up" can be inferred from conduct (joining another party, attending another party's functions, openly opposing the party's position).
Ground 2 — voting or abstaining from voting in the House contrary to a direction (whip) issued by the political party, without obtaining prior permission and without being condoned within 15 days. The whip is the party direction; defying it triggers disqualification.
For nominated members:
Ground 3 — joining any political party within six months of being nominated to the House. Nominated members are not affiliated with any party at the time of nomination; they get a six-month grace period to join one. Joining after six months triggers disqualification.
For independent members (members who won as independents):
Ground 4 — joining any political party at any time after election. An independent who joins a party loses the seat. The voters elected an independent; the member cannot betray that mandate by joining a party.
The 2022 Prelims tested specific operational details:
- The law specifies that a nominated legislator cannot join any political party within six months of being appointed to the House.
- The law does not provide any time-frame within which the presiding officer has to decide a defection case.
Exceptions — split, merger, and the 91st Amendment
The original Tenth Schedule contained two exceptions to the disqualification regime — paragraphs 3 (split) and 4 (merger).
Paragraph 3 (now repealed) — split exception. If a faction of at least one-third of the original legislature party split off, the breakaway faction would be deemed a separate political party for the purposes of the Tenth Schedule. The breakaway members would not be disqualified.
This exception became the major loophole of the original law. Politicians orchestrated bulk defections of one-third (or more) of legislature parties to avoid disqualification. The "split" was often orchestrated for ministerships rather than for genuine ideological reasons. The 1997 Uttar Pradesh case (Kalyan Singh government, with 22 Congress and 12 BSP defectors all being made ministers) was a notorious example. The split exception had become an engine of defection rather than a safeguard.
The 91st Amendment of 2003. Recommended by the National Commission to Review the Working of the Constitution, the 91st Amendment did three things:
(i) Paragraph 3 (split exception) was deleted. Bulk defection of one-third no longer protects from disqualification. Every defection is judged individually under paragraph 2.
(ii) Article 164 was amended to add clause (1B). A member disqualified for defection is also disqualified from being appointed as a Minister of the Council of Ministers. This is the "no-reward" provision — defectors cannot be made ministers immediately after defection.
(iii) Article 361B was added. Disqualified members cannot hold any "remunerative political post" until either the end of the legislative term or until re-election to the House — whichever is earlier.
Paragraph 4 — merger exception. Survives. If two-thirds of the members of a legislature party agree to merge with another party, the merging members are not disqualified. This is the "genuine merger" exception, requiring substantial agreement (two-thirds, not one-third). The merger exception is much harder to abuse than the split exception was.
The 91st Amendment thus tightened the regime substantially. After 2003, defection without merger triggers disqualification, and defection-via-merger requires a much higher threshold of party-internal consent.
Who decides — Speaker, Chairman, judicial review
Paragraph 6 of the Tenth Schedule provides that the question whether a member has incurred disqualification under the Schedule shall be decided by:
(a) for the Lok Sabha or a Legislative Assembly — the Speaker;
(b) for the Rajya Sabha or a Legislative Council — the Chairman.
The Speaker / Chairman acts only on a written petition from another member. The Speaker / Chairman cannot suo motu (on their own motion) initiate a disqualification proceeding.
Paragraph 7 of the Tenth Schedule originally barred the courts' jurisdiction. It provided: "Notwithstanding anything in this Constitution, no court shall have any jurisdiction in respect of any matter connected with the disqualification of a member of a House under this Schedule."
The Supreme Court in Kihota Hollohon v. Zachilhu (1992) struck down paragraph 7 as unconstitutional. The Court held that paragraph 7 was an attempt to oust judicial review of constitutional questions, and judicial review is itself a basic feature. The Speaker's decision under the Tenth Schedule is therefore subject to judicial review by the High Court (Article 226) and the Supreme Court (Article 32).
The Court also held that the Speaker, when deciding a Tenth Schedule question, is functioning as a "tribunal" — not as a presiding officer. The decision is judicial in nature, not legislative. This means the decision must be based on evidence, follow the principles of natural justice, and be amenable to judicial review.
However, a recurring problem has been the Speaker's delay in deciding defection cases. The Tenth Schedule does not specify a time-frame; the 2022 Prelims tested this. The Supreme Court in Keisham Meghachandra Singh (2020) recommended a three-month period as a "reasonable" benchmark, but this is judge-made guideline, not constitutional text.
Kihota Hollohon — the foundational case
Kihota Hollohon v. Zachilhu (1992) is the foundational Supreme Court case on the Anti-Defection Law. A 5-judge bench, by 3:2 majority, settled several key questions.
What the majority held. The Tenth Schedule is constitutionally valid. The disqualification regime does not violate freedom of speech of MPs (Article 105) or freedom of expression (Article 19). The Speaker's adjudicatory role is constitutional. But paragraph 7 (ouster of judicial review) is unconstitutional and must be severed; the rest of the Tenth Schedule survives.
What the minority held. The minority would have held the entire Schedule unconstitutional on the ground that vesting adjudicatory power in the Speaker — who depends on majority support of the House — undermines the basic feature of fair adjudication. The minority opinion was prophetic; subsequent practice has shown that Speakers from ruling parties have often delayed or politicised defection decisions.
Subsequent cases have refined the position. Mayawati v. Markendeya Chand (1998) saw the Court split on the merits of a specific Speaker's decision but reaffirmed judicial review. Rajendra Singh Rana v. Swami Prasad Maurya (2007) held that the Speaker cannot decide split or merger questions independently of an actual disqualification petition. Keisham Meghachandra Singh (2020) recommended the three-month time-frame for Speaker decisions.
Effectiveness and ongoing critiques
The Anti-Defection Law has reduced individual defection but not eliminated political instability arising from group defections.
What the law has done. It has made individual defection costly. An MP who switches parties without genuine merger now loses their seat. This has stabilised the parliamentary system — governments are less likely to fall through opportunistic defection of a few MPs.
What the law has not done. The merger exception (paragraph 4) still allows two-thirds of a legislature party to defect by formally "merging" with another party. The 2017 Goa case and the 2019-2020 Madhya Pradesh case were prominent examples — bulk defections engineered through formal merger or through resignation-and-re-election strategies.
The whip problem. The whip mechanism (defection ground 2) has been criticised for over-restricting MPs' independent judgment. An MP who genuinely disagrees with the party line on a matter cannot vote against the whip without risking disqualification. The original purpose of the law was to prevent corrupt defection; the practical effect has been to enforce strict party discipline on every vote, even on matters of conscience.
The Speaker problem. Speakers have often delayed or selectively decided defection cases. The 2020 Karnataka case and the 2023 Maharashtra case were notable examples of Speaker decisions criticised for political bias. The proposal to transfer the adjudicatory function from the Speaker to an independent body (such as the Election Commission) has been recurrent but not enacted.
Reform proposals. The 1999 Law Commission report recommended omission of paragraph 3 (which the 91st Amendment did). The 2002 NCRWC report recommended reforms to the Speaker's adjudicatory role. The 2022 Supreme Court suggestions in Keisham Meghachandra have all pointed in the same direction — taking the decision-making power out of the Speaker's hands. None of these reforms has been enacted.
What students must hold
One subtle point worth holding. Defection grounds operate at the moment of the disqualifying act, not at the moment of the Speaker's decision. If a member voluntarily gives up party membership today, the disqualification arises today — even if the Speaker decides the petition months later. This was clarified by the Supreme Court in Rajendra Singh Rana (2007). The implication is that the Speaker's delay does not save the member from the legal consequences of the act; the member is disqualified from the date of the act, even if the formal Speaker's declaration comes much later.
Six points carry the weight. One, the Anti-Defection Law was enacted by the 52nd Amendment of 1985 and added the Tenth Schedule to the Constitution. The 2014 Prelims tested this — Tenth Schedule is the answer.
Two, grounds for disqualification (paragraph 2): voluntarily giving up party membership; voting/abstaining against the whip without permission and without condonation in 15 days; nominated members joining a party AFTER six months of nomination (the 2022 trap was the inversion); independent members joining any party.
Three, exceptions: paragraph 3 (split — one-third defection) was DELETED by the 91st Amendment of 2003. Paragraph 4 (merger — two-thirds defection) survives.
Four, the 91st Amendment also added Article 164(1B) (defectors cannot be made ministers) and Article 361B (defectors cannot hold remunerative political posts until end of term or re-election).
Five, decision: paragraph 6 — Speaker for Lok Sabha and State Legislative Assembly; Chairman for Rajya Sabha and Legislative Council. Original paragraph 7 (no judicial review) was struck down in Kihota Hollohon (1992). Decisions are subject to judicial review.
Six, the Tenth Schedule does NOT specify a time-frame for the Speaker/Chairman to decide. The 2022 Prelims tested this — the answer was that no time-frame is specified. The Supreme Court in Keisham Meghachandra (2020) recommended three months as a reasonable benchmark. For more, see parliamentary control over the executive.