Rajya Sabha Defections and Tenth Schedule: Constitutional Debate Explained

On 24 April 2026, seven out of ten Aam Aadmi Party (AAP) Members of Parliament in the Rajya Sabha announced their decision to merge with the Bharatiya Janata Party (BJP), claiming protection under the merger provision of the Tenth Schedule of the Constitution. This development has triggered a major constitutional debate regarding the interpretation of the anti-defection law and the relationship between elected representatives and their political parties.

The controversy goes beyond immediate political consequences and raises fundamental questions about constitutional morality, party discipline, legislative autonomy, democratic accountability, and the role of the Opposition in a parliamentary democracy.

Evolution of the Anti-Defection Law

When the Constitution was originally enacted, it provided only limited grounds for the disqualification of Members of Parliament under Article 103. However, frequent incidents of political defections during the 1960s and 1970s led to instability in governments and weakened public trust in democratic institutions.

To address this growing problem, Parliament enacted the 52nd Constitutional Amendment Act, 1985, which inserted the Tenth Schedule into the Constitution. The objective of the anti-defection law was to prevent political opportunism and ensure stability in parliamentary democracy by disqualifying legislators who abandoned the political parties under whose banner they were elected.

The Split Doctrine and Merger Exception

The original anti-defection framework contained two important exceptions.

Split Doctrine

Under Paragraph 3 of the Tenth Schedule, one-third of the members of a legislature party could form a separate faction without attracting disqualification. This provision was intended to accommodate genuine political differences within parties.

However, over time, the split provision became a tool for engineered defections and political manipulation. Legislators frequently exploited this loophole to evade disqualification while changing political allegiance.

Merger Exception

Under Paragraph 4, legislators could avoid disqualification if their political party merged with another political party and at least two-thirds of the members of the legislature party supported the merger.

Unlike the split provision, the merger exception was designed to recognize legitimate political realignments rather than opportunistic defections.

Recognizing the misuse of the split doctrine, Parliament enacted the 91st Constitutional Amendment Act, 2003, which abolished Paragraph 3. This reform was based on the recommendations of the Dinesh Goswami Committee and the 170th Report of the Law Commission of India.

The removal of the split provision strengthened the principle that legislators derive their legitimacy primarily from their political parties.

Importance of Political Parties in Parliamentary Democracy

Political parties occupy a central position in India's parliamentary system. Candidates contest elections using a party’s ideology, leadership, organisational structure, electoral symbol, and manifesto.

Therefore, the democratic legitimacy of elected representatives is closely linked to the political party that secured the voters' mandate.

The abolition of the split doctrine reinforced this constitutional principle. It made clear that legislators cannot claim an independent mandate merely because they command numerical strength within a legislature party.

The Constitution thus places significant importance on preserving the integrity and continuity of political parties as democratic institutions.

Supreme Court’s Interpretation

The importance of political parties was reaffirmed by the Supreme Court in Subhash Desai v. Principal Secretary, Governor of Maharashtra (2023).

While deciding the dispute arising from the split in the Shiv Sena led by Eknath Shinde, the Court held that a legislature party cannot function independently of its parent political party. The judgment emphasized that elected representatives remain linked to the political organisation under whose banner they were elected.

The Court clearly stated that the relationship between legislators and their political party cannot be severed merely because legislators command a majority within the legislature wing.

This judgment has become particularly relevant in the present AAP controversy because it supports the constitutional primacy of the original political party over legislative factions.

The Constitutional Question: Interpreting the Merger Exception

The central issue in the present case concerns the interpretation of Paragraph 4 of the Tenth Schedule.

A plain reading of the provision indicates that the merger must first occur at the level of the original political party. The Constitution specifically refers to the merger of the political party itself, not merely the legislature party.

The support of two-thirds of legislators appears to be a secondary requirement that validates and recognizes a legitimate party merger.

If legislators alone are allowed to decide that a merger has taken place without any corresponding decision by the political party, then the legislature party would effectively become superior to the political organisation.

Such an interpretation would undermine the very purpose behind abolishing the split doctrine and weaken the constitutional status of political parties.

In essence, allowing legislators to create a merger independently could reintroduce the same problems that Parliament sought to eliminate through the 91st Constitutional Amendment.

Judicial Clarification and the Way Forward

Given the constitutional ambiguity surrounding the merger exception, judicial intervention appears inevitable.

The Aam Aadmi Party has already approached the Chairman of the Rajya Sabha under Paragraph 6 of the Tenth Schedule, challenging the validity of the merger claim. Regardless of the Chairman’s decision, the matter is likely to reach the Supreme Court of India for authoritative interpretation.

The Court’s ruling will have significant implications for India's parliamentary democracy.

If the Court upholds the claim that a two-thirds majority of legislators can independently effect a merger, it may weaken political parties and encourage future defections under the guise of mergers.

On the other hand, if the Court emphasizes the primacy of the original political party, it will strengthen constitutional morality, party discipline, democratic accountability, and the integrity of electoral mandates.

Conclusion

The anti-defection law was enacted to preserve political stability and prevent opportunistic defections that undermine democratic governance. Through the 91st Constitutional Amendment, Parliament clearly signalled its intention to protect the central role of political parties in India's parliamentary system.

The ongoing Rajya Sabha controversy is therefore not merely a political dispute but a constitutional test of how the merger exception under the Tenth Schedule should be interpreted. The eventual judicial determination will shape the future relationship between legislators and political parties and influence the balance between legislative autonomy and party discipline.

Ultimately, the issue concerns the preservation of parliamentary democracy, constitutional morality, the integrity of the Opposition, and the principle that elected representatives remain accountable to the political parties under whose banner they seek and obtain the people's mandate