The doctrine of Separation of Powers divides governmental authority among three organs — Legislature, Executive, and Judiciary — so that no single organ accumulates unchecked power. Rooted in Montesquieu’s political philosophy, the doctrine aims at ensuring that justice does not become arbitrary and that individual liberty remains protected.

India’s Unique Model

India follows neither the rigid model of the USA (where powers are expressly vested in three separate organs under Articles I, II, and III) nor the loose Westminster model of the UK (where parliamentary supremacy prevails). Instead, India follows a third model — a broad separation with functional overlap and a strong system of checks and balances.

The Constitution does not explicitly use the phrase “separation of powers,” but it distributes functions across the three organs. The Legislature frames laws, the Executive implements them, and the Judiciary monitors constitutionality and resolves disputes. Article 50 specifically directs the State to separate the Judiciary from the Executive to ensure judicial independence.

In Kesavananda Bharati v. State of Kerala (1973), the Supreme Court declared that separation of powers is part of the basic structure of the Constitution — meaning Parliament itself cannot abrogate it.

Functional Overlap

In practice, the three organs operate with considerable overlap:

  • The Judiciary exercises quasi-legislative functions through judicial review, PIL, and landmark directives such as the Vishaka Guidelines on workplace harassment
  • The Legislature exercises judicial functions during impeachment of the President and removal of judges
  • The Executive promulgates ordinances (Articles 123 and 213), exercises delegated legislative power, and performs quasi-judicial functions through tribunals

As the Supreme Court observed in Indira Nehru Gandhi v. Raj Narain (1975): “in the Indian Constitution, there is separation of powers in a broad sense only.”

Checks and Balances

Each organ checks the others:

  • The Legislature scrutinises the Executive through question hour, budget approval, and no-confidence motions; it can impeach judges and pass constitutional amendments to override judicial decisions
  • The Judiciary can strike down laws through judicial review and declare executive actions unconstitutional
  • The Executive appoints judges, enjoys veto power over bills, and can summon or dissolve the Legislature

Where the Doctrine is Being Undermined

Several practices have weakened the doctrine in practice — placing laws under the Ninth Schedule to shield them from judicial review, excessive ordinance promulgation (criticised in DC Wadhwa v. State of Bihar, 1986), judicial intervention in executive domains such as banning liquor sale near highways, and tribunals dominated by executive-appointed members who lack security of tenure.

Conclusion

India’s model of separation of powers is not about rigid walls between organs — it is about mutual restraint and cooperative governance. A broad separation with functional overlap and adequate checks and balances is what makes democracy accountable and effective. As Montesquieu intended, the goal remains: government by law, not by the will and whim of individuals.