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Law Forum India

Law Forum India

Constitutional Law of India - Study Notes

Comprehensive study notes covering the Constitution of India including Fundamental Rights, Directive Principles, Union & State Government, Judiciary, Emergency Provisions, Amendment Procedure, and landmark Supreme Court decisions. Designed as a revision aid for LLB students.

Last updated: 28 February 2026
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Introduction & The Preamble

Disclaimer: These notes are original educational summaries and not a substitute for prescribed textbooks or the bare text of the Constitution.

Historical Background

The Constitution of India was adopted by the Constituent Assembly on 26 November 1949 and came into force on 26 January 1950. The Constituent Assembly, chaired by Dr. Rajendra Prasad with Dr. B.R. Ambedkar heading the Drafting Committee, drew inspiration from several constitutions worldwide while crafting a document suited to India's unique social, cultural, and political realities. The Assembly held its first session on 9 December 1946 and worked for nearly three years, debating each provision in great detail across eleven sessions.

Nature of the Constitution

India's Constitution is the longest written constitution in the world. It originally contained 395 Articles arranged in 22 Parts and 8 Schedules. Over the decades, numerous amendments have expanded its scope. The Constitution establishes India as a Sovereign, Socialist, Secular, Democratic Republic. The words "Socialist" and "Secular" were added by the 42nd Amendment in 1976. The Constitution is neither purely federal nor purely unitary; it is often described as "quasi-federal" or as having a federal structure with a strong unitary bias.

The Preamble

The Preamble serves as the introduction and guiding light of the Constitution. It declares:

  • Sovereign: India is free from external control and has supreme authority over its territory.
  • Socialist: The state aims to reduce inequalities in income, status, and opportunities, and to ensure a fair distribution of resources.
  • Secular: The state treats all religions equally; there is no official state religion, and every person has the right to profess, practice, and propagate any religion.
  • Democratic: The government derives its authority from the will of the people, expressed through free and fair elections based on universal adult suffrage.
  • Republic: The head of state (the President) is elected, not hereditary.

The Preamble further secures to all citizens Justice (social, economic, and political), Liberty (of thought, expression, belief, faith, and worship), Equality (of status and opportunity), and Fraternity (assuring the dignity of the individual and the unity and integrity of the Nation).

Legal Status of the Preamble

In Berubari Union Case (1960), the Supreme Court held that the Preamble is not an operative part of the Constitution. However, in Kesavananda Bharati v. State of Kerala (1973), the 13-judge bench overruled this position and held that the Preamble is a part of the Constitution and can be used as an aid to interpretation of ambiguous provisions. The Court further held that the Preamble reflects the "basic structure" of the Constitution, which cannot be altered even by a constitutional amendment. In S.R. Bommai v. Union of India (1994), the Court reaffirmed that secularism, being part of the Preamble and the basic structure, cannot be destroyed.

Key Features of the Constitution

  • Written and detailed Constitution
  • Parliamentary form of government at both Centre and State levels
  • Blend of rigidity and flexibility in the amendment process
  • Independent judiciary with the power of judicial review
  • Single citizenship
  • Integrated and independent judiciary
  • Universal adult suffrage
  • Fundamental Rights alongside Directive Principles of State Policy