Illegal Immigration

Internal Security
Constitution VerifiedUPSC Verified
Version 1Updated 5 Mar 2026

Article 355 of the Indian Constitution states: 'It shall be the duty of the Union to protect every State against external aggression and internal disturbance and to ensure that the government of every State is carried on in accordance with the provisions of this Constitution.' The Citizenship Act, 1955, Section 9 provides: 'The Central Government may, by order, deprive any citizen of India of his …

Quick Summary

Illegal immigration into India involves unauthorized entry, stay, or residence of foreign nationals without proper documentation, primarily from Bangladesh and Myanmar. The 4,096-kilometer India-Bangladesh border serves as the main corridor, passing through West Bengal, Assam, Meghalaya, Tripura, and Mizoram.

Key legal frameworks include the Citizenship Act 1955, Foreigners Act 1946, and constitutional Article 355 mandating Union protection of states. The issue gained prominence during the Assam Agitation (1979-1985), leading to the Assam Accord establishing March 24, 1971, as the cut-off date for detecting illegal immigrants.

Security challenges include demographic changes, resource strain, border vulnerabilities, and potential terrorism links. Detection mechanisms involve BSF surveillance, police investigations, and Foreigners Tribunals, while deportation faces challenges due to Bangladesh's non-cooperation and documentation issues.

The National Register of Citizens (NRC) in Assam excluded 1.9 million people, though exclusion doesn't automatically indicate illegal status. The Citizenship Amendment Act 2019 provides citizenship pathways for persecuted minorities from Pakistan, Afghanistan, and Bangladesh, excluding Muslims and generating constitutional challenges.

Border management includes 3,141 km of fencing, technological surveillance systems, and bilateral cooperation mechanisms. Push factors include economic hardship, natural disasters, and political instability in origin countries, while pull factors involve better opportunities, wage differentials, and established migrant networks in India.

The Free Movement Regime with Myanmar allows 16 km cross-border travel without visas, complicating immigration control. Recent developments focus on technology integration, detention center reviews, and climate-induced migration recognition.

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  • India-Bangladesh border: 4,096 km, 5 states (WB, Assam, Meghalaya, Tripura, Mizoram)
  • Key laws: Citizenship Act 1955, Foreigners Act 1946, CAA 2019
  • Constitutional basis: Article 355 (Union's duty to protect states)
  • Assam cut-off date: March 24, 1971 (Assam Accord 1985)
  • NRC Assam: 1.9 million excluded (2019)
  • CAA: citizenship for 6 minorities from Pak, Afghan, Bangladesh (excludes Muslims)
  • FMR with Myanmar: 16 km visa-free travel
  • Border fencing: 3,141 km completed
  • Key case: Sarbananda Sonowal v. UOI (2005) - struck down IMDT Act
  • Main challenges: deportation difficulties, documentation, bilateral cooperation

Vyyuha Quick Recall - BORDER Mnemonic: B - Bangladesh border 4,096 km, 5 states; O - One cut-off date: March 24, 1971 (Assam); R - Refugees vs illegal immigrants distinction; D - Deportation challenges, documentation issues; E - Exclusion from NRC ≠ illegal immigrant; R - Rights vs security balance, Article 355 + Article 14.

Memory Palace: Visualize the India-Bangladesh border as a long fence (4,096 km) with five gates (states), guarded by BSF personnel checking documents dated March 24, 1971, while Supreme Court judges in robes observe the CAA implementation excluding certain communities, with detention centers visible in the background and climate refugees approaching from flood-affected areas.

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