Constitutional invalidity of migrant deportation law for frustrating detection of illegal migrants and failing rational classification test.

A special migrant-detention and deportation regime was held unconstitutional because its procedure made detection and expulsion of illegal migrants unduly onerous, shifted no meaningful burden onto the claimed citizen, and in practice frustrated the Union's constitutional duty to protect the State from external aggression and internal disturbance. The Court also found that applying the regime only to Assam failed Article 14, because the geographical classification lacked a rational nexus with the object of effective detection and removal of illegal migrants and instead conferred an undue advantage on such migrants. The impugned Act and Rules were invalidated, and the general framework under the Foreigners Act, 1946 and connected laws was restored.

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Issues: (i) Whether the Illegal Migrants (Determination by Tribunals) Act, 1983 and the Illegal Migrants (Determination by Tribunals) Rules, 1984 were unconstitutional for defeating the Union's duty under Article 355 of the Constitution of India to protect the State against external aggression and internal disturbance; (ii) Whether the application of the Act only to Assam offended Article 14 of the Constitution of India for want of rational nexus with the object of the legislation.

Issue (i): Whether the Illegal Migrants (Determination by Tribunals) Act, 1983 and the Illegal Migrants (Determination by Tribunals) Rules, 1984 were unconstitutional for defeating the Union's duty under Article 355 of the Constitution of India to protect the State against external aggression and internal disturbance.

Analysis: The Act and Rules were found to create an excessively onerous and one-sided procedure for detecting and expelling illegal migrants. Unlike the Foreigners Act, 1946, they did not place the burden of proof on the person claiming to be a citizen, imposed restrictive procedural hurdles at the threshold, and resulted in a negligible rate of successful detection and expulsion despite large-scale illegal migration. On the material placed before the Court, this regime was held to obstruct effective action against illegal immigration and to negate the constitutional obligation of the Union to protect Assam from external aggression and internal disturbance.

Conclusion: The Act and the Rules were held to be ultra vires the Constitution and struck down.

Issue (ii): Whether the application of the Act only to Assam offended Article 14 of the Constitution of India for want of rational nexus with the object of the legislation.

Analysis: A geographical classification may be valid only if it is based on intelligible differentia and bears a rational nexus to the object sought to be achieved. Although Assam presented a distinct factual situation, the legislation was held to fail this test because the statutory scheme, instead of facilitating detection and deportation of illegal migrants, practically defeated that object. The special regime conferred an undue advantage on illegal migrants in Assam and lacked a rational connection with the stated purpose of the enactment.

Conclusion: The classification was held to be discriminatory and violative of Article 14.

Final Conclusion: The challenge succeeded in full, the impugned Act and Rules were invalidated, and the legal regime for detection and deportation of foreigners in Assam was directed to revert to the general framework under the Foreigners Act, 1946 and the connected laws.

Ratio Decidendi: A special statute governing citizenship or deportation will fail constitutional scrutiny if its procedure frustrates the very object of detection and removal of illegal migrants, and a geographical classification is invalid where it lacks a rational nexus with that object.

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