Preventive detention and separability under Section 5A upheld where remaining grounds independently supported the detention order.

A preventive detention order under the Tamil Nadu Act was upheld because the materials, including the Forest Officer's report, did indicate ecological destruction amounting to prejudice to public order, and the High Court's contrary factual premise was unsustainable. The Court also applied Section 5A's separability principle, holding that even if one ground was extraneous or irrelevant, the detention remained valid where the remaining grounds were independently sufficient. The earlier precedent relied on was treated as applicable on the same facts and legal setting, so the challenge failed and the detention order was restored.

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Issues: Whether the preventive detention order was vitiated because the materials relied upon did not establish prejudice to public order and because some grounds were said to be extraneous, in the light of the separability rule under Section 5A.

Analysis: The detention was ordered under Section 3(1) of the Tamil Nadu Prevention of Dangerous Activities of Bootleggers, Drug Offenders, Goondas, Immoral Traffic Offenders and Slum Grabbers Act, 1982. The impugned reasoning of the High Court was found unsustainable because the Forest Officer's report did refer to ecological destruction in terms showing prejudice to public order, and the factual premise that there was no such indication was incorrect. The Court also held that even if one ground was treated as extraneous or irrelevant, Section 5A preserves the detention order where the remaining grounds are sufficient, since the grounds are severable. The earlier decision relied upon was held to apply on the same facts and legal setting.

Conclusion: The detention order was held to be valid and the High Court's quashing of it was set aside.

Final Conclusion: The preventive detention challenge failed, and the detention order was restored with the appeals succeeding.

Ratio Decidendi: Under the preventive detention statute, a detention order is not invalidated merely because one ground is alleged to be extraneous or irrelevant, if the remaining grounds are independently sufficient and the statute applies the separability principle through Section 5A.

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