Preventive detention fails where a single assault is only a law and order issue and the authority acts without proper mind.

A preventive detention order was not invalid merely because it omitted the detention period, since the statute did not require the authority to specify it and the scheme separately provided safeguards, review and a maximum detention limit. However, a solitary assault at a public seminar was treated as a law and order matter rather than a public order issue, because there was no material showing wider disruption of community life or public tranquillity. The detention was also undermined by non-application of mind, as the authority relied on the police version despite being present at the seminar. The order was therefore unsustainable and quashed.

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Issues: (i) Whether a detention order under the preventive detention statute is invalid for failure to specify the period of detention. (ii) Whether a solitary incident of assault at a public seminar could be treated as prejudicial to the maintenance of public order, and whether the detention order suffered from non-application of mind.

Issue (i): Whether a detention order under the preventive detention statute is invalid for failure to specify the period of detention.

Analysis: The statutory scheme distinguished between the period of delegation of power to the District Magistrate or Commissioner of Police and the period of detention of the detenu. The provisions governing detention did not require the detaining authority to state the duration of detention in the order. The statute also provided safeguards through reporting, approval, representation, Advisory Board review, and a maximum detention period. Consistent authority had held that, where the Act does not require specification of period, omission to do so does not invalidate the order.

Conclusion: The detention order was not invalid merely because it did not specify the period of detention.

Issue (ii): Whether a solitary incident of assault at a public seminar could be treated as prejudicial to the maintenance of public order, and whether the detention order suffered from non-application of mind.

Analysis: The incident, though serious, was a single occurrence directed against one individual in the course of a public meeting. The distinction between law and order and public order depends on the degree and reach of the disturbance. On the facts, the episode was treated as one affecting law and order rather than public order, because there was no material showing a wider impact on community life or public tranquillity. Further, the detaining authority was present at the seminar yet relied on the police version rather than his own perception, which undermined the bona fides of the subjective satisfaction recorded for detention.

Conclusion: The ground did not justify detention on the basis of public order, and the order was vitiated by non-application of mind.

Final Conclusion: The detention order could not be sustained in law and was quashed.

Ratio Decidendi: A preventive detention order is not invalid merely because it omits the period of detention where the statute does not require such specification, but a solitary act affecting only law and order cannot justify preventive detention on the ground of public order absent material showing wider impact on the community.

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