Preventive detention challenges fail where omitted documents are non-prejudicial and delay is explained without breaking the live link.

Non-consideration of a document invalidates preventive detention only if the document was truly relevant and its omission caused prejudice. The bail order here contained only routine conditions, and the show cause notice merely repeated material already in the sponsoring file, so their non-consideration did not vitiate the detention order. The Advisory Board did not act illegally in receiving the show cause notice, and no substantiated request to adduce evidence was shown to have been refused, so no procedural prejudice was established. Delay in passing and executing the detention order was explained by scrutiny of a voluminous proposal and by efforts to trace the detenu, so the live link was not broken and the detention was not rendered illegal.

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Issues: (i) Whether non-consideration of the bail order and the show cause notice before the detaining authority vitiated the detention order; (ii) whether the Advisory Board acted illegally in receiving and considering the show cause notice and in relation to the detenu's request to adduce evidence; (iii) whether delay in passing and executing the detention order snapped the live link and rendered the detention illegal.

Issue (i): Whether non-consideration of the bail order and the show cause notice before the detaining authority vitiated the detention order.

Analysis: A preventive detention order must rest on relevant material considered with due application of mind, and omission of a vital document can invalidate the order if prejudice is shown. The bail order relied on by the detenu contained only routine conditions to appear before the investigating officer and not to tamper with evidence; it did not restrain further prejudicial conduct or indicate consequences for breach. The show cause notice merely reflected the material already available in the sponsoring file and did not disclose any fresh or additional facts. Since neither document was shown to have affected the decision-making process, their non-consideration did not establish prejudice.

Conclusion: The detention order was not vitiated on this ground.

Issue (ii): Whether the Advisory Board acted illegally in receiving and considering the show cause notice and in relation to the detenu's request to adduce evidence.

Analysis: The Advisory Board is empowered under the governing provision to consider the reference, the materials placed before it, and any further information it deems necessary, and to hear the detenu if required. The show cause notice was served on the detenu and his advocate, and there was no substantiated pleading that any request for time or for oral evidence was made and refused. In the absence of a demonstrated procedural prejudice, the mere production of the notice before the Board did not amount to illegality.

Conclusion: No illegality in the Advisory Board's procedure was established.

Issue (iii): Whether delay in passing and executing the detention order snapped the live link and rendered the detention illegal.

Analysis: Delay in preventive detention can be fatal only when it is inordinate and unexplained so as to break the live nexus between the prejudicial activity and the need for detention. Here, the record disclosed multiple stages of scrutiny of a voluminous proposal before the order was issued, which explained the time taken in passing the order. The delay in execution was also explained by the detenu's concealment from arrest and the repeated efforts made by the police to locate him. In these circumstances, the delay was not held to be unexplained or fatal.

Conclusion: The delay did not vitiate the detention order.

Final Conclusion: The challenge to the preventive detention failed on all substantive grounds, and the detention was upheld.

Ratio Decidendi: In preventive detention matters, only non-consideration of a truly relevant and prejudicially material document, or inordinate unexplained delay breaking the live link, can invalidate the order; routine or narrative documents that add no new material and duly explained delays do not do so.

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