Unlawful Activities (Prevention) Act, 1967 ; Section 43 D(2)(b) – The extension for investigation could be granted up to a maximum period of 180 days for the following reasons: Completion of the investigation; Progress in the investigation was explained; and Specific reasons for detention beyond a period of 90 days – In this case, the Public Prosecutor had mentioned in the request that major investigation of the case had been completed and the draft chargesheet had been prepared. However, for want of remaining sanctions and FSL report some more time was required for completing the investigation – The High Court also fell in error in not taking into consideration the reasons given under section 43D(2) (b) were clearly made out. (Para 10)