Search warrant and seizure proceedings-Obtaining a search warrant was a rule and exercise of unusual power to effect search or arrest without warrant an exception-Conscious application of mind needed on part of officer to effect search or arrest without a warrant as to possibilities of escape or concealment of evidence on part of offender – Provisions of S. 21(2) of control of Narcotics substances Act, 1997 required that before or immediately after taking any action under S. 21(2) of said act, officer concerned must record grounds and the basis of his information and proposed action and forthwith send a copy thereof to his immediate superiors Such safeguard was provided to prevent abuse of extraordinary powers