 The powers conferred upon a police officer to arrest and detain persons pending enquiries, to arrest persons against whom detention orders have been made, and to enter and search premises may be exercised by an officer of the Central Narcotics Bureau.After a detention order has been made or after its expiry, the Minister may direct that the person be subject to police supervision for a period not exceeding three years.The making of a police supervision order cancels any detention order in force.