law: Narcotic Drugs and Psychotropic Substances Act, 1985
  41. Power to issue warrant and
  
  authorization.
  (1) A Metropolitan Magistrate or a Magistrate of the first class
  
  or any Magistrate of the second class specially empowered by the State Government
  
  in this behalf, may issue a warrant for the arrest of any person whom he has
  
  reason to believe to have committed any offence punishable under Chapter IV, or
  
  for the search, whether by day or by night, of any building, conveyance or
  
  place in which he has reason to believe any narcotic drug or psychotropic
  
  substance in respect of which an offence punishable under Chapter IV has been
  
  committed or any document or other article which  may
  
  furnish evidence of the commission of such offence is kept or concealed.
  (2) Any such officer of gazetted rank of the departments of
  
  central excise, narcotics, customs, revenue intelligence or any other
  
  department of the Central Government or of the Border Security Force as is
  
  empowered in this behalf by general or special order by the Central Government,
  
  or any such officer of the revenue, drugs control, excise, police or any other
  
  department of a State Government as is empowered in this behalf by general or
  
  special order of the State Government, if he has reason to believe from
  
  personal knowledge or information given by any person and taken in writing that
  
  any person has committed an offence punishable under Chapter IV or that any
  
  narcotic drug, or psychotropic substance in respect of which any offence
  
  punishable under Chapter IV has been committed or any document or other article
  
  which may furnish evidence of the commission of such offence has been kept or
  
  concealed in any building, conveyance or place, may authorize any officer
  
  subordinate to him but superior in rank to a peon, sepoy, or a constable, to
  
  arrest such a person or search a building, conveyance or place whether by day
  
  or by night or himself arrest a person or search a building, conveyance or
  
  place.
  (3) The officer to whom a warrant under sub-section (1) is
  
  addressed and the officer who authorized the arrest or search or the officer
  
  who is so authorized under sub-section (2) shall have all the powers of an
  
  officer acting under section 42.