law: Bankers Book Evidence Act, 1891
  5. Case in which officer of bank not
  
  comparable to produce books -
  No officer of a bank shall in any legal
  
  proceeding to which the bank is not a party be comparable to produce any
  
  baker's book the contents of which can be proved under this Act, or to appear
  
  as a witness to prove the matters, transactions and accounts therein recorded,
  
  unless by order of the Court or a Judge made for special cause.