law: Industrial Disputes Act, 1947
  21. Certain matters to be kept
  
  confidential
  There shall not be included in any report or award under this
  
  Act, any information obtained by a Conciliation Officer, Board, court, 117[Labor
  
  Court, Tribunal, National Tribunal or an arbitrator], in the course of any
  
  investigation or inquiry as to a trade union or as to any individual business
  
  (whether carried on by a person, firm or company) which is not available
  
  otherwise than through the evidence given before such officer, Board, court, 117[
  
  Labor Court, Tribunal, National Tribunal or arbitrator], if the trade union,
  
  person, firm or company, in question has made a request in writing to
  
  the conciliation officer, Board, court 117[Labor Court, Tribunal
  
  ,National Tribunal or arbitrator], as the case may be, that such information
  
  shall be treated as confidential; nor shall such conciliation officer or any
  
  individual member of the Board, 121[or court or the presiding
  
  officer of the Labor Court, Tribunal or National Tribunal or the arbitrator] or
  
  any person present at or concerned in the proceedings disclose any such
  
  information without the consent in writing of the secretary of the trade union
  
  or the person, firm or company in question, as the case may be:
  PROVIDED  that nothing contained in this section shall
  
  apply to a disclosure of any such information for the purposes of a prosecution
  
  under section 193 of the Indian Penal Code (45 of 1860).