law: Trade Union Act, 1926 
  17. Criminal conspiracy in trade disputes 
  No 8[office-bearer] or member of a registered trade
  
  union shall be liable to punishment under sub-section (2) of section 120B of
  
  the Indian Penal Code, 1860 (45 of 1860) in respect of any agreement made
  
  between the members for the purpose of furthering any such object of the trade
  
  union as is specified in section 15, unless the agreement is an agreement to
  
  commit an offence.