law: Water (Prevention and Control of Pollution) Act, 1974
  48. Offences by Government Departments.
  
  Where an offence under this Act has been
  
  committed by any Department of Government, the Head of the Department shall be
  
  deemed to be guilty of the offence and shall be liable to be proceeded against
  
  and punished accordingly :
  Provided that nothing contained in this section
  
  shall render such Head of the Department liable to any punishment if he proves
  
  that the offence was committed without his knowledge or that he exercised all
  
  due diligence to prevent the commission of such offence.