law: The Motor Vehicles Act, 1988
  186. Driving when 
  
  mentally or phycically unfit to drive.
  Whoever drives a motor 
  
  vehicle in any public place when he is to his knowledge suffering from  any 
  
  disease  or disability  calculated  to  cause  his driving of  the vehicle  to 
  
  be a source of danger to the public, shall be punishable  for the first offence 
  
  with fine which may extend to two hundred rupees  and for a second or subsequent 
  
  offence with fine which may extend to five hundred rupees.