law: Representation of the People Act, 1950 
  16. Disqualifications for registration in an electoral roll 
  (1) A person shall be
  
  disqualified for registration in an electoral roll if he-
  (a) is not a citizen
  
  of India; or
  (b) is of unsound mind
  
  and stands so declared by a competent court; or
  (c) is for the time being disqualified from voting
  
  under the provisions of any law relating to corrupt 47[***]
  
  practices and other offences in connection with elections.
  (2) The name of any
  
  person who becomes so disqualified after registration shall forthwith be struck
  
  off the electoral roll in which it is included:
   1  [Provided that
  
  the name of any person struck off the electoral roll of a constituency by
  
  reason of a disqualification under clause (c) of sub-section (1) shall
  
  forthwith be re-instated in that roll if such disqualification is, during the
  
  period such roll is in force, removed under any law authorizing such removal.]