law: Constitution of India, 1949 
     6. Rights of citizenship of certain persons
  
  who have migrated to India from Pakistan.- 
  Notwithstanding anything in Article 5, a
  
  person who has migrated to the territory of India from the territory now
  
  included in Pakistan shall be deemed to be a citizen of India at the
  
  commencement of this Constitution if- 
  (a) he or either of his parents or any of his
  
  grand-parents was born in India as defined in the Government of India Act, 1935
  
  (as originally enacted); and
  (b) (i) in the case where such person has so
  
  migrated before the nineteenth day of July, 1948, he has been ordinarily
  
  resident in the territory of India since the date of his migration, or
  (ii) in the case where
  
  such person has so migrated on or after the nineteenth day of July, 1948, he
  
  has been registered as a citizen of India by an officer appointed in that
  
  behalf by the Government of the Dominion of India on an application made by him
  
  therefor to such officer before the commencement of this Constitution in the
  
  form and manner prescribed by that Government:
  Provided  that no person shall be so registered
  
  unless he has been resident in the territory of India or at least six months
  
  immediately preceding the date of his application.