Article 7 of Constitution of India "Rights of citizenship of certain migrants to Pakistan"
Notwithstanding anything in Articles 5 and 6, a person who has after the first day of March, 1947,migrated from the territory of India to the territory now included in Pakistan shall not be deemed to be a citizen of India:
Provided that nothing in this Article shall apply to a person who, after having so migrated to the territory now included in Pakistan, has returned to the territory of India under a permit for resettlement or permanent return issued by or under the authority of any law and every such person shall for the purposes of clause (b) of Article 6 be deemed to have migrated to the territory of India after the nineteenth day of July, 1948.
Article 8 of Constitution of India "Rights of
citizenship of certain persons of India origin residing
outside India"
Notwithstanding anything in Article 5, any person who or
either of whose parents or any of whose grand-parents was
born in India as defined in the Government of India Act,
1935 (as originally enacted), and who is ordinarily residing
in any country outside India as so defined shall be deemed
to be a citizen of India if he has been registered as a
citizen of India by the diplomatic or consular
representative of India in the country where he is for the
time being residing on an application made by him therefore
to such diplomatic or consular representative, whether
before or after the commencement of this Constitution, in
the form and manner prescribed by the Government of the
Dominion of India or the Government of India.