Constitution of India
Section 5
Citizenship at the commencement of the Constitution
Statutory Content
At the commencement of this Constitution, every person who has his domicile in the territory of India and — (a) who was born in the territory of India; or (b) either of whose parents was born in the territory of India; or (c) who has been ordinarily resident in the territory of India for not less than five years immediately preceding such commencement, shall be a citizen of India.