The Central Government may, subject to certain restrictions, on an application made in this behalf, register any person, not being an illegal migrant and who is not already a citizen by virtue of the provisions of the Constitution or of any other provision of the Citizenship Act, 1955 as a citizen of India, if he belongs to any of the following categories:
a person of Indian origin who is ordinarily resident in India for seven years before making an application for registration;
a person of Indian origin who is ordinarily resident in any country or place outside undivided India;
a person who is married to a citizen of India and is ordinarily resident in India for seven years before making an application for registration.
minor children of persons who are citizens of India;
a person of full age and capacity whose parents are registered as citizens of India by ordinary residence in India for seven years;
a person of full age and capacity who, or either of his parents, was earlier citizen of independent India, and has been residing in India for one year immediately before making an application for registration;
a person of full age and capacity who has been registered as an overseas citizen of India for five years, and who has been residing in India for one year before making an application for registration.
