a) that person is of Indian origin of full age and capacity who is a citizen of a specified country;
b) that a person is of full age and capacity who has obtained the citizenship of a specified countries on or after the commencement of Citizenship (Amendment) Act, 2003 and who was a citizen of India immediately before such commencement;
c) The person registered as an overseas citizens of India shall be an overseas citizen of India as from the date on which he is so registered.
No person who has been deprived of his Indian citizenship under this Act shall be registered as an overseas citizen of India except by an order of the central Government. For this purpose, the expression "person of Indian origin" shall mean a citizen of another country who;
* was eligible to become a citizen of India at the time of the commencement of the Constitution;
* belonged to a territory that became part of India after the 15th day of August, 1947; and
* the children and grand-children of a person covered under clauses (i) and (ii), but does not include a person who is or had been at any time a citizen of Pakistan, Bangladesh or such other country as the Central Government may, by notification in the Official Gazette, specify.