12. At the date of the commencement of the Constitution:
(A) Every person domiciled in the territories subject to the jurisdiction of the Republic
(a) who has been ordinarily resident in those territories for not less than five years immediately preceding that date; or
(b) who, or whose parents, or either of whose parents, was or were born in India; shall be a citizen of the Republic, unless he
(i) is a citizen of another state; or
(ii) has migrated to a territory outside the jurisdiction of the Republic.
(B) Every person
(a) who is excluded from citizenship under sub-section A (i) , or A (ii) ; or
(b) who, or whose parents, or either of whose parents, was or were born in the Peninsula of India, and who was domiciled in a territory outside the jurisdiction of the Republic but migrated to a territory within the jurisdiction of the Republic for permanent residence before the commencement of the Constitution shall acquire the citizenship of the Republic, provided that he, or in case he is a minor his guardian on his behalf, intimates to the Federal Government, in the manner prescribed by law, that he wishes to be a citizen of the Republic and to reside permanently in a territory within the jurisdiction of the Republic.
(C) Every person who or whose ancestors was or were born in India and who is domiciled outside the Peninsula of India and has not acquired the citizenship of another state shall be a citizen of the Republic.