law: The Foreigners Act, 1946
  8. Determination of 
  
  nationality. -
  (1) When a foreigner is recognized as a
  
  national by the law of more than one foreign country or where for any reason it
  
  is uncertain what nationality, if any, is to be ascribed to a foreigner, that
  
  foreigner may be treated as the national of the country with which he appears
  
  to the prescribed authority to be most closely connected for the time being in
  
  interest or sympathy or if he is of uncertain nationally, of the country with
  
  which he was last so connected:
  Provided that where a foreigner acquired a
  
  nationality by birth, he shall, except where the Central Government so directs
  
  either generally or in a particular case, be deemed to retain that nationality
  
  unless he proves to the satisfaction of the said authority that he has
  
  subsequently acquired by naturalization or otherwise some other nationality and
  
  still recognized as entitled to protection by the Government of the country
  
  whose nationality he has so acquired.
  (2) A decision as to nationality given under
  
  sub-section (1) shall be final and shall not be called in question in any
  
  Court:
  Provided that the Central Government, either of
  
  its own motion or on an application by the foreigner concerned, may revise any
  
  such decision.
  Comment
  A married woman acquires the domicile of her
  
  husband on marriage and capable of acquiring a new domicile by re-marriage
  
  after divorce. (State of Bihar v. Amar Singh, 
  
  AIR 1955 S.C. 282).