law: Citizenship Act, 1955 
  6. Citizenship by naturalization 
  (1) Where an application is made in the prescribed manner by any
  
  person of full age and capacity who is not a citizen of a country specified in
  
  Schedule I for the grant of a certificate of naturalization to him, the Central
  
  Government may, if satisfied that the applicant is qualified for naturalization
  
  under the provisions of Schedule III, grant to him, a certificate of
  
  naturalization:
  PROVIDED  that, if in the opinion of the Central
  
  Government, the applicant is a person who has rendered distinguished service to
  
  the cause of science, philosophy, art, literature, world peace or human
  
  progress generally, it may waive all or any of the conditions specified in
  
  Third Schedule III.
  (2) The person to whom a certificate of naturalization is
  
  granted under sub-section (1) shall, on taking the oath of allegiance in the
  
  form specified in Schedule II, be a citizen of India by naturalization as from
  
  the date on which that certificate is granted.