law: The Foreigners Act, 1946
  16. Application of other
  
  laws not barred. -
  The provisions of this Act shall be in addition 
  
  to, and not in derogation of, the provisions of the Registration of Foreigners 
  
  Act, 1939 (16 of 1939) the Indian Passport Act, 1920 (34 of 1920) and of any 
  
  other enactment for the time being in force.