law: Constitution of India, 1949 
     16. Equality of opportunity in matters of public
  
  employment.- 
  (1) There shall be equality of opportunity for
  
  all citizens in matters relating to employment or appointment to any office
  
  under the State.
  (2) No citizen shall, on grounds only of
  
  religion, race, caste, sex, descent, place of birth, residence or any of them,
  
  be ineligible for, or discriminated against in respect or, any employment or
  
  office under the State.
  (3) Nothing in this article shall prevent
  
  Parliament from making any law prescribing, in regard to a class or classes of
  
  employment or appointment to an office under the Government of, or any local or
  
  other authority within, a State or Union territory, any requirement as to
  
  residence within that State or Union territory] prior to such employment or
  
  appointment.
  (4) Nothing in this article shall prevent the
  
  State from making any provision for the reservation of appointments or posts in
  
  favor of any backward class of citizens which, in the opinion of the State, is
  
  not adequately represented in the services under the State.
  (5) Nothing in this article shall affect the
  
  operation of any law which provides that the incumbent of an office in
  
  connection with the affairs of any religious or denominational institution or
  
  any member of the governing body thereof shall be a person professing a
  
  particular religion or belonging to a particular denomination.