that in the allied article — Article 15 — the word “residence” is omitted from the opening clause prohibiting discrimination on specified grounds. Clauses (3) and (4) of Article 16 dilute the rigour of clause (2) by (i) conferring an enabling power on Parliament to make a law prescribing the residential requirement within the State in regard to a class or classes of employment or appointment to an office under the State, and (ii) by enabling the State to make a provision for the reservation of appointments or posts in favour of any backward class of citizens which is not adequately represented in the services under the State. The newly introduced clauses (4-A) and (4-B), apart from clause (5) of Article 16 are the other provisions by which the embargo laid down in Article 16(2) in somewhat absolute terms is lifted to meet certain specific situations with a view to promote the overall objective underlying the article. Here, we should make note of two things : firstly, discrimination only on the ground of residence (or place of birth) insofar as public employment is concerned, is prohibited; secondly, Parliament is empowered to make the law prescribing residential requirement within a State or Union Territory, as the case may be, in relation to a class or classes of employment. That means, in the absence of parliamentary law, even the prescription of requirement as to residence
