"Centre-State relations" of Indian Federalism constitute the core of federalism and they are regulated by the provisions of the Constitution.
(i) The division of powers between the Union and the States, as given in the Indian Constitution has a strong bias in favour of the Centre. Various kinds of restrictions are imposed upon the states.
(ii) Administrative relations. The Indian Constitution is based on the principle that the executive power is co-extensive with the Legislative power i.e., Union and state executives can deal with all matters on which legislature legislates.
(iii) In the administrative affairs also the centre acquires control over states through All India Services, Grant-in-Aid etc.
Hence, restructuring of the centre-state relations is one more way in which federalism has been strengthened in practice.