After this procedure the amendment is signed by the head of the state i.e; the President.
Since in India important amendments can be amended through this procedure Hence, Indian Constitution has been rightly called a rigid constitution. The Union List consists of 97 subjects of national importance such as Defence, Railways, Post and Telegraph, etc.
The question whether the Indian Constitution could be called a federal constitution troubled the minds of the members of the Constituent Assembly.
This question cannot be answered without going into the meaning of federalism and the essential features that are evident in federal state.
It can declare a law as unconstitutional, if it contravenes any provision of the Constitution.
In spite of the fact that the Indian Constitution establishes a federal structure, it is indeed very difficult to put the Indian Constitution in the category of a true federation.
The federation is a union because it is indestructible and helps to maintain the unity of the country.
Art 155 and 156 provide that the Governor, who is the constitutional head of a State, is to be appointed by the President and stays only until the pleasure of the President The Centre may take over the administration of the State on the recommendations of the Governor or otherwise.
A unitary system is governed constitutionally as one single unit, with one constitutionally created legislature. A unitary state is a sovereign state governed as one single unit in which the central government is supreme and any administrative divisions (sub national units) exercise only powers that the central government chooses to delegate.
This is one of the federal features of the Indian constitution.
This enables the Union government to exercise control over the State administration.