It has been the matter of debate among the scholars that whether the constitution of India is completely federal or unitary in nature.
But actually Indian constitution contains both features of a federal constitution and unitary constitution.
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.
What feature of Indian constitution makes it federal or what features makes it unitary.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 procedure of amending the Constitution in a federal system is normally rigid.Indian Constitution provides that some amendments require a special majority.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.As such amendments can only be made by the Union Parliament.All India Services such as IAS and IPS have been created which are kept under the control of the Union.In Indian constitution the powers of state and centre are clearly defined and there are very clear limits of both the centre and the state for law making powers. The State List consists of 66 subjects of local interest such as Public Health, Police etc.The Concurrent List has 47 subjects important to both the Union and the State such as Electricity, Trade Union, Economic and Social Planning, etc.