In a true federation such as that of United State of America every State irrespective of their size in terms of area or population it sends two representatives in the upper House i.e. In addition to all this, all important appointments such as the Chief Election Commissioner, the Comptroller and Auditor General are made by the Union Government. There is no provision for separate Constitutions for the states.The States cannot propose amendments to, the Constitution.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.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 Concurrent List has 47 subjects important to both the Union and the State such as Electricity, Trade Union, Economic and Social Planning, etc.
Such an amendment has to be passed by majority of total members of each house of the Parliament as well as by two-thirds majority of the members present and voting there in.
However, in addition to this process, some amendments must be approved by at least 50% of the states.
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.