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.
In a federal set up there is a two tier of Government with well assigned powers and functions.
The Concurrent List has 47 subjects important to both the Union and the State such as Electricity, Trade Union, Economic and Social Planning, etc.The supremacy of the constitution means that both, the Union and the State Governments, shall operate within the limits set by the Constitution.And both the union government and the central government derive their powers from the constitution.: The constitution of India is a rigid constitution and this is one of the basic features of federal constitution.The following provision of Indian constitution makes it unitary Article I of the Constitution describes India as a ‘Union of States’, which implies two things: firstly, it is not the result of an agreement among the States and secondly, the States have no freedom to secede or separate from the Union.
Besides, the Constitution of the Union and the States is a single framework from which neither can get out and within which they must function.
This enables the Union government to exercise control over the State administration.