The Indian Constitution is primarily federal, having features essential for a federal system. In a unitary state there is only one government, namely the national government, in a federal state there are two governments the national or federal government and the government of each component unit. India as a federal system has a Central Government and State Governments.
A division of authority exists between the federal government and the States, there are three lists enumerating the powers of Union, State and Concurrent. A federal state derives its existence from the Constitution. Every power- Executive, Legislative, or Judicial whether it belongs tothe federation or to the component units is subordinate to and controlled by the Constitution. The Indian Constitution is a written document which defines the structure, organization and powers of the Central as well as State governments, and clearly prescribes the limits within which each wing functions.
The constitution of India provides a bicameral legislature at the Centre. The Rajya Sabha gives representation to the States. Parts of the Indian Constitution