The Legislative Relation between the Centre and the States: Regarding legislative relation, there is a three fold division of power in the Constitution. Union List, State List and Concurrent List. Union List consists of 97 subjects of national interest. State List consists of 66 subjects of local interest. The concurrent List constits of 47 subjects of common interest. The Parliament has the exclusive powers to enact laws on the subjects of Union List. The State legislatures have been empowered to make laws on the subjects included in State List. Both the Union and the States can make laws on the subjects of Concurrent List. But in case of a conflict between the Union and the State, the Union law prevails over the State law.
Under certain circumstances the Parliament can legislate on the subjects mentioned in the State List. These are:
(i) If there is a proclamation of emergency.
(ii) If the Rajya Sabha passes a resolution by two thirds majority to the effect that an particular subject in the State List is of national importance.
(iii) When a state is under President's Rule.
(iv) When two or more states make a joint request to the Parliament to legislate on a state subject.
(v) In order to implement any international treaty or agreement.
Another important point of legislative relations is that the residuary powers have been vested with the union.