In India, the legislation subjects are divided into 3 lists -Union List, State List and Concurrent List . In the normal legislation process, the subjects in Union list can only be legislated upon by central legislative body called Parliament of India, for subjects in state list only respective state legislature can legislate. While for Concurrent subjects, both center and state can make laws. But to implement international treaties, Parliament can legislate on any subject overriding the general division of subject lists.
What is the central legislative body in India?
Parliament of India