Please answer a question about the following article about Treaty:

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.

In order to implement international treaties, for what subjects can the Parliament of India legislate to override the general division of subject lists?
any subject