What are the cases where the executive power of the Union can extend to giving directions to a State?
The executive power of the Union can extend to giving directions to a State in the following cases:

1. To ensure compliance with the laws made by Parliament and any existing laws which apply in that State.
2. To prevent the exercise of the executive power of a State from impeding or prejudicing the exercise of the executive power of the Union.
3. To direct a State on the construction and maintenance of means of communication declared to be of national or military importance.
4. With respect to highways or waterways declared by Parliament to be national highways or national waterways.
5. To construct and maintain means of communication as part of its functions with respect to naval, military, and air force works.
6. To direct a State on the measures to be taken for the protection of railways within the State.