Explanation:

During a national emergency, the Parliament becomes empowered to make laws on any subject mentioned in the State List. Although the legislative power of a state legislature is not suspended, it becomes subject to the overriding power of the Parliament. Thus, the normal distribution of the legislative powers between the Centre and states is suspended, though the state Legislatures are not suspended. In brief, the Constitution becomes unitary rather than federal.The laws made by Parliament on the state subjects during a National Emergency become inoperative six months after the emergency has ceased to operate. Notably, while a proclamation of national emergency is in operation, the President can issue ordinances on the state subjects also, if the Parliament is not in session.