When emergency is declared, whatever may be the reason behind the declaration, throughout the whole territory of the state, it is called national emergency. On the other hand, when emergency is declared in a particular area of a unitary state or in a state of a federation, it is partial or state emergency.

On the basis of its nature emergency may be of following types-

Three types of emergencies are: 

1.Emergency of war: When emergency is declared as a result of war or external aggression ,its called emergency provision.

2.Emergency of subversion: