Emergency: It is a complex and sudden situation when there is a needfor taking speedy action.

There are three types of emergencies:

1. Emergency of War:

When emergency is declared as a result of war or external aggression, it is called emergency of war.

2. Emergency of Subversion:

When emergency is declared due to internal disturbances within the state e.g. to suppress civil war or any anti–government movement or a riot in any particular area if the country or to face any natural disaster, it is called emergency of subversion. For example, in Bangladesh emergency was declared four times due to internal disturbance.

3. Economic Emergency:

When emergency is declared with a view to overcoming a situation in which the economy if the state is about to breakdown or has broken down, it is called economic emergency. It is worthy of notice here that from the broader point of view economic emergency should be included in emergency of subversion but constitutions and laws of some countries provide specifically, on addition to emergency of subversion, for the economic or financial emergency.