Reserved occupation

A reserved occupation (also known as essential services) is an occupation considered important enough to a country that those serving in such occupations are exempt—in fact forbidden—from military service. In a total war, such as the Second World War, where most fit men of military age were conscripted into the armed forces, exceptions were given to those who performed jobs vital to the country and the war effort which could not be abandoned or performed by others. Not only were such people exempt from being conscripted, they were often prohibited from enlisting on their own initiative, and were required to remain in their posts. Examples of reserved occupations include medical practitioners and police officers, but what is or is not a reserved occupation will depend on war needs and a country's particular circumstances.