6. c. 81) was enacted by the Parliament of the United Kingdom on 3 September 1939, the day the United Kingdom declared war on Germany at the start of the Second World War.

[2] By a royal declaration in January 1941, the term Great Britain was extended to include the Isle of Man.

[3] Despite the end of the war in September 1945, the Labour government kept the act in force until 1948, when its effects were continued in a modified form by the enactment of the National Service Act 1948 (11 & 12 Geo.

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