Final Canadian Expeditionary Force (CEF) Award Criteria
1. Members of the CEF who served at the front and had retired or relinquished their commissions, been honourably discharged, or returned to or retained in Canada on duty.
2. Members of the Imperial Forces, subject to the same conditions as members of the CEF, provided they were Canadian residents on the 4th day of August, 1914, and had returned to reside in Canada.
Ex-members of the Royal Air Force (RAF) who served only in England were also eligible for the badge if they had been "actively engaged with the enemy whilst on the strength of an operational unit in Great Britain." (National Archives of Canada, RG24, Vol. 1764, File DHS 12-3, "Circular Letter No. 50, October16, 1919. Issue of Class "A" War service Badge Ex-member of the Royal Air Force who served only in England.")