Your medals come from or are authorized by the Queen (through the Chancellery, which is part of the office of the Governor General), not the Canadian Forces. The CF only dictates how they are worn on a CF uniform (e.g. positioning). Any order, decoration or medal that is part of the Canadian Honours System (http://www.cmp-cpm.forces.gc.ca/dhr-ddhr/chc-tdh/index-eng.asp) and that has been properly awarded is authorized for wear on CF uniforms, regardless of when, where or by whom. For example, a ten-year-old who wins a Medal of Bravery for saving a drowning victim can (and should) wear it on his CF uniform upon enrolment, even though he was decorated ten years before he even thought of joining the CF. Another example would be a Scout who was awarded a Diamond Jubilee Medal (there were a few) would be allowed to immediately wear it on his/her CF uniform as well.