When given a queens commission in the Canadian forces is this commission good for life or is it surrendered on leaving the forces?

Answer 1

All officers of the Canadian (and British, Australian and New Zealand) armed forces are commissioned, i.e., 'constituted and appointed' to their rank and authority by the Queen either directly or through her representative such as the Governor-General.
A commission is a personal appointment between the Sovereign and the officer whose duties and responsibilities are then exercised in the Navy, Army, or Air Force until and sometimes beyond retirement.
Unless one resigns one's commission in writing to a superior officer, the commission and last rank are retained for life.
It is considered very bad form to resign a commission.
Upon retirement from active or reserve duty, one's rank is retained but is not normally used by those below Field Rank, for example, Junior officers with the rank of Captain, Lieutenant and Second-Lieutenant (Army) would not normally use their rank in most circumstances. Those with the rank of Major, Lieutenant-Colonel, Colonel, Brigadier,
and Generals generally are identified with their rank with the addition of 'Ret'd'.