Commonwealth Consolidated Acts Commonwealth Consolidated ActsWhere a contributing member has been retired otherwise than on the ground of invalidity or of physical or mental incapacity to perform his duties but, after his retirement, the Chief of the Defence Force or a person authorized in writing by the Chief of the Defence Force informs CSC that, at the time the member was retired, grounds existed on which he could have been retired on the ground of invalidity or of physical or mental incapacity to perform his duties, he may, for the purposes of this Act, be treated as if he had been retired on that ground.