5Commanding officers for disciplinary purposes

5  Commanding officers for disciplinary purposes  (1) For the purposes of this Act, the Chief of the Defence Force or a service chief or an authorized officer may, by instrument in writing, appoint an officer to exercise all the powers conferred on a commanding officer by or under this Act or such of those powers as are specified in the instrument of appointment.  (2) An instrument of appointment under subsection (1) takes effect on the date of the instrument or on such later date as is specified in the instrument.  (3) For the purposes of this Act, the Chief of the Defence Force or a service chief or an authorized officer may, by instrument in writing, determine that a commanding officer shall not exercise the powers conferred on a commanding officer by or under this Act or such of those powers as are specified in the instrument.  (4) A determination under subsection (3) takes effect on the date of the instrument or on such later date as is specified in the determination.