20.—(1) At the conclusion of the evidence the accused may address the commanding officer on any matter.
(2) After hearing the evidence and any address from the accused the commanding officer shall determine whether or not each charge denied by the accused has been proved and record his finding.
(3) The commanding officer shall not determine that a charge that was denied has been proved unless, on the basis of all of the evidence heard, he is sure that the accused committed the offence charged.
(4) Rule 22 shall apply in relation to all charges—
(a)which were denied and determined to have been proved;
(b)which were admitted but in respect of which evidence was heard by virtue of rule 12(4).