58.—(1) Any exhibit admitted in evidence shall be marked sequentially with either a number or a letter.
(2) Each exhibit or a label attached to each exhibit shall be signed by the judge advocate.
(3) Each exhibit shall be retained with the record of proceedings, unless in the opinion of the judge advocate having regard to the nature of the exhibit or for other good reason it is not expedient to retain the exhibit with the record.
(4) Where an exhibit is not retained with the record of proceedings, the judge advocate shall ensure that proper steps are taken for its safe custody.