50.—(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 it shall be signed by a member of the court hearing the appeal.
(3) Each exhibit shall be retained with the record of the proceedings, unless in the opinion of the judge advocate, having regard to the nature of the exhibit or for some 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 steps are taken for its safe custody.