54.—(1) The chairman of a Health Board must retain among the records of the Health Board—
(a)for four years, the electronic copy mentioned in rule 51(1)(b); and
(b)for one year, everything else forwarded to the chairman under rule 52.
(2) At the expiry of the period of four years or, as the case may be, one year, the Health Board chairman must destroy anything retained under this rule unless directed not to do so by a sheriff principal or the Court of Session under rule 53.