79.—(1) This rule applies to any prisoner who is committed to prison—
(a)in default of payment of any sum which requires to be paid by virtue of any order of a court; and
(b)in circumstances where the prisoner may be released on payment of any sum.
(2) A prisoner to whom this rule applies is entitled to communicate at any reasonable time with any person for the purpose of arranging payment of the sum which would secure his or her release.