(1) The court may —
(a) appoint a new next friend in substitution for an existing one;
(b) direct that a person may not act as a next friend; or
(c) terminate a next friend's authority to act.
(2) The court may make an order under paragraph (1) with or without an application.
(3) An application for an order under paragraph (1) must be supported by evidence on affidavit.
(4) The court may not appoint a next friend under this rule, unless it is satisfied that the person to be appointed complies with the conditions specified in rule 23.6.