(1) In a proceeding in relation to a deceased person's estate, everyone having a beneficial interest in or claim against the estate need not be parties, but the plaintiff may make parties of any of them the plaintiff considers appropriate.
(2) In a proceeding in relation to a trust, everyone having a beneficial interest under the trust need not be parties, but the plaintiff may make parties of any of them the plaintiff considers appropriate.
(3) This rule has effect despite rule 213 (Including parties—joint entitlement).