In an administration proceeding or a proceeding within Rule 54.02 —
(a) all the executors of the will of the deceased or administrators of the estate or trustees of the trust, as the case may be, shall be parties;
(b) where the proceeding is brought by executors, administrators or trustees, any of them who does not consent to being joined as a plaintiff shall be made a defendant;
(c) notwithstanding anything in Rule 9.03(1), and without limiting the powers of the Court under Order 9, all persons having a beneficial interest in or claim against the estate or having a beneficial interest under the trust, as the case may be, need not be parties, and the plaintiff may make such of those persons parties as the plaintiff thinks fit;
(d) where in the taking of an account of debts or liabilities under a judgment or order in the proceeding, a person not a party makes a claim—
(i) a party other than the executors or administrators or trustees shall not be entitled to attend before the Court in relation to that claim except by leave of the Court; and
(ii) the Court may direct or allow any party to attend before the Court either in addition to or in substitution for the executors, administrators or trustees.