Section 18-4-13 - Parties to management proceedings - Guardians ad litem - Costs(a) Any persons who have any vested, contingent, executory, or future right, title, interest, or estate in or to any part of the trust property, and any persons who might by any future contingency have any right, title, interest, or estate, may join in bringing a proceeding under § 18-4-10, and any persons who do not join may be made parties defendant.(b) Any persons not ascertained or not in being, who are or who may become entitled to any contingent, executory, or other future right, title, interest, or estate, together with the interests of these persons, may be designated and described in the proceeding for the purpose of having guardians ad litem appointed to represent them and their interests as provided in this section.(c) Notice of the pendency of the proceeding shall be given to all parties defendant and to all persons not in being or not ascertained in the manner that the court may order.(d) The court shall, in every proceeding, appoint guardians ad litem, who may also act as counsel, to represent parties non sui juris and persons not in being or not ascertained, who are designated and described according to this section, and the interests of these parties and persons.(e) The cost of the appearance and services of the guardians ad litem and counsel, to be determined by the court, shall be paid, as the court may order, either out of the trust property generally, or out of the proceeds of any disposition of the property which may be ordered, or by the party or parties to the proceeding as the court may order.G.L. 1909, ch. 259, § 11; P.L. 1917, ch. 1501, § 1; G.L. 1923, ch. 303, § 11; G.L. 1938, ch. 486, § 20; G.L. 1956, § 18-4-13.