MO Rev Stat § 472.300 (2021)
2021 Missouri Revised Statutes|Title XXXI - Trusts and Estates of Decedents and Persons Under Disability|Chapter 472 - Probate Code — General Provisions|Section 472.300 - Proceedings involving trusts — estates — minors — disabled or incapacitated persons — supervised settlements, procedure.

Effective - 28 Aug 1983   472.300. Proceedings involving trusts — estates — minors — disabled or incapacitated persons — supervised settlements, procedure. — In judicial proceedings involving trusts or estates of decedents, minors, disabled and incapacitated persons, and in judicially supervised settlements, the following apply:  (1) Interests to be affected shall be described in pleadings which give reasonable information to owners by name or class, by reference to the instrument creating the interest, or in other appropriate manner;  (2) Persons are bound by orders binding others in the following cases:  (a) Orders binding the sole holder or all coholders of a power of revocation or a presently exercisable general power of appointment, including one in the form of a power of amendment, bind other persons to the extent their interests, as objects, takers in default, or otherwise, are subject to the power;  (b) To the extent there is no conflict of interest between them or among persons represented, orders binding a guardian bind the ward; orders binding a conservator bind the protectee; orders binding a trustee bind beneficiaries of the trust in proceedings to probate a will establishing or adding to a trust, to review the acts or accounts of a prior fiduciary and in proceedings involving creditors or other third parties; and orders binding a personal representative bind persons interested in the undistributed assets of a decedent's estate in actions or proceedings by or against the estate. If there is no conflict of interest and no conservator or guardian has been appointed, a parent may represent and bind his minor child;  (c) An unborn or unascertained person who is not otherwise represented is bound by an order to the extent his interest is adequately represented by another party having a substantially identical interest in the proceeding;  (3) Notice is required as follows:  (a) Notice as prescribed by section 472.100 shall be given to every interested person, or to one who can bind an interested person as described in paragraphs (a) and (b) of subdivision (2) above. Notice may be given both to a person and to another who may bind him;  (b) Notice is given to unborn or unascertained persons, who are not represented under paragraph (a) or (b) of subdivision (2) above, by giving notice to all known persons whose interests in the proceedings are substantially identical to those of the unborn or unascertained persons;  (4) At any point in a proceeding, a court may appoint a guardian ad litem to represent the interest of a minor, an incapacitated, disabled, unborn, or unascertained person, or a person whose identity or address is unknown, if the court determines that representation of the interest otherwise would be inadequate. If not precluded by conflict of interests, the same guardian ad litem may be appointed to represent several different persons or interests. ­­-------- (L. 1980 S.B. 637, A.L. 1983 S.B. 44 & 45)