Rule 16 Representation of person or class

Where any person or class of persons is beneficially interested in any proceedings for the administration of the estate of a deceased person or for the execution of the trusts or the construction of any instrument, [^f1 the judge or district judge as the case may be] may, whether such person or class has been ascertained or not, appoint any person to represent such person or class, and any order made in the presence of the person so appointed shall be binding on the person or class so represented.