Article 46-5Duties of the Administrator of an Exclusively-Owned Area with an Unknown Owner
第四十六条の五（所有者不明専有部分管理人の義務）
The administrator of an exclusively-owned area with an unknown owner must exercise their authority with the due care of a prudent manager for the benefit of the owner of the exclusively-owned area, etc. with an unknown owner (including a person who holds a share of co-ownership in it).
所有者不明専有部分管理人は、所有者不明専有部分等の所有者（その共有持分を有する者を含む。）のために、善良な管理者の注意をもつて、その権限を行使しなければならない。
If an order for management of an exclusively-owned area with an unknown owner has been issued covering the shares of co-ownership of multiple persons, the administrator of an exclusively-owned area with an unknown owner must exercise their authority in good faith and impartially for the benefit of all of the persons who hold the shares of co-ownership covered by that order for management of an exclusively-owned area with an unknown owner.
数人の者の共有持分を対象として所有者不明専有部分管理命令が発せられたときは、所有者不明専有部分管理人は、当該所有者不明専有部分管理命令の対象とされた共有持分を有する者全員のために、誠実かつ公平にその権限を行使しなければならない。