A manager of the property in co-ownership may perform any act relating to the management of the property in co-ownership; provided, however, that no co-owner may make changes (excluding those that do not involve an extreme change in the shape or function; the same applies in the following paragraph) to the property in co-ownership without the consent of all co-owners.
共有物の管理者は、共有物の管理に関する行為をすることができる。ただし、共有者の全員の同意を得なければ、共有物に変更（その形状又は効用の著しい変更を伴わないものを除く。次項において同じ。）を加えることができない。
If a manager of the property in co-ownership is unable to ascertain the identity of a co-owner or their whereabouts, the court, at the request of the manager of the property in co-ownership, may render a judicial decision to the effect that changes may be made to the property in co-ownership with the consent of the co-owners other than the co-owner.
共有物の管理者が共有者を知ることができず、又はその所在を知ることができないときは、裁判所は、共有物の管理者の請求により、当該共有者以外の共有者の同意を得て共有物に変更を加えることができる旨の裁判をすることができる。
When the co-owners have decided on particulars regarding the management of the property in co-ownership, a manager of the property in co-ownership must perform the manager's duties in accordance with their decisions.
共有物の管理者は、共有者が共有物の管理に関する事項を決した場合には、これに従ってその職務を行わなければならない。
Any acts of a manager of the property in co-ownership performed in violation of the provisions of the preceding paragraph have no effect on the co-owners; provided, however, that this may not be duly asserted by a co-owner against a third party acting in good faith.
前項の規定に違反して行った共有物の管理者の行為は、共有者に対してその効力を生じない。ただし、共有者は、これをもって善意の第三者に対抗することができない。