A person, partnership, association or corporation holding property for the benefit of another, except when acting under wills allowed or trusts created before November 27, 1894, may make such covenants with the sureties upon his or her official bond as will enable such fiduciary to secure such sureties from loss in any manner provided by section 4145 of this title. However, if such fiduciary was appointed by the decree of any court within this State, the approval of such court shall first be obtained to such covenant.