(a) Any guardian, personal representative, trustee or other fiduciary may make, in the county in which appointed, application to the chancery court, or to any other court therein having concurrent jurisdiction, for permission to retain and hold in unchanged form any security or investment originally forming a part of the estate, and the court shall have the authority and power to authorize the guardian, personal representative, trustee or other fiduciary, to retain and hold in unchanged form any security or investment originally forming a part of the estate, upon it being made to appear to the court that retention of the security or investment is to the manifest interest of the estate. The authority to retain securities or investments, when granted to the fiduciary by the instrument under which the fiduciary is acting, is not affected by the foregoing provisions.

(b) The application in every such case shall be made by bill or petition, and the beneficiaries be made the defendants and served with process, and the cause shall be conducted and heard in the same manner as other suits in chancery.

(c) A guardian ad litem shall be appointed for all defendants under disability, and the decree of the court authorizing the retention of the securities or investments shall set out fully the reasons and object moving the court in granting to the fiduciary the authority so to do.

(d) It is not intended to impose upon a fiduciary any duty or obligation in addition to those arising under previously existing law, nor is it intended to change, modify or alter any investment statute of the state, except insofar as variations from those statutes may be made through proceedings authorized by this section.