(a) The settlor may appoint trustees, or grant that power to others, including trust beneficiaries.

(b) If the trust instrument names a person to fill a vacancy or provides a method of appointing a trustee, any vacancy shall be filled or appointment made as provided in the trust instrument.

(c) In all other cases, the court, on petition of an interested person, may appoint any number of trustees consistent with the intention of the settlor and the interests of the beneficiaries.

(d) The petition provided for in subsection (c) of this Code section shall be served upon all income beneficiaries and upon all beneficiaries holding vested remainder interests; provided, however, that the court in its discretion may order service of the petition upon a majority of the income beneficiaries and a majority of the beneficiaries holding vested remainder interests, if it appears to the court that it will be to the advantage of the trust not to require full service upon all beneficiaries; and provided, further, that the court shall have discretion to order any other or additional service that the circumstances require.

(e) A trustee appointed as a successor trustee shall have all the authority of the original trustee.