The Superior Court shall have power, at any time before final distribution, to appoint some fit and proper person to fill any vacancy in the office of trustee under the will, whether resulting from declination as provided for in Section 3323 of this Title, from removal, or otherwise, if such appointment is necessary to carry out the trust. Such appointment may be made by the Superior Court upon the written application of any person interested in the trust, filed in the probate proceedings, and shall be made only after notice to all parties interested in the trust, given as required by Section 1517 of this Title upon petition for the probate of a will.

SOURCE: California Probate Code, § 1125 (as amended).