Section 1504. Renunciation of appointment: retraction thereof 1

A  testamentary  trustee  may renounce his appointment by a duly
  acknowledged instrument.
    2.  By like instrument the renunciation may be retracted at  any  time
  before  letters  have  been issued to another in his place or after such
  letters have been issued, if they have been revoked  or  the  person  to
  whom  they  have  been  issued has become unable to act or disqualified.
  The court may issue letters to the person so retracting upon such notice
  as it may require.
    3.  The instrument of renunciation and the  instrument  of  retraction
  authorized  by  this  section  must  be filed in the office of the court
  having jurisdiction of the trust.