Section 2101. General provisions Unless otherwise indicated 1

All  proceedings under this article and all proceedings within the
  jurisdiction of the court under 202
    (a) May be commenced by a fiduciary, creditor or person interested.
    (b)  May  be  entertained  by  the  court  or  may  be  reserved   for
  determination  in  an  accounting  or  other proceeding or the court may
  decline to entertain the proceeding. All  proceedings  shall  be  deemed
  entertained  unless  rejected  by the court in writing within 15 days of
  submission.
    (c) Shall be commenced by petition, or any other pleading directed  by
  the  court, stating the jurisdictional facts and the facts applicable to
  the particular relief sought.
    2. The jurisdiction of the court over the proceeding shall  be  deemed
  to continue until a decree or order therein is fully satisfied.
    3. If the petition or other pleading is entertained service of process
  shall  be  made  upon  all persons interested in the proceeding and upon
  such other  persons  as  directed  by  the  court  except  that  in  any
  proceeding  against  a  fiduciary  under 2102 service shall be made only
  upon the fiduciary unless the court otherwise directs.
    4. In any such proceeding the  court  may  grant  appropriate  relief,
  grant or deny the relief in whole or in part upon such terms as it deems
  proper  and  make  such decree or order as justice shall require and may
  require a refunding bond.