Section 779-A. Declaration of delinquency concerning juvenile delinquents and persons in need of supervision

If, at any time during the period of
  a disposition of probation, the court has reasonable  cause  to  believe
  the  respondent  has  violated  a  condition  of the disposition, it may
  declare the respondent delinquent and  file  a  written  declaration  of
  delinquency.    Upon  such  filing,  the  respondent  shall  be declared
  delinquent of his disposition of probation and such disposition shall be
  tolled. The court then must promptly  take  reasonable  and  appropriate
  action  to  cause  the respondent to appear before it for the purpose of
  enabling the court to make a final determination  with  respect  to  the
  alleged  delinquency.  The  time  for  prompt  court action shall not be
  construed  against  the  probation  service  when  the  respondent   has
  absconded  from  probation  supervision and the respondent's whereabouts
  are unknown. The court must be notified promptly of the circumstances of
  any such probationers.