Section 727. Rules of court authorizing release before filing of petition

(a) The agency responsible for operating a detention facility  or  in  a
  city  of  one  million  or  more, the agency responsible for operating a
  foster care facility, may release a child in custody before  the  filing
  of  a petition to the custody of his parents or other relative, guardian
  or legal custodian when the events occasioning the taking  into  custody
  appear to involve a petition to determine whether a person is in need of
  supervision  rather  than  a petition to determine whether a person is a
  juvenile delinquent.
    (b) When a release is made under this section such  release  may,  but
  need  not,  be  conditioned  upon the giving of a recognizance in accord
  with section seven hundred twenty-four (b) (i).
    (c) If the probation service for any reason does not release  a  child
  under  this  section, the child shall promptly be brought before a judge
  of the court, if practicable, and  section  seven  hundred  twenty-eight
  shall apply.