Section 733. Persons who may originate proceedings

The following persons
  may originate a proceeding under this article:
    (a) a peace officer, acting pursuant  to  his  special  duties,  or  a
  police officer;
    (b) the parent or other person legally responsible for his care;
    (c)  any  person  who  has  suffered injury as a result of the alleged
  activity of a person alleged to be in need of supervision, or a  witness
  to such activity;
    (d)  the recognized agents of any duly authorized agency, association,
  society or institution; or
    (e) the presentment agency that consented  to  substitute  a  petition
  alleging  the  person is in need of supervision for a petition alleging,
  that the person is a juvenile delinquent pursuant to section 311.4.