Section 331.6. Discovery; sanctions

1. If, during the course of discovery
  proceedings, the court finds that a party has failed to comply with  any
  of  the  provisions of sections 331.2 through 331.7, the court may order
  such party to permit discovery of the property not previously disclosed,
  grant a continuance, issue a protective order, prohibit the introduction
  of certain evidence or the calling of  certain  witnesses  or  take  any
  other appropriate action.
    2. The failure of the presentment agency to call as a witness a person
  specified  in subdivision one of section 331.2 or any party to introduce
  disclosed material at the fact-finding  hearing  shall  not,  by  itself
  constitute  grounds for any sanction or for adverse comment thereupon by
  any party.