Section 321.4. Withdrawal of an admission or denial

1. A respondent who has
  entered  a  denial  of a petition may as a matter of right withdraw such
  denial at any time before the conclusion of the fact-finding hearing and
  enter an admission to the entire petition.
    2. At any time prior to the entry of a finding under section 352.1 the
  court in its discretion may permit  a  respondent  who  has  entered  an
  admission  to the entire petition or to part of the petition to withdraw
  such admission, and in such event the entire petition as it  existed  at
  the time of the admission shall be restored.