Section 215.59. Bail jumping and failing to respond to an appearance ticket; defense

In any prosecution for bail  jumping  or  failing  to  respond  to  an
  appearance ticket, it is an affirmative defense that:
    1.  The  defendant's  failure to appear on the required date or within
  thirty days thereafter was unavoidable and due to  circumstances  beyond
  his control; and
    2.  During  the period extending from the expiration of the thirty day
  period to the commencement of the action, the defendant either:
    (a) appeared voluntarily as soon as he was able to do so, or
    (b) although he did not so appear,  such  failure  of  appearance  was
  unavoidable and due to circumstances beyond his control.