Section 450.50. Appeal by people from order suppressing evidence; filing of statement in appellate court

1.  In taking an appeal, pursuant  to  subdivision  eight  of  section
  450.20,  to  an intermediate appellate court from an order of a criminal
  court suppressing evidence, the people  must  file,  in  addition  to  a
  notice  of  appeal  or,  as  the  case may be, an affidavit of errors, a
  statement asserting that the deprivation of  the  use  of  the  evidence
  ordered  suppressed  has  rendered the sum of the proof available to the
  people with respect to a criminal charge which has  been  filed  in  the
  court  either (a) insufficient as a matter of law, or (b) so weak in its
  entirety that any reasonable possibility of prosecuting such charge to a
  conviction has been effectively destroyed.
    2.  The taking of an appeal by the  people,  pursuant  to  subdivision
  eight  of section 450.20, from an order suppressing evidence constitutes
  a bar to the prosecution of  the  accusatory  instrument  involving  the
  evidence  ordered suppressed, unless and until such suppression order is
  reversed upon appeal and vacated.