Section 457. Protocols

a. Police Department. Within ninety days after the
  appointment of the last member of the board  pursuant  to  section  four
  hundred and fifty, the board and the police commissioner shall establish
  a  protocol  pursuant  to  which  information  shall  be  exchanged  and
  cooperation  between  the  board  and  the  department  facilitated   in
  accordance with the provisions of this chapter. Such protocol shall also
  provide  for  means of avoiding and resolving potential disputes arising
  out of investigations independently undertaken by both the board and the
  department.
    b. District Attorneys. Within ninety days after the appointment of the
  last member of the board pursuant to section four hundred and fifty, the
  board shall enter into a protocol  with  each  of  the  city's  district
  attorneys  pursuant to which information shall be exchanged, cooperation
  between the board and the district attorneys facilitated, and  potential
  disputes  arising  out of investigations independently undertaken by the
  board and a district attorney's office shall be  avoided  and  resolved.
  Any  investigation  undertaken by the board pursuant to paragraphs three
  or four of subdivision a of section four hundred and fifty-one shall  be
  conducted  in accordance with the provisions of the applicable protocol,
  if any, entered into pursuant to this  subdivision.  Provided,  however,
  that  the  lack  of  a  protocol  pursuant to this subdivision shall not
  prohibit the board from undertaking any investigation authorized by this
  chapter.
    c. Civilian Complaint Review  Board.  Within  ninety  days  after  the
  appointment  of  the  last  member of the board pursuant to section four
  hundred and fifty, the board and the  civilian  complaint  review  board
  established  pursuant  to  chapter  eighteen-a  of  this  charter  shall
  establish a protocol pursuant to which (i) the board, if in  the  course
  of  any  assessment,  audit  or  investigation  undertaken  pursuant  to
  subdivision a of section four hundred and fifty-one, forms a  reasonable
  belief  that  any  act  of  misconduct,  as  defined in paragraph one of
  subdivision c of section four hundred and forty  of  this  charter,  has
  occurred or is occurring, shall as soon as practicable, report the facts
  that  support  such  belief to the civilian complaint review board; (ii)
  the  civilian  complaint  review  board,  if  in  the   course   of   an
  investigation  authorized pursuant to chapter eighteen-a of the charter,
  forms a reasonable belief that any act of corruption has occurred or  is
  occurring,  shall  as soon as practicable, report the facts that support
  such belief to the board; and (iii) information shall be  exchanged  and
  cooperation between the boards facilitated.