Section 1060. Public attendance at executive sessions

a.  Except  as
  otherwise provided pursuant to subdivision b of this section, the public
  may attend all sessions or meetings of the following  agencies  whenever
  items on the calendar of such agency are to be considered and acted upon
  in  a  preliminary  or  final  manner:  art commission, conciliation and
  appeals board, environmental control board, board of  health,  landmarks
  preservation  commission,  city  planning commission, board of standards
  and appeals, tax commission,  youth  board,  and  the  council  and  its
  committees.
    b.  Any agency specified pursuant to subdivision a of this section may
  convene an executive session closed to the  public  by  a  three-fourths
  vote  of all of its members, but shall not take final action at any such
  meeting.