Section 214. Management and confidential employees; membership and office in employee organizations

No  managerial  or confidential employee, as  determined pursuant to subdivision seven of section two hundred  one  of
  this  article,  shall  hold  office  in  or  be a member of any employee
  organization which is or seeks to become pursuant to  this  article  the
  certified  or recognized representative of the public employees employed
  by the public employer of such managerial or confidential employee.