Something

on *:text:!chanban*:#: { 
  if ($nick isop $chan || $nick ishop $chan) { 
    /mode # -b ~c: $+ $2
  } 
}

on *:text:!dechanban*:#: { 
  if ($nick isop $chan || $nick ishop $chan) { 
    /mode # -b ~c: $+ $2
  } 
}