A document is an exempt document if public disclosure of the document would, apart from this Act and any immunity of the Crown:
(a) be in contempt of court;
(b) be contrary to an order made or direction given by a Royal Commission or by a tribunal or other person or body having power to take evidence on oath; or
(c) infringe the privileges of the Parliament of the Commonwealth or of a State or of a House of such a Parliament or of the Legislative Assembly of the Northern Territory.