International Covenant on Civil and Political Rights

THe Australian Government is a signatory to this international law. No court can ignore it, the government cannot disobey it. Download and read the entire document, and take special note of Section 19 (1) and (2). This section protects absolutely our right to freedom of speech and freedom of expression:
Article 19
1. Everyone shall have the right to hold opinions without interference.
2. Everyone shall have the right to freedom of expression; this right shall
include freedom to seek, receive and impart information and ideas of all
kinds, regardless of frontiers, either orally, in writing or in print, in the form
of art, or through any other media of his choice.