'There are a number of restrictions on the freedom of discussion in the federal legislature. For example, the act forbids ... any discussion of, or the asking of questions about, a matter connected with an Indian State, other than a matter with respect to which the federal legislature has power to make laws for that state, unless the Governor-General in his discretion is satisfied that the matter affects federal interests or affects a British subject, and has given his consent to the matter being discussed or the question being asked.'