Hi Shaun, thanks for your question. Parliament House has a number of places where press briefings can be held. The press gallery, which consists of the offices and studios of a range of news services, is located inside the building. Members of parliament often go there to speak with the media. They can also hold press conferences in other meeting rooms or courtyards in Parliament House.
The Prime Minister often holds televised press conferences or makes announcements using a broadcasting studio inside the building or alternatively in the courtyard near the Prime Minister’s office. However there is no rule that says the Prime Minister, ministers or other members of the government must hold regular press briefings. Members of parliament can choose when they speak to the press.
If you are interested in more information about the press gallery check out this fact sheet.