The Commonwealth posted their final defence document yesterday, and its just more of what I already wrote about in my article on the topic.
Invocations of the "evils of Nazi Germany" in the first pages, attempts to influence the atmosphere of the court and emotionalise the case.
And some assertions that Nazis dont deserve free speech and the right to political communication.
Then more weak engagement on Constitutionality of their legislating (because there is none), they attempt to rely on the CERD treaties, which obviously some UN treaties don't overrule our Constitution.
Plus, they already conceded in the Special Case agreed facts, that the party is a legitimate party under the law, and planned to contest elections, so their attempted framing it as an illegitimate party is already defunct by their own agreement.
You can read it yourself on the DLS
https://dls.hcourt.gov.au/static/PublicSearch