The decision will have huge implications for Indigenous peoples who have lost their land rights and for state and territory governments that may be liable for compensation.
It is possible the home affairs minister is in breach of Section 44(v) of the Constitution – and if the High Court were to find him so, it would cause yet another headache for the government.
Just when we thought the dual citizenship debacle was coming to an end, there may be another sting in our Constitution's tail.
Today's High Court decision on whether Labor Senator Katy Gallagher is eligible to hold her seat will have significant implications for the whole parliament.
Despite a public focus on punitive approaches to welfare fraud, the number of social security fraud prosecutions has fallen in recent years.
If the purpose of this bill is to prevent foreign donations from influencing elections, it manifestly does not achieve that outcome.
The now-infamous section 44 of the Australian Constitution was a last-minute change by the authors, drafted in private and accepted out of weariness.
That it has taken more than five months and a compulsory declaration procedure for some MPs' dual citizenship issues to come to light reflects extremely badly on them.
Katy Gallagher is one of several Labor MPs likely to be referred to the High Court as the citizenship crisis turns on the opposition.
Michelle Grattan and Nick Klomp discuss the week in politics.
Changing the Constitution is the only way to draw a line under this chaos.
Hollie Hughes was the next candidate on the Coalition joint ticket for the 2016 election and was set to get the position on the recount.
The government has agreed to Labor's December 1 deadline and tougher conditions in a deal on MPs citizenship disclosure.
John Alexander is expected to resign over the weekend, becoming the latest MP to be claimed by the dual citizenship crisis.
The bottom line is that voters want the citizenship matter fixed quickly.
The Turnbull government is trying to limit the damage from the citizenship crisis with a plan to have all MPs make declarations about their circumstances.
Labor has been on a unity ticket with the Coalition in opposing an audit, but as the crisis continues to unfold it has moved to a position that falls short of bringing in an outside auditor.
The sudden exit from parliament of Senate President Stephen Parry has turned into a toxic blame game, in a further sign of a government crumbling into chaos.
Stephen Parry's departure is feeding into the current tensions between the Nationals and the Liberals.
The government has been thrown into a fresh crisis, with Senate President Stephen Parry announcing he may be a British citizen.