Two challenges against the Queensland government's constitutional right to keep the state's borders closed amid the coronavirus crisis are set to return to the High Court.
Billionaire businessman Clive Palmer and a group of businesses and individuals named Travel Essence launched separate legal proceedings after the borders were closed in March.
They are intent on forcing Premier Annastacia Palaszczuk to reverse her government's decision to isolate the state, saying they want to limit the economic damage caused by keeping the borders shut.
The challenges are unlikely to be heard before the borders reopen, however.
On Friday, Chief Justice Susan Kiefel told lawyers for the parties it was unlikely the cases would be heard before the end of June after learning the opposing sides were having difficulty agreeing on the terms of the battle.
It comes as Ms Palaszczuk on Monday said the government would revisit the decision to close the borders at the end of June.
Stage three of the state's coronavirus recovery roadmap has always planned for interstate travel to be permitted from July 10, conditional on Queensland chief health officer Jeannette Young's advice.
Currently, school students, workers and freight drivers can enter the state without an issue, but Queensland is closed to anyone else.
Mr Palmer is also challenging the Western Australian government's right to close its border.
All three cases will return to the Brisbane courtroom for a directions hearing on Tuesday.