Lawyers for Andrew Chan and Myuran Sukumaran are calling for a halt to plans to move them from their Bali jail for execution, after receiving a summons to appear in court.
Bali authorities are readying to move the Bali Nine heroin smugglers to the island where they will face the firing squad this week.
But lawyer Todung Mulya Lubis has been asked to front the state administrative court in Jakarta next Tuesday, where he is challenging the presidential decree that denied them clemency.
"We are talking about the lives of human beings," he told reporters.
"Everyone dealing with this must take all arguments put forward in the clemency petition seriously.
"Rejecting the clemency might end up killing, or ending the lives, of the petitioners."
The lawyers argue President Joko Widodo's blanket ban on clemency to Chan, Sukumaran and all death row drug offenders, failed to judge individual cases on their merits as required.
Mr Lubis urged Attorney-General HM Prasetyo to halt plans to move the men from Bali's Kerobokan jail to central Java's Nusakambangan island, where the executions will take place.
"It's hard to reverse that, once they are moved there," he said.
"For the sake of justice and fairness I think it is fair for the attorney-general to wait for this legal process to finish."
But Mr Prasetyo's spokesman said plans were moving ahead, with what he called "D-Day" - the execution date - to be announced once all prisoners were on Nusakambangan.
Prime Minister Tony Abbott has made another appeal for mercy to Mr Joko, whose hard line on drugs is popular in Indonesia.
Australian barrister Michael O'Connell says Chan, 31, and Sukumaran, 33, remain "composed and dignified" in very trying times.
