Australian Myuran Sukumaran will not be executed until his co-Bali Nine conspirator Andrew Chan is formally denied presidential clemency.
Indonesia will execute six death row drug convicts on Sunday, four of whom are foreigners.
All had their final pleas for clemency rejected last month, on the same date as Sukumaran.
Chan's clemency rejection is yet to be issued, but his name is on a list of 20 prisoners assumed to be next in line for the firing squad, in line with President Joko Widodo's stance on drug offenders.
Attorney-General HM Prasetyo says the Sydney pair will be dealt with together.
"When a crime is committed by more than one person the execution must be conducted at the same time," he told reporters in Jakarta on Thursday.
"So Myuran will wait for his turn."
Indonesia's Foreign Ministry meanwhile says it has responded to a letter from Foreign Minister Julie Bishop concerning the pair's plight.
Spokesman Arrmanatha Nasir said Indonesia reiterated its president's serious concern about drugs, and noted the Australians had exhausted all procedural rights.
Chan and Sukumaran were sentenced to death over a 2005 plot to traffic more than 8kg of heroin to Australia.
The six to be executed on Sunday are an Indonesian woman, a Vietnamese woman, and men from Brazil, Malawi, Nigeria, and a man born in Papua described as having "uncertain citizenship".
