Finance Minister Juan Vital Sourrouille devised the Austral plan.

In 1985, provisional issues were made consisting of $a1000, $a5000 and $a10,000 notes overstamped with the values ₳1, ₳5 and ₳10.

Between 1985 and 1991, the following notes were issued by the Banco Central: All banknotes except the provisional types show on the back an image of Liberty with a torch and shield.

The provisional banknotes were produced from modified peso ley plates.

On the obverses, the word PESOS were erased, whilst the reverse designs substituted the picture with the denomination written in words without spaces in several rows.