An underground water impact report(UWIR) identifies bores in a long-term affected area (LAA) that are predicted at any time in the future to exceed the bore trigger threshold:
a 5 metre decline in water level for a consolidated aquifer;
a 2 metre decline in water level for an unconsolidated aquifer; or
a threshold set by regulation.
It also identifies bores in a subset of the LAA, called the immediately affected area (IAA), that are predicted to exceed
the bore trigger thresholds within the next three years.
In the case where there are multiple petroleum tenures, with more than one tenure holder, adjacent to each other, the government may declare a cumulative management area (CMA) under Chapter 3 of the Water Act 2000.