Basin Plan 2012

This section and sections 6.08F and 6.08G set out how to calculate the one‑off adjustment to the cumulative balance of a surface water SDL resource unit.

For each relevant water accounting period for the surface water SDL resource unit, sum the maximum quantity of water permitted to be taken by each form of take for consumptive use from the surface water SDL resource unit (annual permitted take) in accordance with section 6.08G.

For the same relevant water accounting period, sum the quantity of water actually taken by each form of take for consumptive use from the surface water SDL resource unit (annual actual take) in accordance with section 6.08G.

For the purposes of calculating the one‑off adjustment to the cumulative balance of a surface water SDL unit, a relevant water accounting period, for the surface water SDL resource unit, means a water accounting period that begins on or after 1 July 2019, other than the water accounting period in which the register of take for the surface water SDL resource unit commences or any later water accounting period.

For each relevant water accounting period, if the annual actual take is greater than the annual permitted take, the difference is a debit.

For each relevant water accounting period, if the annual actual take is less than the annual permitted take, the difference is a credit.

For each relevant water accounting period, if there is no difference between the annual actual take and the annual permitted take, the difference is zero.

As a result of the calculations made under subsections (1) to (3), determine the one‑off adjustment to the cumulative balance by summing the total differences between annual permitted take and annual actual take for each relevant water accounting period for the surface water SDL resource unit.

If, in a relevant water accounting period, the circumstances mentioned in the example in paragraph 6.12(4)(b) apply, the one‑off adjustment for the surface water SDL resource unit is to be adjusted by including the amount attributable to those circumstances as a credit, and subsection 6.11(5) does not apply to the relevant water accounting period.

The one‑off adjustment for the surface water SDL resource unit is to be adjusted to account for any disposal or acquisition of held environmental water for each relevant water accounting period.

Record the one‑off adjustment on the register of take as either a debit, a credit or zero.

For the water accounting period in which the one‑off adjustment is recorded, the cumulative balance determined under subsection 6.11(4) is to include the effect of the one‑off adjustment.

Subject to this section, the annual permitted take and the annual actual take are to be worked out using the method set out in the water resource plan for the surface water SDL resource unit for the purposes of sections 10.10 and 10.15.

Section 10.10 requires a water resource plan to set out a method for determining the maximum quantity of water permitted to be taken by each form of take for consumptive use from the surface water SDL resource unit in each water accounting period.

Section 10.15 requires a water resource plan to set out how the quantity of water actually taken for consumptive use by each form of take from each SDL resource unit will be determined after the end of a water accounting period using the best information available at the time.

If the annual permitted take or the annual actual take cannot be worked out in accordance with subsection (1) because the data is not available for a form of take, the annual permitted take and the annual actual take are to be:

the long‑term annual average take for that form of take; or

worked out in accordance with an alternative method determined by the Authority in consultation with the relevant Basin State before whichever of the following applies:

if the water resource plan for the surface water SDL resource unit is accredited as at the commencement of this section—on or before the first 30 June after that commencement;

if the water resource plan for the surface water SDL resource unit is not accredited as at the commencement of this section—on or before 30 June of the water accounting period in which the register of take commences.

The Authority must publish the method used on its website.