The chief executive must not make the decision unless the cumulative drawdown for the groundwater-dependent ecosystem, after making the decision, would be less than 0.4m.
Note—A water management protocol must include ways for the chief executive to estimate the cumulative drawdown, or otherwise be satisfied the cumulative drawdown, for a groundwater-dependent ecosystem after making a particular decision is less than 0.4m. See section 58 (2)(a).