As an alternative, a number of water districts in the High Plains region of the United States have introduced regulations based on historically-irrigated areas, e.g. Nebraska (NE DNR and TPNRD, 2013). For example, the National Water Initiative in Australia, an agreement that all states have signed, governs groundwater law. In general, the Initiative requires a move towards economic water management and, as a result, a number of incentive-based groundwater policies have been implemented.