By January 1, 2016, DWR is required to adopt emergency regulations that specify the information required to comply with Water Code 10722.2, which outlines the process that local agencies shall follow when requesting modifications to existing boundaries of groundwater basins and subbasins. The basin boundary regulations will also identify the methodology and criteria that will be applied by DWR when reviewing and approving the modification requests. In general, local agencies will be required to address all of the following:
How to assess the likelihood that the proposed basin can be sustainably managed.
How to assess whether the proposed basin would limit the sustainable management of adjacent basins.
How to assess whether there is a history of sustainable management of groundwater levels in the proposed basin.
Please see here for important dates: http://water.ca.gov/groundwater/sgm/basin_boundaries.cfm