Cal. Water Code § 10722.2

(a) A local agency or an entity directed by the court in an adjudication action to file the request may request that the department revise the boundaries of a basin, including the establishment of new subbasins. A request shall be supported by the following information:
1. (1) Information demonstrating that the proposed adjusted basin can be the subject of sustainable groundwater management.
2. (2) Technical information regarding the boundaries of, and conditions in, the proposed adjusted basin.
3. (3) Information demonstrating that the entity proposing the basin boundary adjustment consulted with interested local agencies and public water systems in the affected basins before filing the proposal with the department.
4. (4) Other information the department deems necessary to justify revision of the basin’s boundary.
(b) By January 1, 2016, the department shall adopt regulations regarding the information required to comply with subdivision (a), including the methodology and criteria to be used to evaluate the proposed revision. The department shall adopt the regulations, including any amendments thereto, authorized by this section as emergency regulations in accordance with the Administrative Procedure Act (Chapter 3.5 (commencing with Section 11340) of Part 1 of Division 3 of Title 2 of the Government Code). The adoption of these regulations is an emergency and shall be considered by the Office of Administrative Law as necessary for the immediate preservation of the public peace, health and safety, or general welfare. Notwithstanding the Administrative Procedure Act, emergency regulations adopted by the department pursuant to this section shall not be subject to review by the Office of Administrative Law and shall remain in effect until revised by the department.
(c) Methodology and criteria established pursuant to subdivision (b) shall address all of the following:
1. (1) How to assess the likelihood that the proposed basin can be sustainably managed.
2. (2) How to assess whether the proposed basin would limit the sustainable management of adjacent basins.
3. (3) How to assess whether there is a history of sustainable management of groundwater levels in the proposed basin.
(d) Prior to adopting the regulations pursuant to subdivision (b), the department shall conduct three public meetings to consider public comments. The department shall publish the draft regulations on its Internet Web site at least 30 days before the public meetings. One meeting shall be conducted at a location in northern California, one meeting shall be conducted at a location in the central valley of California, and one meeting shall be conducted at a location in southern California.
(e) The department shall provide a copy of its draft revision of a basin’s boundaries to the California Water Commission. The California Water Commission shall hear and comment on the draft revision within 60 days after the department provides the draft revision to the commission.