Cal. Pub. Resources Code § 6923
For the purpose of more properly conserving the natural resources of any geothermal resources areas, or any part thereof, the lessees thereof may unite with each other or with others in collectively adopting and operating under a cooperative or unit plan of development or operation of such geothermal resources lands, consistent with the provisions of Section 3756 of this code. The commission may, with the consent of the holders of leases involved, establish, alter, change, and revoke any drilling and production requirements of such leases, permit apportionment of production, and may make such regulations with reference to such leases, with like consent on the part of such lessees, in connection with the institution and operation of any such cooperative or unit plan, as the commission deems necessary or proper to secure the proper protection of the interests of the state.
Ca. Pub. Res. Code § 6923