California Code, Public Resources Code - PRC § 6830

All oil and gas leases issued by the commission for lands under its jurisdiction as set forth in Chapters 3 and 4 of Part 1 and in Chapter 3 of Part 2 of Division 6 of this code shall contain a reservation to the commission of the right to determine the spacing of wells and the rate of drilling and rate of production of such wells so as to prevent the waste of oil and gas and promote the maximum economic recovery of oil and gas from, and the conservation of reservoir energy in, each zone or separate underground source of supply of oil or gas covered in whole or in part by leases issued under this chapter.