California Code, Public Resources Code - PRC § 6906

Administration of this article shall be under the principle of multiple use of public lands and resources, and shall allow coexistence of other permits or leases of the same lands for deposits of other minerals under applicable laws, and the existence of permits or leases issued pursuant to the provisions of this article shall not preclude other uses of the areas covered thereby.  However, operations under such other permits or leases or such other uses shall not unreasonably interfere with or endanger operations under any permit or lease issued pursuant to this article, nor shall operations under permits or leases issued pursuant to the provisions of this article unreasonably interfere with or endanger operations under any permit or lease issued pursuant to the provisions of any other act.  Nor shall this article be construed as superseding the authority which the head of any state department or agency has with respect to the management, protection, and utilization of the state lands and resources under his jurisdiction.  The commission may prescribe in its rules and regulations those conditions it deems to be necessary for the protection of other resources.