California Code, Public Resources Code - PRC § 6916

(a) The commission may issue leases for direct heat application of geothermal resources for nonelectrical purposes for a royalty of less than 10 percent of gross revenue if it determines that such a royalty would be in the best interests of the state.

(b) The commission may also waive, suspend, or reduce the rental or minimum royalty for the lands included in any permit or lease, or any portion thereof, and waive, suspend, alter, or amend the operating requirements contained in the lease or regulations adopted pursuant to this section affecting operations of the lease or permit, in the interests of conservation, and to encourage the greatest ultimate recovery of geothermal resources if the commission determines that the action is necessary or beneficial to promote development or finds that the permit or lease cannot be successfully operated under the permit or lease terms or under the regulations.