Cal. Pub. Res. Code § 42511

The board shall assist cities and counties to divert nonyard wood wastes which cannot otherwise feasibly be reduced, recycled, or composted, for processing and utilization as a fuel resource, provided that the facilities which use the nonyard wood waste as a fuel resource have obtained any necessary permits which allow the use of those materials as a fuel and to the extent the diversion is consistent with the hierarchy set forth in Section 40051.