Cal. Food & Agric. Code § 80151

No person or common carrier shall transport, or receive or possess for transportation, any native plant or any wood, or part thereof, except its fruit or manufactured wood articles, that requires a permit, wood receipt, or tag and seal, unless the person offering the plant for shipment furnishes to the person or common carrier a valid permit therefor, and any required wood receipts, and has securely and properly attached thereto any required tag and seal. If for transportation outside of the state, the plant shall also bear a certificate of inspection by the department.