Cal. Fish & Game Code § 7852.4

The owner of a vessel upon which a person who is at least 16, but less than 18, years of age, and who is licensed under Section 7852 is working shall obtain, and maintain in full force and effect at all times that a person is working on or about the vessel, a policy of insurance that provides indemnification to the person licensed under Section 7852 in case of accident or injury while working on or about the vessel.