Vehicle Code § 9912
CHAPTER 3. Transfer of Title or Interest in Undocumented Vessel
Every dealer upon transferring by sale, lease or otherwise any undocumented vessel, whether new or used, required to be numbered under this code, shall, not later than the end of the next business day of the dealer, give written notice of the transfer to the department upon an appropriate form provided by it, but a dealer need not give the notice when selling or transferring a new unnumbered vessel to another dealer.