Cal. Fin. Code § 1571
Whenever any trust company receives trust funds or property, other than real property, from court trusts accepted by it to the amount of one million dollars ($1,000,000), it shall forthwith give the commissioner written notice thereof, and within 30 days thereafter shall make an additional deposit with the State Treasurer of money or securities having a market value of fifty thousand dollars ($50,000). For each additional five hundred thousand dollars ($500,000) of such trust funds thereafter received by any trust company from court trusts a similar notification in writing shall forthwith be given to the commissioner and a further deposit of money or securities having a market value of twenty-five thousand dollars ($25,000) shall be made within 30 days thereafter by such trust company with the State Treasurer until money or securities having a market value of five hundred thousand dollars ($500,000) have been so deposited.
Ca. Fin. Code § 1571