Every trust company shall deposit with the State Treasurer money or securities of the character described in Section 1572 as security for its court and private trusts as follows:
Whenever any such trust company receives trust funds or property, other than real property, from court trusts accepted by it to the amount of five hundred thousand dollars ($500,000), 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) as security for its court trusts, and money or securities having a market value of fifty thousand dollars ($50,000) as additional security for its private trusts.
Ca. Fin. Code § 1570