Cal. Fin. Code § 1574
Securities deposited pursuant to this article may be exchanged from time to time, with the approval of the commissioner, for other like securities of equal market value. Upon written request to the commissioner, any trust company shall be entitled to withdraw from the Treasurer, from time to time, any amount of its securities so deposited in excess of the amount it is required to maintain on deposit in order to conform with the requirements of this article. Upon receiving a written request for such withdrawal or exchange, and satisfactory proof of the facts warranting the same, the commissioner shall forthwith deliver to the Treasurer a written order directing the withdrawal or exchange of such securities so as to conform with the provisions of this section. The Treasurer shall comply with such written order. So long as the trust company so depositing such securities shall continue solvent, it shall have the right and shall be permitted by the Treasurer to receive the interest and dividends on any securities deposited by it.
Ca. Fin. Code § 1574