California Code, Revenue and Taxation Code - RTC § 12951

(a) If any amount has been illegally assessed, the board shall set forth that fact in its records, certify the amount determined to be assessed in excess of the amount legally assessed and the insurer or surplus line broker against which the assessment was made, and authorize the cancellation of the amount upon the records of the Controller and the board. The board shall mail a notice to the insurer or surplus line broker of any cancellation authorized. Any determination by the board pursuant to this section with respect to an amount in excess of fifty thousand dollars ($50,000) shall be available as a public record for at least 10 days after the effective date of that determination.

(b) This section shall become operative on July 1, 2013.