Cal. Education Code § 26607

(a) The board may declare by means of plan amendment with respect to the Cash Balance Benefit Program an additional annuity credit applicable to annuities being paid under the Cash Balance Benefit Program. (b) The declaration authorized by subdivision (a) may be made only when the board by plan amendment with respect to the Cash Balance Benefit Program declares an additional earnings credit as provided in Section 26605 and if the total amount of investment earnings of the plan with respect to the Cash Balance Benefit Program for the plan year exceeds the sum of the total amount required to credit all employee and employer accounts at the minimum interest rate, the administrative costs of the plan with respect to the Cash Balance Benefit Program for the plan year, any addition to be made to the Gain and Loss Reserve under subdivision (c) of Section 26202, the total amount required to credit all employee and employer accounts in respect of the additional earnings credit so declared, and any other obligations incurred by the plan with respect to the Cash Balance Benefit Program. (c) Any additional annuity credit with respect to the Cash Balance Benefit Program shall be based upon the annuity of the participant or beneficiary for the plan year and shall be paid as a lump sum to the participant or beneficiary on the date specified by the board.