California Code, Education Code - EDC § 26702

(1) No action may be commenced by or against the board, the system, or the plan more than three years after all obligations to or on behalf of the participant or beneficiary have been discharged.

(2) In cases where the system makes an error resulting in incorrect payment to the participant or beneficiary, the system's right to commence recovery shall expire three years from the date of payment.

(3) If an erroneous payment is made due to lack of information or inaccurate information regarding eligibility of a participant or beneficiary to receive a benefit from the Cash Balance Benefit Program, the period of limitation shall commence when the system discovers the erroneous payment.