California Code, Education Code - EDC § 23101

(a) When a member's accumulated retirement contributions are refunded, as provided in Section 23100, all rights to benefits pertaining to the service credit represented by those contributions under this part are forfeited. Those rights and benefits, based upon service performed prior to refund, shall not be restored until the member has redeposited the total of the refunded accumulated retirement contributions, and paid the regular interest thereon as provided in Chapter 19 (commencing with Section 23200).

(b) In addition to the rights and benefits described in subdivision (a), any beneficiary designation made by a member pursuant to Chapter 20 (commencing with Section 23300) and Chapter 28 (commencing with Section 24300) under this part shall be invalidated upon the refund of the member's accumulated retirement contributions.